P Block Elements Group 15 16 17 And 18 Question 4
Question 4 - 2024 (30 Jan Shift 2)
Choose the correct statements about the hydrides of group 15 elements.
A. The stability of the hydrides decreases in the order $NH _3>PH _3>AsH _3>SbH _3>BiH _3$
B. The reducing ability of the hydrides increases in the order $NH _3<PH _3<AsH _3<SbH _3<BiH _3$
C. Among the hydrides, $NH _3$ is strong reducing agent while $BiH _3$ is mild reducing agent.
D. The basicity of the hydrides increases in the order $NH _3<PH _3<AsH _3<SbH _3<BiH _3$
Choose the most appropriate from the option given below:
(1) B and C only
(2) C and D only
(3) A and B only
(4) A and D only
Show Answer
Answer (3)
Solution
On moving down the group, bond strength of $M-H$ bond decreases, which reduces the thermal stability but increases reducing nature of hydrides, hence A and B are correct statements.
BETA
