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What is the composition of aqua-regia that corrodes noble metals such as platinum, gold?(a) 3 parts of nitric acid and 1 part of hydrochloric acid(b) 3 parts of hydrochloric acid and 1 part of nitric acid(c) 1 part of hydrofluoric acid and 3 part of hydrochloric acid(d) 3 parts of hydrofluoric acid and 1 part of hydrochloric acidThe question was asked in an online interview.This intriguing question comes from Materials in portion Materials of Corrosion Engineering

Answer»

The correct answer is (b) 3 parts of HYDROCHLORIC ACID and 1 PART of nitric acid

The explanation: The COMPOSITION of aqua regia is 3 parts of hydrochloric acid and 1 part of nitric acid. It corrodes/dissolves NOBLE metals such as gold, platinum, and palladium.



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