GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The single acid which dissolves gold is?
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Nitric acid
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Aqua regia
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Selenic acid
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Hydrochloric acid
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Explanation:
Detailed explanation-1: -Aqua regia is a mixture of hydrochloric acid and nitric acid in the ration 3:1. It is a very strong acid and can dissolve any metals including noble metals like gold and silver.
Detailed explanation-2: -Aqua regia (Latin for “Royal Water") is a solution of nitrohydrochloric acid. The traditional solution is comprised of a 3:1 mixture of hydrochloric acid and nitric acid, respectively.
Detailed explanation-3: -Dissolving Gold Aqua regia is used to dissolve gold. Neither nitric acid or hydrochloric acid can do this alone. Nitric acid will act as the oxidizer and is used to form gold ions (Au3+).
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