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

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Answer the following multiple choice questions:

1. Which of the following contains maximum number of molecules?

1g \(H_2\)
1g \(CO_2\)
1g \(N_2\)
1g \(CH_4\)

2. Mass of one atom of oxygen is

12 x \(6.023\) x \(10^2{^3}\) g
16 x \(6.023\) x \(10^2{^3}\) g
32 x \(6.023\) x \(10^2{^3}\) g
8 x \(6.023\) x \(10^2{^3}\) g

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