Q.

Statement I : Both H2 and D2 have same internuclear distance
Statement II : Enthalpy of bond dissociation is same for H2 and D2

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a

Both Statement I and Statement II are true

b

Statement I is true and Statement II is false

c

Statement I is false and Statement II is true

d

Both Statement I and Statement II are false

answer is B.

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Detailed Solution

Statement I is true and Statement is false.

Heavier isotopes have high bond dissociation energy,

B.D.E : D-D > H-H

Internuclear distance : D-D ≈ H-H

Both H2 & D2 have same internuclear distance.

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