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Base strength of (1) H(3)Coverset(The...

Base strength of
`(1) H_(3)Coverset(Theta)(C)H_(2), (2) H_(2)C=overset(Theta)(C)H` and (3) `H-C-=overset(Theta)(C)` is in the order of

A

(i)gt(iii)gt(ii)

B

(i)gt(ii)gt(iii)

C

(ii)gt(i)gt(iii)

D

(iii)gt(ii)gt(i)

Text Solution

Verified by Experts

The correct Answer is:
B
`CH_(3) underset(sp^3)(-) overset(Theta)( C) H_(2) " " CH_(2) underset(sp^(2))(=) overset(Theta) ( C) H " " CH underset(sp)(-=) overset(Theta) (C )`
order of electro negativity `sp gt sp^(2) gt sp^(3)`
s-character is `implies 50% 33.33% 25 %` (s-character decreases) on increasing E.N. basic strength decreases
hence order is `CH_(3) - overset(Theta)( C) H_(2) gt CH_(2) = overset(Theta) ( C) H gt CH = overset(Theta) ( C)`
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