Gold cannot be dissolved by any acid. However, it can be dissolved by aqua regia (kingly water) which is a mixture of:

mineral water and Iodine

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nitric and hydrochloric acids

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water and sulphur

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alcohol and alum

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Solution

The correct option is B nitric and hydrochloric acids
Aqua regia is latin word used for 'royal water' and is a mixture of $H N O_{3}$ and $H C l$ optimally in a molal ratio 1:3. It can dissolve gold (noble metal) because the gold react only with the concentrated acid mixture.

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To make a mixture which can dissolve gold, nitric acid and hydrochloric acid are to be mixed in the ratio 3 : 1. With 12 milliliters of hydrochloric acid, how much nitric acid should be mixed?

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Gold cannot be dissolved by any acid. However, it can be dissolved by aqua regia (kingly water) which is a mixture of:

The correct option is B nitric and hydrochloric acidsAqua regia is latin word used for 'royal water' and is a mixture of HNO3 and HCl optimally in a molal ratio 1:3. It can dissolve gold (noble metal) because the gold react only with the concentrated acid mixture.

The correct option is B nitric and hydrochloric acids
Aqua regia is latin word used for 'royal water' and is a mixture of $H N O_{3}$ and $H C l$ optimally in a molal ratio 1:3. It can dissolve gold (noble metal) because the gold react only with the concentrated acid mixture.