Why is nitric acid cannot be used in the preparation of hydrogen sulphide?
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The nitric oxide produced may react with atmospheric oxygen to give nitrogen dioxide. ... Some precious metals, such as pure gold and platinum-group metals do not react with nitric acid, though pure gold does react with aqua regia, a mixture of concentrated nitric acid and hydrochloric acid.
anshi74:
thanx
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because it reacts with atmospheric oxygen
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