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KCET2018Chemistryp Block Elements (Group 15, 16, 17 & 18)

Very pure ( N ₂ ) can be obtained by

Options

  1. AThermal decomposition of ammonium dichromate
  2. BTreating aqueous solution of ( NH ₄ Cl ) and ( NaNO ₂ )
  3. CLiquifaction and fractional distillation of liquid air
  4. DThermal decomposition of sodium azide

Correct answer

D. Thermal decomposition of sodium azide

Step-by-step solution

By heating sodium azide, pure nitrogen can be obtained ( 2 N a N₃-->2 N a+3 N₂ ) Sodium a zide

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