All practice questions

13931 questions

All types13,931 Multiple choice7,139 True / False771 Numeric1,526 Matching2,583 Ordering631 Fill in the blank1,223 Short answer58

Question 6261Question →

Pedogenesis involves progressive biochemical and physical alterations of parent material over extended periods. Which sequence correctly places the following stages of soil development in chronological order, from initial bedrock weathering to the establishment of a mature zonal soil profile?

Drag items to arrange them in the correct order

Show answer & explanation

Answer

The correct chronological sequence of soil formation is: bedrock breakdown into regolith, pioneer organism colonization and humification, topsoil eluviation, subsoil illuviation, and final zonal profile stabilization.

The correct sequence follows the natural progression of soil development: primary weathering creates parent regolith, biological colonization adds organic material, downward percolating water removes fine minerals via eluviation, these leached materials accumulate in the subsoil via illuviation, and sustained pedogenic action produces a mature zonal profile with distinct horizons.

Step-by-Step Solution

Identify the initial physical process required before soil development can begin

Weathering of solid parent bedrock into loose mineral regolith occurs first.

Soil cannot form without a substrate of loose mineral matter derived from parent rock disaggregation.

Determine the role of biological inputs in soil maturation

Pioneer organisms colonize the regolith, producing organic humus.

Humification transforms bare mineral regolith into a true soil substrate capable of supporting distinct horizons.

Trace the movement of water and materials through the developing profile

Eluviation leaches fine clays and soluble materials downward from the topsoil, followed by illuviation where these materials accumulate in the subsoil.

Eluviation (removal) must precede illuviation (deposition) in the chronological sequence of horizon differentiation.

Identify the final equilibrium state of pedogenesis

A mature zonal soil profile with stable O, A, E, B, and C horizons is established.

Horizonation reaches equilibrium over long periods under stable climatic and vegetation conditions.

Key Concept

Chronological stages of pedogenesis and soil profile differentiation

Question 6262Question →

A community in Nigeria has a recorded population distribution comprising $15{}000$ individuals aged under $15$ years, $40{}000$ individuals aged $15\text{--}64$ years, and $5{}000$ individuals aged $65$ years and above.

What is the demographic dependency ratio for this community?

50%

200%

33.3%

37.5%

Show answer & explanation

Answer: 50%

Answer

50%

The dependency ratio measures the number of dependents (aged 0–14 and 65+) relative to the working-age population (aged 15–64). Here, the total dependent population is

15{}000 + 5{}000 = 20{}000

. Dividing

20{}000

by the working-age population of

40{}000

gives

0.5

, which equals

50\%

Step-by-Step Solution

Calculate the total dependent population

15{}000 + 5{}000 = 20{}000

Dependents consist of individuals under 15 years old and individuals aged 65 years and above.

Identify the working-age (independent) population

40{}000

The working-age population comprises individuals between 15 and 64 years of age.

Apply the Dependency Ratio formula

\text{Dependency Ratio} = \left( \frac{20{}000}{40{}000} \right) \times 100 = 50\%

The formula divides the dependent population by the working-age population and expresses it as a percentage.

Key Concept

Demographic Dependency Ratio

Estimated Time:1m 0s

Question 6263Question →

Arrange the following sequential stages in the retreat of a waterfall and the subsequent formation of a river gorge, from the initial bedrock arrangement to the final landscape feature.

Drag items to arrange them in the correct order

Show answer & explanation

Answer

The correct order of stages in waterfall retreat and gorge formation begins with a river flowing over hard rock overlying soft rock, followed by undercutting of the softer rock to form an overhang, then collapse of the unsupported overhang into the plunge pool, and finally continuous headward retreat leaving behind a steep-sided gorge.

The evolution of a river gorge begins when running water encounters alternating rock strata, where a resistant rock layer overlies softer rock. Hydraulic action and abrasion erode the softer stratum beneath, creating an overhang above a plunge pool. When the overhang loses support, it collapses under gravity. As this sequence of undercutting and collapse repeats over time, the waterfall retreats upstream, leaving behind a narrow, steep-sided valley termed a gorge.

Step-by-Step Solution

Identify the initial geological precondition.

A resistant caprock overlying less resistant rock layer provides the differential erosion setup.

Differential erosion cannot occur without contrast in rock hardness.

Trace the process of mechanical river erosion at the base.

Undercutting creates a plunge pool and an unsupported caprock overhang.

