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Q.

Statement I; Both the O-H bond enthaplies in Water molecule are equal.Statement II; H-H bond is shorter than D-D bond.

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a

Both statements I and II are correct

b

Statement I is correct and statement II is incorrect

c

Statement I is incorrect and statement II is correct

d

Both statements I and II are incorrect

answer is D.

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Detailed Solution

I)H2Og→OHg+Hg; ∆H=+502kJ;   OHg→Hg+Og;      ∆H=+427kJ; II) H-H bond length = D-D bond length=74 pm;
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