First slide

Water and Heavy water

Question

The O–H bond energy in water when compared to O–D bond energy in heavy water is

Easy

A

Greater
B

Lesser
C

Same
D

None

Solution

All physical constants OF: D₂O > H₂O
Reason: Physical properties $α$ Molecular mass
Exception: Dielectric costant: H₂O> D₂O
Dielectric constant is a measure of ionisation of a Salt by the solvent example:
$\large NaCl\xrightarrow{{{H_2}O}}\;N{a^ + } + C{l^ \circleddash }$

→Density: D₂O > H₂O
→Boiling point D₂O > H₂O
→ Latent heat of vapoursation : D₂O > H₂O
→ Dielectric constant : D₂O > D₂O.

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