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Statement I: Solubility of NaCl is more in D₂O than in water
Statement II : Molecular weight of D₂O is more than that of water

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Statement I and Statement II are true.

Statement I is true and statement II is false.

Statement I is false and Statement II is true.

Statement I and Statement II are false.

answer is C.

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Detailed Solution

→Dielectric constant is a measure of ionisation of ionic bond.
The solubility of NaCl in water & D2O depends upon the dielectric constant of H2O ,D2O

Dielectric Constant(D) : D2O < H2O

As the dielectric constant of solvent ↑es,Solubility increase
→ Therefore, NaCl is more soluble in H₂O than in D₂O
Since

D_{D_{2} O} < D_{H_{2} O}

Statement -I Wrong
→Molecular weight: D₂O > H₂O
Statement -II correct

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