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Most Important Selected Qs for JEE AdvancedChemistryp Block Elements (Group 15, 16, 17 & 18)

How many of the following produce N ₂ on being heated? (a) ( NH ₄ )₂ SO ₄ (b) NH ₄ NO ₂ (c) NH ₄ NO ₃ (d) Ba ( N ₃ )₂ (e) NaN ₃ (f) NH ₄ ClO ₄ (g) ( NH ₄ )₂ Cr ₂ O ₇ (h) Pb ( NO ₃ )₂

Correct answer

5

Step-by-step solution

array ll ( NH ₄ )₂ SO ₄ & 2 NH ₃ + SO ₃( ~g ) + H ₂ O ( NH ₄ ) NO ₂ & ~N ₂ +2 H ₂ O ( NH ₄ ) NO ₃ & ~N ₂ O +2 H ₂ O Ba ( N ₃ )₂ & Ba +3 ~N ₂ 2 NH ₄ ClO ₄ & ~N ₂ + Cl ₂+4 H ₂ O +2 O ₂ ( NH ₄ )₂ Cr ₂ O ₇ & ~N ₂ +4 H ₂ O + Cr ₂ O ₃ & ~Pb ( NO ₃ )₂ & PbO +2 NO ₂+ 1 2 O ₂ 2 NaN ₃ & 2 Na +3 ~N ₂ array

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