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JEE Main2018Chemistryp Block Elements (Group 15, 16, 17 & 18)Actual

The compound that does not produce nitrogen gas by thermal decomposition is:

Options

  1. AN H 4 2 S O 4
  2. BB a N 3 2
  3. CN H 4 2 C r 2 O 7
  4. DN H 4 N O 2

Correct answer

A. N H 4 2 S O 4

Step-by-step solution

(i) N H 4 2 C r 2 O 7   → Δ   C r 2 O 3 + N 2 + 4 H 2 O (ii) N H 4 N O 2   → Δ   N 2 + 2 H 2 O (iii) N H 4 2 S O 4   → Δ   2 N H 3 + H 2 S O 4 (iv) B a N 3 2   → Δ   B a + 3 N 2 In reaction (iii) N H 3 is evolved whereas in reaction 1, 2 and 4 N 2 is evolved.

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