Statement I : When 0.1M weak diprotic acid H2A dissociates with its dissociation constants Ka1 = 10-3 and Ka2 =10-8 and , then [A–2] is almost equal to 10–3M.Statement II : Since Ka2<

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Statement I and II are correct

Statement I is correct and Statement II is incorrect

Statement - I is incorrect and Statement II is correct

Both statement - I and statement - II are False

answer is D.

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Detailed Solution

H2AC0-x⇌HA-x-y+H+x+y;Ka1=x×xC0HA-x-y⇌Ay-2+Hy+x+;Ka2=x×yxKa1≫Ka2⇒x≫y⇒y=Ka2 Also, C0≫x⇒A-2≅Ka2

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