Hydraulic action and abrasion preferentially hollow out the weaker underlying stratum.

Determine the structural breakdown stage.

The overhang collapses due to gravity.

Once the undercutting removes critical support beneath the hard caprock, collapse is inevitable.

Identify the long-term geomorphic outcome.

Headward retreat creates a gorge.

Repeated cycles of undercutting and collapse cause the waterfall to migrate upstream.

Key Concept

Waterfall Retreat and Gorge Formation

Question 6264Question →

Landlocked nations in East Africa, such as Uganda and Rwanda, rely heavily on specific trade transit axes to reach maritime ports for international commerce. Which regional economic grouping encompasses these member states and primarily utilizes the Northern Corridor terminating at Mombasa and the Central Corridor terminating at Dar es Salaam?

East African Community (EAC)

Economic Community of West African States (ECOWAS)

Arab Maghreb Union (UMA)

Southern African Development Community (SADC)

Show answer & explanation

Answer: East African Community (EAC)

Answer

East African Community (EAC)

The East African Community (EAC) comprises member states in East Africa, including landlocked nations like Uganda, Rwanda, and Burundi. These nations depend directly on the Northern Corridor (terminating at the Port of Mombasa, Kenya) and the Central Corridor (terminating at the Port of Dar es Salaam, Tanzania) for international trade.

Step-by-Step Solution

Identify the geographical transit corridors mentioned in the question stem.

The Northern Corridor links landlocked East African states to the port of Mombasa (Kenya), and the Central Corridor links them to Dar es Salaam (Tanzania).

Understanding transport geography is essential for linking interior African nations to maritime trade routes.

Determine which landlocked African nations depend on these specific port corridors.

Uganda, Rwanda, Burundi, and South Sudan are landlocked states using Mombasa and Dar es Salaam.

These states fall geographically within the East African sub-region.

Match these nations to their primary regional economic community.

These countries belong to the East African Community (EAC).

The EAC promotes trade integration and infrastructure development along these main transport corridors.

Key Concept

African Regional Transport Corridors and Economic Groupings

Estimated Time:1m 30s

Question 6265Question →

Match each commercial geography concept on the left with its corresponding economic feature or function on the right.

Click a left item, then click its matching right item

Show answer & explanation

Answer

Balance of Trade Deficit matches with the condition where visible imports exceed visible exports; Entrepôt Port matches with a port specializing in importing goods for storage and re-exportation; Terms of Trade matches with the index ratio of export prices to import prices; and Protective Tariff matches with a duty designed to safeguard domestic industries.

Each concept accurately pairs with its foundational economic definition in international trade geography: Balance of Trade Deficit reflects excess visible imports; Entrepôt Port describes transshipment and re-export trading posts; Terms of Trade describes the ratio of export prices to import prices; and Protective Tariff describes duties set up to shield local industries.

Step-by-Step Solution

Analyze trade balance concepts

Identify that visible trade balance deals strictly with physical goods. An excess of visible imports over exports constitutes a Balance of Trade Deficit.

Differentiates visible merchandise trade from invisible services within international balance account frameworks.

Analyze commercial port functions

Identify entrepôt ports as intermediary transit hubs designed for transshipment, duty-free storage, and re-export.

Distinguishes entrepôt ports from standard import/export consumer terminals.

Analyze price index measures

Identify Terms of Trade as the price ratio calculation expressed by (Index of Export Prices / Index of Import Prices) × 100.

Evaluates the relative purchasing capacity of a country's exports in foreign markets.

Analyze trade barrier instruments

Identify protective tariffs as fiscal barriers intended to raise import prices to defend home producers.

Separates revenue-raising tariffs from protective, industry-shielding commercial policies.

Key Concept

Core concepts and instruments of international trade and commercial geography

Estimated Time:2m 0s

Question 6266Question →

Arrange the following geographic features and locations along the course of the Nile River in sequential order from its source region in Equatorial Africa to its terminus at the Mediterranean Sea.

Drag items to arrange them in the correct order

Show answer & explanation

Answer

The correct sequence from upstream (source) to downstream (mouth) is: Lake Victoria source area in Equatorial East Africa, followed by the Sudd wetland basin in South Sudan, then the confluence of the White Nile and Blue Nile at Khartoum, and finally Lake Nasser and the Aswan High Dam in Egypt.

