First slide

Water and Heavy water

Question

Which of the following is not true ?

Moderate

A

Ordinary water is electrolysed more rapidly than D₂O
B

Reaction between H₂ and Cl₂ is much faster than D₂ and Cl₂
C

D₂O freezes at lower temperature than H₂O
D

Bond dissociation energy for D₂is greater than H₂

Solution

$D_{2} O$ actually has higher freezing point $(3 . 8^{0} C)$ than water $H_{2} O$ $(0^{0} C)$ .

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