question_answer

Hybridisation of the underlined atom changes in

A) \[\underline{Al}{{H}_{3}}\]changes to \[AlH_{4}^{-}\]

B) \[{{H}_{2}}\underline{O}\]changes to\[{{H}_{3}}{{O}^{+}}\]

C) \[\underline{N}{{H}_{3}}\]changes to\[NH_{4}^{-}\]

D)  All the above cases

Correct Answer: A

Solution :

 

S. No.	Molecule Hybridisation	Structure	Changes
[a]	\[Al{{H}_{3}}\] \[s{{p}^{2}}\]		Change in hybridisation as well as in shape
[b]	\[{{H}_{2}}O\] \[s{{p}^{3}}\] \[(2bp+2lp)\]	\[{{H}_{2}}{{O}^{+}}\] \[s{{p}^{3}}\]	Change in shape only, bent to pyramidal
[c]	\[N{{H}_{3}}\] \[s{{p}^{3}}\] \[(3bp+1lp)\]	\[NH_{4}^{+}\] \[s{{p}^{3}}\] \[(4bp)\]	Change in shape only, pyramidal to tetrahedral