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Option 4 : I and III only
The correct option is 4, i.e I and III only.
- Nitrogen is obtained by liquefaction and fractional distillation of air.
- Nitrogen is obtained by reacting an aqueous solution of Ammonium chloride with Sodium Nitrate. Hence, statement II is incorrect.
- Decomposition of Sodium or Barium Azide at high-temperature results in the formation of pure Nitrogen.
- Nitrogen is soluble in water. Hence, statement IV is incorrect
- It is used in the manufacturing of compounds like Ammonia and Calcium Cyanamide.
- Liquid Nitrogen is used as a food preservative and as a refrigerant.
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