Q27 / 90 · JEE Main 2019 (09 Apr Shift 1) · Chemistry

Magnesium powder burns in air to give

Correct answer
A
$M g O a n d M g_{3} N_{2}$ .
B
$M g O o n l y$ .
C
$M g {(N O_{3})}_{2} a n d M g_{3} N_{2}$ .
D
$M g O a n d M g {(N O_{3})}_{2}$ .

Solution

$N_{2}$ and $O_{2}$ are present in the air as the main constituent, so the following reaction takes place:

$Mg + O_{2} \to M gO, M g + N_{2} \to M g_{3} N_{2}$ will form.

Hence, the correct answer is option: 'A'.

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