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JEE Advanced2008Chemistryd and f Block ElementsActual

A solution of colourless salt H on boiling with excess NaOH produces a non-flammable gas. The gas evolution ceases after sometime. Upon addition of Zn dust to the same solution, the gas evolution restarts. The colourless salt (s) H is (are)

Options

  1. ANH ₄ NO ₃
  2. BNH ₄ NO ₂
  3. CNH ₄ Cl
  4. D( NH ₄ )₂ SO ₄

Correct answer

A. NH ₄ NO ₃

Step-by-step solution

aligned & NH ₄ NO ₃+ NaOH NaNO ₃+ NH ₃+ H ₂ O & NaNO ₃+8[ H ] NaOH + NH ₃+2 H ₂ O & NH ₄ NO ₂+ NaOH NaHO ₂+ NH ₃+ H ₂ O & NaNO ₂+6[ H ] NaOH + NH ₃+ H ₂ O aligned

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