First slide

Water and Heavy water

Question

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

Easy

A

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

Statement I and Statement II are false.

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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