pBlock ElementsII 1 Question 36

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36. Which one of the following is the strongest base? $(1989,2 \mathrm{M})$

======= ####36. Which one of the following is the strongest base? $(1989,2 \mathrm{M})$

3e0f7ab6f6a50373c3f2dbda6ca2533482a77bed (a) $\mathrm{AsH}_{3}$

(b) $\mathrm{NH}_{3}$

(c) $\mathrm{PH}_{3}$

(d) $\mathrm{SbH}_{3}$

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Solution:

  1. Amongst $X \mathrm{H}{3}$ where ’ $X$ ’ is group- 15 elements, basic strength decreases from top to bottom. Hence, $\mathrm{NH}{3}$ is strongest base.