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Reactivity Trends (Group 2)

Magnesium com...

Question

Magnesium combines with nitrogen to form a nitride, which reacts with water to form a colourless gas. The gas is:

A

N H_{3}

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B

N_{2} O

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C

N O

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D

N O_{2}

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Solution

The correct option is A $N H_{3}$
Reaction of magnesium with nitrogen is as follows:
$M g + N_{2} - - \to M g_{3} N_{2} Magnesium nitride 6 H_{2} O - -- \to 3 M g (O H)_{2} + 2 N H_{3}$

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