Question

The decasing nucleophilic order of the following compounds is:
i. `H_(2)O`, ii. `H_(2)S`, iii. `H_(2)Se`, iv. `H_(2)Te`
A. `(i) gt (ii) gt (iii) gt (iv)`
B. `(iv) gt (iii) gt (ii) gt (i)`
C. `(iiii) gt (i) gt (ii) gt (iv)`
D. `(iv) gt (ii) gt (i) gt (iii)`

Answer 1

Correct Answer - `b`
Basically and nucleophilicity orders are reversed, Have different nucleophilic centre and belong to the same group.
Nuclophillcity: `H_(2)O Te gt H_(2)Se gt H_(2)S gt H_(2)Te`