Q.

The 17th group hydride having positive pKa value is

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a

HI

b

HCl

c

HF

d

HBr

answer is C.

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Detailed Solution

Acidic strength of  HI > HBr > HCl > HFHI, HBr, HCl…..strong acid,…..pka = -veHF …Weak acid ….Pka = +ve
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The 17th group hydride having positive pKa value is