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Nitrogen

An orange sol...

Question

An orange solid (X) on heating, gives a colourless gas (Y) and a only green residue (Z). Gas (Y) on treatment with Mg, produceds a white solid substance................

M g_{3} N_{2}

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M g O

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M g_{2} O_{3}

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M g C l_{2}

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Solution

The correct option is A $M g_{3} N_{2}$
$(N H_{4})_{2} C r_{2} O_{7} \to N_{2} + C r_{2} O_{3} + 4 H_{2} O$
$3 M g + N_{2} \to M g_{3} N_{2}$
Orange solid is $(N H_{4})_{2} C r_{2} O_{7}$
Colourless gas is $N_{2}$
Green residue is $C r_{2} O_{3}$

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