The Nile River flows northward from the East African Plateau to the Mediterranean Sea. The correct order from source to mouth begins at Lake Victoria, moves north to the Sudd wetlands in South Sudan, continues to the junction of the White and Blue Nile rivers at Khartoum, and reaches Lake Nasser behind the Aswan High Dam in lower Egypt.

Step-by-Step Solution

Identify the source region of the river system.

The White Nile originates in the Equatorial Lakes region around Lake Victoria in East Africa.

Rivers flow from high elevation/source headwaters toward lower elevation drainage outlets.

Trace the course through South Sudan.

North of the Equatorial Plateau, the river enters the flat, swampy Sudd wetland region in South Sudan.

The reduced gradient causes the river to spill into extensive wetlands before consolidating northward.

Locate the major confluence in Sudan.

At Khartoum (capital of Sudan), the White Nile merges with its major tributary, the Blue Nile coming from Lake Tana in Ethiopia.

This merger significantly increases the total discharge of the main Nile stream.

Trace the river to its lower course infrastructure and outlet.

In southern Egypt, the river enters Lake Nasser behind the Aswan High Dam, subsequently flowing through Egypt into the Nile Delta and discharging into the Mediterranean Sea.

The Aswan High Dam impounds the lower course of the Nile prior to its broad delta outlet.

Key Concept

The spatial sequence and physical characteristics along the course of the Nile River basin from source to mouth.

Question 6267Question →

On 30th June 2026, the Cash Book bank column of Emeka Enterprises showed a debit balance of $\text{NGN } 45,000$ . Upon comparison with the Bank Statement, the following items causing discrepancies were identified:

- Direct credit for dividends received directly by the bank: $\text{NGN } 2,500$
- Bank charges not yet recorded in the Cash Book: $\text{NGN } 1,200$
- Standing order payment for insurance: $\text{NGN } 3,000$
- Unpresented cheques: $\text{NGN } 8,500$
- Uncredited lodgements: $\text{NGN } 5,400$

What is the adjusted Cash Book balance in NGN prior to preparing the Bank Reconciliation Statement?

Show answer & explanation

Answer: 43300

Answer

The adjusted Cash Book balance is NGN 43,300.

The adjusted Cash Book balance is calculated by taking the initial Cash Book debit balance of

\text{NGN } 45,000

, adding unrecorded direct credits (dividends of

\text{NGN } 2,500

), and deducting unrecorded bank payments/charges (bank charges of

\text{NGN } 1,200

and standing order of

\text{NGN } 3,000

), giving

\text{NGN } 43,300

. Unpresented cheques and uncredited lodgements do not adjust the Cash Book because they are already present in the Cash Book.

Step-by-Step Solution

Categorize the discrepancy items based on accounting treatment.

Direct credit (

\text{NGN } 2,500

), bank charges (

\text{NGN } 1,200

), and standing order (

\text{NGN } 3,000

) require entries in the Cash Book. Unpresented cheques and uncredited lodgements are timing differences handled in the reconciliation statement.

The Cash Book must first be updated for items that the bank has processed but the enterprise has not yet entered.

Calculate the updated Cash Book balance.

\text{NGN } 45,000 + \text{NGN } 2,500 - \text{NGN } 1,200 - \text{NGN } 3,000 = \text{NGN } 43,300

Direct receipts increase the debit balance, whereas unrecorded payments and fees decrease it.

Key Concept

Distinguishing Cash Book adjustment items (unrecorded bank transactions) from Bank Reconciliation Statement items (unpresented cheques and uncredited deposits).

Question 6268Question →

Soft drink bottling plants and commercial bakeries in Nigeria are predominantly located in major urban centers such as Lagos, Ibadan, and Kano rather than near rural raw material sources. What primary industrial location factor accounts for this spatial distribution?

The manufacturing process is weight-gaining because heavy ubiquitous inputs like water are added to light concentrated ingredients

The primary raw materials are weight-losing and lose substantial mass during the conversion into finished consumer goods

The production line requires specialized low-cost labor concentrated exclusively in suburban agrarian belts

The industry is footloose and operates without any influence from spatial variations in transportation costs

Show answer & explanation

Answer: The manufacturing process is weight-gaining because heavy ubiquitous inputs like water are added to light concentrated ingredients

Answer

The manufacturing process is weight-gaining because heavy ubiquitous inputs like water are added to light concentrated ingredients

Soft drink bottling and baking represent classic weight-gaining industries. In bottling, concentrated ingredients are light and easy to ship, whereas water is heavy but universally accessible. By combining water with concentrate directly inside high-demand consumer centers like Lagos, Ibadan, or Kano, firms minimize the overall expense of transporting heavy liquid products over long distances.

