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Q.

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

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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.

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 D2OSince  Statement -I Wrong→Molecular weight: D2O > H2O  Statement -II correct
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