Question

On moving from left to right in a period what is the order of acidic character of hydrides?

• A. $NH_{3} < H_{2}O < HF$
• B. $HF < H_{2}O < NH_{3}$
• C. $H_{2}O < HF < NH_{3}$
• D. $H_{2}O < NH_{3} < HF$

Answer 1

Answer: (A)

$NH_{3} < H_{2}O < HF$

Answer 2

: On moving from left to right in a period, the acidic character of hydrides increases. $NH_{3}$is basic, $H_{2}O$is neutral and HF is acidic.