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Hydrogen chloride - class-XII

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Multiple Choice

When three parts of conc. HCl and one part of conc. $HNO _{3}$ is mixed, a compound 'X' is formed. The correct option related to 'X' is:

  1. 'X' is known as aqua-regia
  2. 'X' is used for dissolving gold
  3. 'X' is used for decomposition of salts of weaker acids
  4. both (a) and (b)
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