Assertion : Bond angle of H2S is smaller than H2O. Reason : Electronegativity of the central atom increases, bond angle decreases.

Monjur Alahi

Directions : Each of these questions contain two statements, Assertion and Reason. Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select one of the codes (a), (b), (c) and (d) given below.
(a) Assertion is correct, reason is correct; reason is a correct explanation for assertion.
(b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
(c) Assertion is correct, reason is incorrect
(d) Assertion is incorrect, reason is correct.

Assertion : Bond angle of H2S is smaller than H2O.
Reason : Electronegativity of the central atom increases, bond angle decreases.


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Salim Ahmed Kawsar

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(c) Bond angle of H2S (92°) < H2O (104°31). As the electronegativity of the central atom decreases, bond angle decreases. In the present case, S is less electronegative than oxygen. Thus bond pairs in H2S are more away from the central atom than in H2O and thus repulsive forces between bond pairs are smaller producing smaller bond angle. 

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