Match the chemical compounds in List I with their primary industrial applications and dail… — State PSC Exam

Match the chemical compounds in List I with their primary industrial applications and daily life functions in List II.

Hydrazine ( $N_2H_4$ )Oxygen scavenger in industrial boiler water conditioning and hypergolic rocket propellant component
Sodium Thiosulfate ( $Na_2S_2O_3$ )Antichlor reagent to neutralize residual chlorine in textile bleaching and photographic fixing agent
Calcium Phosphate ( $Ca_3(PO_4)_2$ )Primary inorganic structural constituent of human tooth enamel and skeletal bone matrix
Zeolite (Hydrated Aluminosilicate)Ion-exchange molecular sieve for hard water softening in laundry detergents and shape-selective catalyst

Answer

Hydrazine correctly pairs with its industrial role as a boiler water oxygen scavenger and propellant; Sodium Thiosulfate correctly pairs with its application as an antichlor agent and photographic fixer; Calcium Phosphate pairs with its biological role as the structural constituent of tooth enamel and bone; Zeolite pairs with its function as an ion-exchange water softener and catalyst.

Each chemical compound is accurately linked to its specific functional role: Hydrazine acts as an oxygen scavenger in boiler feed water; Sodium Thiosulfate acts as an antichlor and photographic fixer; Calcium Phosphate forms the mineral structure of tooth enamel and bone; Zeolite acts as an ion-exchange medium for water softening.

Step-by-Step Solution

Identify the industrial function of Hydrazine (

N_2H_4

Hydrazine reacts quantitatively with dissolved oxygen to yield nitrogen gas and water, preventing pitting corrosion in steam boilers without increasing dissolved solid content.

Its strong reducing action makes it ideal for water treatment and rocket fuel formulations.

Determine the application of Sodium Thiosulfate (

Na_2S_2O_3

Sodium thiosulfate neutralizes excess chlorine left on textiles post-bleaching (acting as an antichlor) and forms soluble thiosulfato-argentate complexes in film processing.

These chemical reactions define its dual identity as an antichlor and photographic fixing agent ('hypo').

Analyze the biochemical structural role of Calcium Phosphate (

Ca_3(PO_4)_2

In biological systems, crystalline calcium phosphate derivatives (hydroxyapatite) construct the hard mineral phase of bones and dental enamel.

It supplies structural integrity against mechanical stress in mammalian anatomy.

Evaluate the chemical utility of Zeolites.

Microporous sodium aluminosilicates exchange their structural

Na^+

ions for hard-water

Ca^{2+}

and

Mg^{2+}

ions, making them effective builders in eco-friendly detergents.

Their defined molecular pore networks also allow shape-selective catalytic cracking in petroleum refineries.

Key Concept

Industrial applications and daily life functions of inorganic compounds

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