Question

Match list I with list II:

List I		List II
A	K	I	Thermonuclear reactions
B	KCl	II	Fertilizer
C	KOH	III	Sodium potassium pump
D	Li	IV	Absorbent of CO2

Choose the correct answer from the options given below:

• A. A-III, B-II, C-IV, D-I
• B. A-IV, B-II, C-I, D-III
• C. A-IV, B-III, C-I, D-II
• D. A-V, B-I, C-IV, D-II

Hint:

KCl is often used as a fertilizer because potassium is an essential nutrient for plant growth, and KOH’s role in the sodium-potassium pump is vital for maintaining cellular function.

Answer 1

The Correct Option is C

To match List I with List II correctly, we need to understand the properties and common uses of the elements and compounds in List I: 

1. K (Potassium): Potassium ions play an essential role in numerous physiological processes, including actions of the sodium-potassium pump. In the Na/K pump, potassium moves into cells while sodium is pumped out, which is crucial for cellular function.
2. KCl (Potassium Chloride): Potassium chloride is widely used as a fertilizer in agriculture due to its high potassium content, which is essential for plant growth.
3. KOH (Potassium Hydroxide): Potassium hydroxide is an absorbent for carbon dioxide (CO₂). It reacts with CO₂ to form potassium carbonate.
4. Li (Lithium): Lithium is used in thermonuclear reactions. It is a fuel in thermonuclear weapons and acts as a neutron absorber.

Now, we align these with List II:

List I		List II
A	K	III	Sodium potassium pump
B	KCl	II	Fertilizer
C	KOH	IV	Absorbent of CO2
D	Li	I	Thermonuclear reactions

Thus, the correct matching is:

• A - III: K is involved in the sodium potassium pump.
• B - II: KCl is used as a fertilizer.
• C - IV: KOH is an absorbent of CO₂.
• D - I: Li is used in thermonuclear reactions.

Therefore, the correct answer is: A-IV, B-III, C-I, D-II.