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NTA Abhyas JEE Main2020Chemistryp Block Elements (Group 15, 16, 17 & 18)Practice

Pure N 2 can be obtained by heating

Options

  1. AN H 4 N O 3
  2. BBa N 3 2
  3. CN H 4 2 C r 2 O 7
  4. DN H 3 with C u O

Correct answer

B. Ba N 3 2

Step-by-step solution

Metal nitrides on heating give pure nitrogen Ba N 3 2 → Δ Ba + 3 N 2 Ammonium nitrate on heating gives ammonia and not nitrogen N H 4 N O 3 → Δ N 2 O + 2 H 2 O N H 4 2 C r 2 O 7 → Δ N 2 impure + C r 2 O 3 + 4 H 2 O

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