Step-by-Step Solution

Classify the raw materials used in soft drink production

Flavoring syrup is a localized raw material (imported or produced at central hubs), while water is a ubiquitous raw material available in almost all urban centers.

According to Weber's industrial location theory, ubiquitous inputs do not pull manufacturing to raw material extraction sites.

Determine the change in product weight during processing

Adding large volumes of water to small quantities of syrup generates a final product that is significantly heavier and bulkier than the localized inputs.

This establishes a weight-gaining manufacturing process with a Material Index of less than 1.0.

Identify the least-cost spatial location for the factory

Locating plants inside major urban markets minimizes freight expenses on fragile, heavy bottled products.

Shipping compact concentrate to metropolitan areas and bottling near consumers yields the lowest total transport expenditure.

Key Concept

Market-oriented location factors for weight-gaining manufacturing industries

Question 6269Question →

Tin and columbite are major solid minerals extracted in Nigeria. In which of the following regions are these minerals predominantly mined?

Jos Plateau

Niger Delta basin

Ewekoro region

Itakpe hill area

Show answer & explanation

Answer: Jos Plateau

Answer

Tin and columbite are predominantly mined on the Jos Plateau.

The Jos Plateau in north-central Nigeria is the principal mining region for tin ore (cassiterite) and columbite, as these minerals are naturally associated in the Jurassic Younger Granites of the area.

Step-by-Step Solution

Identify the primary geological occurrence of tin and columbite in Nigeria.

Tin (cassiterite) and columbite occur in associated placer deposits on the Jos Plateau within Plateau State.

Geological weathering of Younger Granites on the plateau produced rich alluvial deposits of both minerals.

Key Concept

Spatial distribution of solid minerals in Nigeria

Estimated Time:45s

Question 6270Question →

Match each major African river in Column A with its primary body of water or drainage outlet in Column B.

Click a left item, then click its matching right item

Show answer & explanation

Answer

The Nile River matches with the Mediterranean Sea; the Congo River matches with the Atlantic Ocean; the Zambezi River matches with the Indian Ocean; and the River Niger matches with the Gulf of Guinea.

Each major African river is correctly paired with its ocean or sea destination: the Nile River discharges into the Mediterranean Sea, the Congo River drains into the Atlantic Ocean, the Zambezi River flows into the Indian Ocean, and the River Niger empties into the Gulf of Guinea.

Step-by-Step Solution

Identify the primary flow directions and outlets of major African rivers.

Nile flows north to the Mediterranean Sea; Congo flows west to the main Atlantic Ocean; Zambezi flows east to the Indian Ocean; Niger flows south-east to the Gulf of Guinea.

Determining the terminal drainage basin for each major river allows accurate matching of river systems with their ocean or sea outlets.

Key Concept

Major African Rivers and Their Discharge Outlets

Question 6271Question →

A business firm paid $\text{N}80,000$ cash to a trade supplier to fully settle an outstanding debt of $\text{N}84,000$ , having received a prompt payment discount of $\text{N}4,000$ . What is the correct double-entry posting for the $\text{N}4,000$ discount, and how is the discount account classified in the ledger?

Credit Discount Received account with

\text{N}4,000

; classified as a nominal account

Debit Discount Allowed account with

\text{N}4,000

; classified as a nominal account

Credit Trade Payables account with

\text{N}4,000

; classified as a personal account

Credit Purchases account with

\text{N}4,000

; classified as a real account

Show answer & explanation

Answer: Credit Discount Received account with $\text{N}4,000$ ; classified as a nominal account

Answer

Credit Discount Received account with

\text{N}4,000

; classified as a nominal account.

When settling a debt of

\text{N}84,000

for

\text{N}80,000

cash, the remaining

\text{N}4,000

is a financial gain known as Discount Received. Under double-entry rules, all gains and incomes are credited. Because revenue and expense items belong to nominal accounts, Discount Received is classified as a nominal account.

Step-by-Step Solution

Identify the nature of the discount transaction

The discount of

\text{N}4,000

is a cash discount received from a supplier for prompt payment.

Paying a supplier less than the full invoice value to settle an account yields a cash discount received.

Apply double-entry principles to the discount

Credit Discount Received account with

\text{N}4,000

Discount Received represents revenue/gain. Under the rules of double entry, all revenues and gains are credited.

