1.

The decreasing basic order of the following compounds is: i. H_(2)O, ii. H_(2)S, iii. H_(2)Se, iv. H_(2)Te

Answer»

`(i) GT (ii) gt (iii) gt (iv)`
`(iv) gt (iii) gt (ii) gt (i)`
`(iiii) gt (i) gt (ii) gt (iv)`
`(iv) gt (ii) gt (i) gt (iii)`

Solution :The basic character FO hydrides of 16 GROUP decreases down the group. Size increases down the group and `LP overline(E)` density decreases.
Basic: `H_(2)O gt H_(2)S gt H_(2)Se gt H_(2)TE`


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