A substance X burns vigorously in a jar of oxygen with a brick red flame to form its oxide 'Y' which is a white powder. Which substance is X ?

Carbon

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Calcium

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Sodium

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Sulphur

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Solution

The correct option is B
Calcium

Calcium burns quite vigorously in oxygen and strong heating is required to make it burn. It gives a brick red flame to produce a white powder of calcium oxide.
$C a l c i u m + o x y g e n \to c a l c i u m o x i d e$
$2 C a (s) + O_{2} (g) \to 2 C a O (s)$

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A substance X burns vigorously in a jar of oxygen with a brick red flame to form its oxide 'Y' which is a white powder. Which substance is X ?

The correct option is B Calcium Calcium burns quite vigorously in oxygen and strong heating is required to make it burn. It gives a brick red flame to produce a white powder of calcium oxide. Calcium+oxygen→calcium oxide 2Ca(s)+O2(g)→2CaO(s)

The correct option is B
Calcium

Calcium burns quite vigorously in oxygen and strong heating is required to make it burn. It gives a brick red flame to produce a white powder of calcium oxide.
$C a l c i u m + o x y g e n \to c a l c i u m o x i d e$
$2 C a (s) + O_{2} (g) \to 2 C a O (s)$