Classify the ledger account type

Discount Received is classified as a Nominal Account.

Nominal accounts deal with expenses, losses, revenues, and gains.

Key Concept

Double Entry Rules for Cash Discounts and Account Classification

Estimated Time:1m 0s

Question 6272Question →

An environmental planning agency in Nigeria is designing a Geographic Information System (GIS) database to assess flood vulnerability in the Niger Delta. The analysis requires representing a continuous land elevation surface alongside discrete road networks. Furthermore, satellite imagery must be acquired during nighttime and heavy cloud cover conditions. Which of the following correctly identifies the appropriate GIS data model for the elevation surface and the sensor type required for imagery acquisition?

The elevation surface is best represented using a raster data model of pixel grid cells, while data acquisition requires an active microwave sensor.

The elevation surface is best represented using a vector data model of points and lines, while data acquisition requires a passive optical sensor.

The elevation surface is best represented using a raster data model based on topological polygons, while data acquisition requires a passive thermal sensor.

The elevation surface is best represented using a vector data model of pixel grid cells, while data acquisition requires an active solar sensor.

Show answer & explanation

Answer: The elevation surface is best represented using a raster data model of pixel grid cells, while data acquisition requires an active microwave sensor.

Answer

The elevation surface is best represented using a raster data model of pixel grid cells, while data acquisition requires an active microwave sensor.

The correct answer accurately pairs the raster data structure—which represents continuous surface variations via a grid of pixels—with active microwave remote sensing, which provides its own radiation source capable of penetrating atmospheric clouds and operating at night.

Step-by-Step Solution

Analyze spatial data representation requirements

Continuous spatial phenomena like elevation surfaces (Digital Elevation Models) are continuously varying and best stored as grid cells in a raster data model, whereas discrete features like roads use vector geometry.

Raster grid structures assign an elevation value to every pixel across a continuous space.

Determine remote sensing atmospheric and temporal constraints

Active sensors generate their own electromagnetic radiation (e.g., microwave RADAR signals) which can penetrate cloud cover and operate independent of daylight.

Passive sensors rely on ambient sunlight or earth radiation, which cloud cover obstructs.

Combine data model and sensor requirements to select correct pairing

The correct combination is raster data model paired with an active microwave sensor.

This combination fulfills both continuous spatial modeling and all-weather day/night image capture.

Key Concept

GIS Raster vs Vector Data Models and Active vs Passive Remote Sensing Sensors

Question 6273Question →

In a limestone region, a surface stream suddenly disappears underground through an opening formed by carbonation and solution, leaving the river valley downstream dry. Which karst landform is formed at the exact point where the stream sinks underground?

Swallow hole

Uvala

Stalagmite

Polje

Show answer & explanation

Answer: Swallow hole

Answer

A swallow hole (also known as a ponor or sinkhole shaft) is the feature formed where a surface stream disappears subterraneanly into carbonated limestone bedrock.

In limestone regions, surface water containing carbonic acid dissolves vertical joints in the bedrock. Over time, these joints widen into funnel-shaped openings or vertical shafts known as swallow holes (or ponors). When a surface stream reaches a swallow hole, it plunges underground into a subterranean drainage system, leaving the valley lower downstream completely dry.

Step-by-Step Solution

Analyze the geomorphic process described in the stem

Groundwater carbonation dissolves joints in limestone bedrock, allowing surface runoff to carve vertical passages underground.

Rainwater containing dissolved carbon dioxide (

\text{H}_2\text{CO}_3

) acts on calcium carbonate (

\text{CaCO}_3

) to dissolve limestone bedrock along vertical joints.

Identify the specific landform created at the point of river disappearance

The entrance or shaft through which a river flows into subterranean cavern systems is known as a swallow hole or ponor.

As the swallow hole enlarges, the entire river is diverted underground, leaving the dry valley downstream without water flow.

Key Concept

Karst Drainage Features and Stream Disappearance

Question 6274Question →

Match each key public financial officer in Nigeria with their correct statutory duty or constitutional responsibility.

Click a left item, then click its matching right item

Show answer & explanation

Answer

Accountant-General of the Federation matches with Compiling Treasury accounts and preparing annual financial statements of the federal government; Auditor-General for the Federation matches with Conducting statutory post-execution audit of public accounts and reporting directly to the National Assembly; Accounting Officer (Permanent Secretary) matches with Exercising financial control and day-to-day vote administration within a specific government ministry; Minister of Finance matches with Formulating macroeconomic fiscal policies and supervising general financial matters of the government.

