Correct
statement : Ortho isomer -
one nuclear spin
Para isomer - zero nuclear spin
Assertion : Permanent hardness of water is removed
by treatment with washing soda.
mass of deuterium = 2 × mass of protium
If all the 1.2 g hydrogen is replaced with
deuterium, the weight will become 2.4g. Hence the increase in body weight is
(2.4 – 1.2 = 1.2 g)