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Question

How many parts of hydrochloric acid is present in a mixture of aqua regia?
  1. 3

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Solution

The correct option is A 3
Aqua regia is a mixture of hydrochloric acid and nitric acid present in the ratio 3:1, i.e. the volume of solution is 3 parts of hydrochloric acid and 1 part of nitric acid.

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