In public sector financial management in Nigeria, responsibilities are legally separated. The Accountant-General compiles central government accounts and handles treasury operations. The Auditor-General conducts independent external audits and reports to the National Assembly. The Accounting Officer (Permanent Secretary) manages individual ministry allocations and ensures compliance with financial regulations. The Minister of Finance coordinates national macroeconomic policies and budget execution.

Step-by-Step Solution

Identify the Treasury record-keeping authority of public sector accounting.

The Accountant-General of the Federation manages central Treasury records and compiles annual public financial accounts.

The Treasury department oversees government financial transactions and consolidated reporting.

Identify the constitutional independent oversight body.

The Auditor-General for the Federation performs post-payment financial verification and reports audit findings to the legislature.

Section 85 of the Nigerian 1999 Constitution establishes the independence of the external auditor from executive control.

Differentiate ministry-level vote accountability from cabinet-level fiscal supervision.

The Permanent Secretary is the Accounting Officer responsible for internal ministry expenditure, whereas the Minister of Finance manages broader fiscal policies and public revenue coordination.

The Finance Control and Management Act delegates daily vote control to administrative heads of ministries.

Key Concept

Statutory Functions and Roles of Key Public Financial Officers in Nigeria

Question 6275Question →

Apex Limited issued 2,000, 10% debentures of ₦100 each at a discount of 5% on 1st April 2024. If the company closes its accounting books on 31st December 2024, what is the amount of debenture interest to be charged to the Profit and Loss Account for the year?

₦15,000

₦20,000

₦14,250

₦19,000

Show answer & explanation

Answer: ₦15,000

Answer

The debenture interest to be charged to the Profit and Loss Account is ₦15,000.

Debenture interest is a fixed charge against profit and must be calculated on nominal value (

2,000 \times ₦100 = ₦200,000

). For the 9-month period from 1st April to 31st December 2024, interest payable is

₦200,000 \times 10\% \times \frac{9}{12} = ₦15,000

Step-by-Step Solution

Calculate the total nominal (face) value of the debentures issued.

Total Nominal Value =

2,000 \times ₦100 = ₦200,000

Debenture interest is always computed on nominal value, regardless of whether debentures are issued at par, premium, or discount.

Calculate the annual debenture interest.

Annual Interest =

10\% \times ₦200,000 = ₦20,000

The rate specified on debentures (10%) is an annual coupon rate.

Time-apportion interest for the period from issue date (1st April 2024) to year-end (31st December 2024).

Interest for 9 months =

₦20,000 \times \frac{9}{12} = ₦15,000

The debentures were held for 9 months during the financial year.

Key Concept

Debenture Interest Calculation and Time Apportionment

Estimated Time:1m 30s

Question 6276Question →

Match each geographic region in West Africa with the primary factor that influences its population density.

Click a left item, then click its matching right item

Show answer & explanation

Answer

Niger Delta matches with abundant petroleum resources and coastal commerce; Sahel Zone matches with arid climate restricting agriculture; Jos Plateau matches with temperate climate and historical tin mining.

Each region correctly aligns with its dominant density driver: the Niger Delta is densely populated due to economic opportunities in the oil sector and coast; the Sahel is sparsely populated due to harsh arid climate; the Jos Plateau is densely populated due to favorable cool weather and mining history.

Step-by-Step Solution

Identify the primary economic and physical geographic characteristics of the Niger Delta region.

Recognize that oil exploration and coastal trade create dense settlement opportunities.

Economic activities associated with crude oil draw large populations despite swampy terrain.

Analyze the climatic conditions of the Sahel Zone.

Identify aridity and limited water availability as physical constraints.

Low rainfall and desertification limit crop yields, resulting in sparse population density.

Evaluate the environmental and economic factors of the Jos Plateau.

Match the highland altitude and mineral history to human settlement patterns.

Favorable cool climate and historic economic pull from mining encourage high population density.

Key Concept

Physical and socio-economic factors influencing regional population density

Question 6277Question →

The Cash Book balance of Kalu Traders on 31st December 2025 showed a debit balance of ₦45,000. Upon comparing the Cash Book with the Bank Statement, the following items were identified:

- Bank charges not entered in Cash Book: ₦1,500
- Standing order payment for insurance: ₦2,000
- Credit transfer (direct deposit) by a customer: ₦6,000
- Unpresented cheques: ₦12,000
- Uncredited lodgements: ₦8,500

What is the adjusted cash book balance?

