NCERT Exemplar III — task. Science CBSE, Class 9.

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Answer the following multiple choice questions:

1. Which of the following would weigh the highest?

2 moles of $CaCO_3$
10 moles of $H_2$
0.2 mole of sucrose ( $C_1{_2}H_2{_2}O_1{_1}$ )
2 moles of $CO_2$

2. Which of the following has maximum number of atoms?

18g of $H_2$
18g of $CH_4$
18g of $O_2$
18g of $CO_2$

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