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NEST2019Chemistryp Block Elements (Group 15, 16, 17 & 18)

When a mixture of NaCl , conc. H ₂ SO ₄ and K ₂ Cr ₂ O ₇ is heated, red vapours of compound X are formed. These vapours dissolve in aqueous NaOH to form a yellow solution, which upon treatment with AgNO ₃ gives a red solid (Y). X and Y respectively are

Options

  1. ACrO ₂ Cl ₂ and Ag ₂ CrO ₄
  2. BNa ₂ CrO ₄ and Ag ₂ Cr ₂ O ₇
  3. CCrO ₂ Cl ₂ and Ag ₂ Cr ₂ O ₇
  4. DNa ₂ CrO ₄ and Ag ₂ CrO ₄

Correct answer

A. CrO ₂ Cl ₂ and Ag ₂ CrO ₄

Step-by-step solution

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