AIIMS2019Chemistryp Block Elements (Group 15, 16, 17 & 18)
Assertion : Pure N ₂ is obtained from Ba ( N ₃ )₂ but not from ( NH ₄ )₂ Cr ₂ O ₇ . Reason : On decomposition, ( NH ₄ )₂ Cr ₂ O ₇ gives O ₂ gas.
Options
- AIf both assertion and reason are true and reason is the correct explanation of assertion.
- BIf both assertion and reason are true but reason is not the correct explanation of assertion.
- CIf assertion is true but reason is false.
- DIf both assertion and reason are false.
Correct answer
C. If assertion is true but reason is false.
Step-by-step solution
( NH ₄ )₂ Cr ₂ O ₇ N ₂+ Cr ₂ O ₃+4 H ₂ O Ba ( N ₃ )₂ Ba + (pure) 3 ~N ₂