Q.

Acidity of diprotic acids in aqueous solutions increases in the order

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a

H2 S

b

H2Se

c

H2Te

d

H2Se

answer is A.

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Detailed Solution

As the atomic size increases down the group, the bond length increases and the bond strength decreases and the cleavage of E-H bond becomes easier thus, more will be the acidity. Thus, the correct order is :H2 S
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