��47,500 debit balance

₦51,000 debit balance

₦42,500 debit balance

₦44,000 debit balance

Show answer & explanation

Answer: ��47,500 debit balance

Answer

₦47,500 debit balance

To arrive at the adjusted cash book balance, start with the unadjusted debit balance of ₦45,000, add the credit transfer of ₦6,000 received directly into the bank, and subtract bank charges of ₦1,500 and the standing order payment of ₦2,000. This yields a net corrected debit balance of ₦47,500. Unpresented cheques and uncredited lodgements are timing differences between the bank statement and cash book, so they must be excluded from cash book adjustments.

Step-by-Step Solution

Identify items that require adjustment in the Cash Book

Items to include: Bank charges (₦1,500), Standing order (₦2,000), Credit transfer (₦6,000). Exclude timing differences: Unpresented cheques and Uncredited lodgements.

Only items omitted from the cash book or errors made within it are adjusted in the cash book. Timing differences are handled strictly in the bank reconciliation statement.

Apply debit and credit entries to the initial Cash Book balance

Add direct deposit: ₦45,000 + ₦6,000 = ₦51,000; Deduct bank charges and standing order: ₦51,000 - ₦1,500 - ₦2,000 = ₦47,500.

Direct deposits increase the cash book balance (debit), while bank charges and standing order payments decrease the cash book balance (credit).

Key Concept

Adjusted Cash Book Preparation

Question 6278Question →

Historical tin and columbite extraction on the Jos Plateau left extensive open-cast pits (paddocks) and toxic spoil heaps, creating severe land degradation and safety risks. Which of the following interventions represents the most effective and ecologically appropriate land management strategy for restoring these degraded mine sites?

Reclaiming the terrain by leveling spoil heaps, backfilling abandoned paddocks, and re-vegetating with fast-growing, drought-resistant tree species

Mandating the National Oil Spill Detection and Response Agency (NOSDRA) to deploy marine containment booms and bioremediation chemicals across paddock waters

Constructing check dams and geotextile silt fences to control severe gully erosion induced by petroleum dredging in Cretaceous sedimentary basins

Allowing natural attenuation while burning leftover mineral tailings, treating metallic overburden as rapidly renewable organic soil nutrients

Show answer & explanation

Answer: Reclaiming the terrain by leveling spoil heaps, backfilling abandoned paddocks, and re-vegetating with fast-growing, drought-resistant tree species

Answer

Reclaiming the terrain by leveling spoil heaps, backfilling abandoned paddocks, and re-vegetating with fast-growing, drought-resistant tree species

The correct strategy for restoring degraded tin-mining landscapes on the Jos Plateau combines mechanical earthwork (leveling spoil heaps and backfilling excavated paddocks) with biological stabilization (re-vegetation and afforestation). This resolves structural hazards, reduces ponding, and initiates soil recovery.

Step-by-Step Solution

Identify the nature of the environmental hazard and its geographic location

The hazard consists of open-cast mining pits (paddocks) and spoil mounds caused by solid mineral extraction (tin and columbite) on the Jos Plateau in North-Central Nigeria.

Understanding the physical characteristics of the degradation determines the appropriate restoration engineering strategy.

Evaluate the appropriate physical and biological restoration methods

Open pits require earth-moving operations (leveling mounds and backfilling pits) followed by biological stabilization via tree planting (afforestation).

Mechanical reshaping removes physical hazards and water-logging, while vegetation prevents ongoing soil erosion and restores fertility.

Distinguish correct institutional mandates and mineral locations from distractors

Solid mineral degradation falls under land reclamation policies, whereas oil spill agencies (NOSDRA) and petroleum basin hazards belong to the Niger Delta coastal region.

Regulatory frameworks and remediation techniques must align with the specific hazard type and regional geography.

Key Concept

Land Degradation and Reclamation in Nigerian Mining Regions

Estimated Time:2m 0s

Question 6279Question →

To control the rapid advancement of desertification and soil degradation across the Sudano-Sahelian belt of Northern Nigeria, the establishment of shelterbelts of drought-resistant trees is widely promoted. Which of the following best explains how shelterbelts primarily mitigate land degradation in this vulnerable ecological zone?

