7(i)
Give reasons for the following:
(a) Nitric acid does not normally liberate hydrogen gas when it reacts with active metals.
(b) Silver-plated cutlery is not considered as pure silver.
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(a) Nitric Acid is a very strong oxidising agent and hence oxidises hydrogen to water. So, it is not used for obtaining hydrogen from metals.
(b) Silver plated cutlery is not considered as pure silver because it is not made fully of silver only its top coating is of silver.