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Reactivity with Air and Water (Group 2)

A metal A on ...

Question

A metal $A$ on heating in nitrogen gas gives compound $B$ . $B$ on treatment with $H_{2} O$ gives a colourless gas which when passed through $C u S O_{4}$ solution gives a dark blue-violet coloured solution. $A$ and $B$ respectively, are :

N a

and

N a_{3} N

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M g

and

M g_{3} N_{2}

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M g

and

M g (N O_{3})_{2}

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N a

and

N a N O_{3}

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Solution

The correct option is B $M g$ and $M g_{3} N_{2}$
As it is provided in the question that nitride is being formed so option $c$ and $d$ can be eliminated. Amongst $M g$ and $N a$ we know that $M g$ can only form nitride. So, the correct choice is option $a$ .
$3 M g + N_{2} \to M g_{3} N_{2} H_{2} O - - \to M g (O H)_{2} + N H_{3}$

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Similar questions

H_{2} O

C u S O_{4}

X

Y

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H_{2} O

C u S O_{4}

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X

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H_{2} O

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H_{2} O

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