A metal M on heating in nitrogen gas gives Y . Y on treatment with H ₂ O gives a colourless gas which when passed through CuSO ₄ solution gives a blue colour. Y is

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Correct answer: C. Mg ₃ ~N ₂

M 3 Mg + N ₂ Y Mg ₃ ~N ₂ aligned & Y Mg ₃ ~N ₂ +6 H ₂ O 3 Mg ( OH )₂+ colourless 2 NH ₃ & CuSO ₄+4 NH ₃ [ Cu ( NH ₃ )₄ ] SO ₄ & aligned Blue complex

A metal M on heating in nitrogen gas gives Y . Y on treatment with H ₂ O gives a colourless gas which when passed through CuSO ₄ solution gives a blue colour. Y is

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