The gas that helps to break down food in our body and thus release energy is
(a) oxygen.
(b) carbon dioxide.
(c) hydrogen.
(d) nitrogen.

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Solution

(a) oxygen
Food gets oxidised in presence of oxygen to release energy.

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The gas that helps to break down food in our body and thus release energy is (a) oxygen. (b) carbon dioxide. (c) hydrogen. (d) nitrogen.

(a) oxygenFood gets oxidised in presence of oxygen to release energy.

The gas that helps to break down food in our body and thus release energy is
(a) oxygen.
(b) carbon dioxide.
(c) hydrogen.
(d) nitrogen.

(a) oxygen
Food gets oxidised in presence of oxygen to release energy.