All practice questions

During the laboratory preparation of dry hydrogen chloride gas, concentrated tetraoxosulfate(VI) acid ($\text{H}_2\text{SO}_4$) is used as the drying agent rather than quicklime ($\text{CaO}$). Which of the following explains why quicklime cannot be used to dry hydrogen chloride gas?

A bakery operating in the short run incurs a Total Fixed Cost (TFC) of $\text{₦}1,200$. When output is $6$ loaves of bread, the bakery's Total Cost (TC) is $\text{₦}3,000$. When output increases to $7$ loaves, its Total Variable Cost (TVC) becomes $\text{₦}2,240$. What is the Marginal Cost (MC) of producing the $7\text{th}$ loaf?

Arrange the following stages of W.W. Rostow's economic growth model in their correct sequential order, starting from the earliest historical stage to the most advanced stage.

Tea and coffee are substitute goods in competitive demand. If the price of coffee rises significantly while the price of tea remains unchanged, which of the following market changes will occur for tea?

Match each seed germination structure or growth process on the left with its corresponding role during seedling development on the right.

A state tax board issues a public notice declaring that all business operators will be informed of their precise tax liabilities, payment deadlines, and calculation formulas six months prior to collection. Which canon of taxation is the government primarily implementing through this measure?

Under the French colonial administration in West Africa, why were the vast majority of Africans living outside the Four Communes of Senegal designated as sujets (subjects) rather than citoyens (citizens)?

In a democratic political system, supreme political power ultimately resides in the citizens, who exercise their collective will through periodic elections to establish, guide, and hold government authority accountable. Which core pillar of democracy does this statement describe?

A man with blood group A, whose mother had blood group O, marries a woman with blood group B, whose father had blood group O. What is the probability that their first child will have blood group O?

In the pre-colonial Igbo political system, major policy decisions affecting the entire community were rendered binding through which of the following mechanisms?

A West African country records a general price level ($P$) of $\text{N}250$ per transaction unit and a total volume of physical transactions ($T$) of $800,000$ units per year. If the velocity of money circulation ($V$) is $5$, calculate the required total money supply ($M$), in millions of naira, according to Fisher's Quantity Theory of Money equation ($MV = PT$).

A State House of Assembly in Nigeria passed a statute imposing criminal penalties on citizens who criticize state executive policies. A legal practitioner challenged the law at the High Court, asserting that it violates express provisions on fundamental rights under the 1999 Constitution. Upon examination, the court declared the statute unconstitutional, null, and void. Which judicial function or power is directly demonstrated in this court ruling?

Match each category of citizenship, fundamental right, or civic requirement under the Nigerian Constitution with its correct defining provision or legal condition.

To implement the Indirect Rule system in the decentralized, acephalous societies of Eastern Nigeria, the British colonial administration artificially created and appointed local sole executive authorities known as which of the following?

Match each constitutional mechanism of judicial independence on the left with its correct protective function on the right.

Match each noble gas listed on the left with its corresponding primary industrial application or physical property on the right.

During photosynthesis, light energy absorbed by chlorophyll drives essential chemical conversions within the thylakoid membranes of chloroplasts. Which of the following biological processes occurs specifically during this light-dependent stage?

A senior civil servant drafts detailed administrative guidelines for implementing a newly passed healthcare reform. When public debate and criticism arise regarding the implementation strategy, the political minister defends the policy publicly while the civil servant's identity is kept out of public view. Which characteristic of the civil service is best illustrated in this scenario?

Which fundamental constitutional feature distinguished the 1979 Constitution of Nigeria's Second Republic from the 1963 Republican Constitution?

Match each non-Mendelian genetic concept listed on the left with its corresponding biological example or defining feature on the right.