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Q.

In the hydrides of VI A group elements, the acidic strength gradually increases from top to bottom. This is due to

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a

increase in their Ka values

b

increase in the m.p. of chalcogen

c

increase in the metallic strength of chalcogen

d

decrease in the EN of the chalcogens

answer is B.

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Detailed Solution

  Due to the decreasing bond dissociation enthalpy, acidic character of group 16 elements increases down the group. H2O < H2S < H2Se < H 2Te.

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