By reducing surface wind velocity to minimize mechanical deflation and retain soil moisture

By accelerating the in-situ chemical weathering of parent bedrock to continuously generate fresh topsoil layers

By converting non-renewable atmospheric carbon into permanent geological fossil fuel reserves

By replacing the mandatory statutory stages of Environmental Impact Assessments prior to land development

Show answer & explanation

Answer: By reducing surface wind velocity to minimize mechanical deflation and retain soil moisture

Answer

Shelterbelts primarily mitigate land degradation by reducing surface wind velocity to minimize mechanical deflation and retain soil moisture.

Shelterbelts consist of dense linear plantings of trees positioned perpendicular to prevailing wind directions. In semi-arid regions like Northern Nigeria, they significantly decrease surface wind speed, preventing wind deflation (the stripping away of fine topsoil particles) and reducing evapotranspiration, thereby preserving soil fertility and moisture.

Step-by-Step Solution

Identify the primary environmental hazard and degradation mechanism in Northern Nigeria's Sudano-Sahelian zone.

The region is predominantly affected by wind erosion (deflation) and desertification driven by strong dry winds acting on dry, sparse soil.

Sparse vegetative cover and high wind speeds make topsoil vulnerable to detachment and aerial transport.

Analyze the physical function of tree shelterbelts in environmental management.

Planted rows of trees perpendicular to prevailing winds create a friction barrier that reduces wind kinetic energy close to the ground.

Lowering wind velocity directly reduces soil particle lifting and evaporation rates.

Distinguish the primary mechanism from incorrect geological or administrative processes.

Mechanical wind reduction directly targets topsoil deflation, whereas weathering involves rock decay, fossil fuels form over geological time, and EIAs are regulatory planning steps.

Option analysis confirms that physical wind velocity reduction is the accurate functional mechanism of shelterbelts.

Key Concept

Desertification Control and Wind Erosion Mitigation via Shelterbelts

Estimated Time:2m 0s

Question 6280Question →

Lake Victoria and Lake Tanganyika are two of the largest lakes in Africa, yet they differ significantly in their geomorphological origins and bathymetric characteristics. Which of the following statements correctly distinguishes Lake Victoria from Lake Tanganyika?

Lake Victoria occupies a broad, downwarped crustal basin between the east and west rift valleys, whereas Lake Tanganyika is a deep rift valley lake formed within a faulted graben.

Lake Victoria is an endorheic lake with no ocean outlet, whereas Lake Tanganyika flows directly northwards into the Mediterranean Sea.

Lake Victoria was formed by lava damming of a major river course, whereas Lake Tanganyika originated as a remnant of an ancient marine inlet.

Lake Victoria is bounded by steep, vertical fault escarpments, whereas Lake Tanganyika occupies a gentle, shallow depression in the plateau.

Show answer & explanation

Answer: Lake Victoria occupies a broad, downwarped crustal basin between the east and west rift valleys, whereas Lake Tanganyika is a deep rift valley lake formed within a faulted graben.

Answer

Lake Victoria occupies a broad, downwarped crustal basin between the east and west rift valleys, whereas Lake Tanganyika is a deep rift valley lake formed within a faulted graben.

Lake Victoria was created by gentle downwarping of the central plateau surface between the two branches of the Great Rift Valley, giving it a large surface area but shallow depth. Lake Tanganyika formed in a deep fault trough (graben) of the Western Rift Valley, making it the longest and second deepest lake in Africa.

Step-by-Step Solution

Analyze the formation mechanism of Lake Victoria.

Lake Victoria sits in a shallow depression formed by gentle earth movements (downwarping) between the Western and Eastern Rift Valleys.

Understanding crustal warping explains why Lake Victoria is relatively shallow despite its vast surface area.

Analyze the formation mechanism of Lake Tanganyika.

Lake Tanganyika is a tectonic rift lake situated in a deep block-faulted trough (graben).

Rift valley lakes are characterized by great depth, steep sides, and narrow linear shapes.

Compare the structural differences to evaluate the options.

The statement identifying Lake Victoria as downwarped and Lake Tanganyika as a faulted graben rift lake correctly differentiates the two.

This captures the fundamental geomorphological classification of African lakes.

Key Concept

Geomorphological Classification of African Lakes (Rift Valley Lakes vs. Crustal Basin Lakes)

Estimated Time:1m 0s

PreviousPage 314 / 697Next

All practice questions

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

Answer

Step-by-Step Solution

Key Concept

Common Mistakes

Answer

Step-by-Step Solution

Key Concept