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Choose the correct statements about the hydrides of group 15 elements. A. The stability of the hydrides decreases in the order NH3 > PH3 > AsH3 > SbH3 > BiH3 B. The reducing ability of the hydride increases in the order NH3 < PH3 < AsH3 < SbH3 < BiH3 C. Among the hydrides, NH3 is strong reducing agent while BiH3 is mild reducing agent. D. The basicity of the hydrides increases in the order NH3 < PH3 < AsH3 < SbH3 < BiH3 Choose the most appropriate from the option given below

1. B and C only
2. A and B only
3. A and D only
4. C and D only

Correct answer: A and B only

Solution

Options A and B are correct because the stability of the hydrides decreases as you move down the group due to increasing atomic size and decreasing bond strength, while the reducing ability increases down the group as the hydrides become less stable and more willing to donate electrons.

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