Question

ASSERTION: Reducing character of hydrides of group 16 elements increases as the atomic number of central atom increases.

REASON: Due to strong force of attraction of H-E bond.

• A. Both A and R are true and R is the correct explanation of A.
• B. Both A and R are true and R is not the correct explanation of A.
• C. A is false but R is true
• D. A is true but R is false.

Answer 1

The correct option is D

A is true but R is false.

Explanation for Correct Option

Assertion:-

• As we go down the group the atomic size increases due to the addition of more shells.
• Also the atomic number of the central atom increases as well.
• Due to this factor the reducing character or the acidic character of the hydrides increase.
• Thus the assertion is true.

Explanation for reason:-

• We know that down the group atomic radius increases.
• Due to this increase in size, the bond energy or the force of attraction of the H-E bond in hydrides decreases.
• Therefore, the reducing character of the elements of group 16 increases as the atomic number of the central atom increases.
• Thus, the reason is false.

Therefore, option (D) A is true but R is false, is the correct answer.