Multiple choice question XIII — task. Science CBSE, Class 10.

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1. Biogas is a mixture of:

$CO\ +\ H_2\ +\ CH_4$
$CO\ +\ H_2$
$CO_2\ +\ CH_4\ +\ H_2\ +\ H_2S$
$CO_2\ +\ N_2$

2. The sources of energy which are being produced continuously in nature and are inexhaustible are called:

conventional sources
non-conventional sources
non-renewable sources
none of these

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