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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.

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B

Both A and R are true and R is not the correct explanation of A.

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C

A is false but R is true

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D

A is true but R is false.

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Solution

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.


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