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Subjects
Science State Board
Class 10
Atoms and Molecules
Textbook questions

1. Choose the best answer I

Exercise condition:

5 m.

1. Which of the following has the smallest mass?

\(6.023\times10^{23}\) atoms of \(He\)
\(1\) atom of \(He\)
\(2\) \(g\) of \(He\)
\(1\) \(mole\) atoms of \(He\)

2. Which of the following is a triatomic molecule?

Hydrogen
Carbon dixode
Helium
Glucose

3. The volume occupied by \(4.4\) \(g\) of \(CO_2\) at STP

\(2.24\) \(litre\)
\(22.4\) \(litre\)
\(0.24\) \(litre\)
\(0.1\) \(litre\)

4. Mass of \(1\) \(mole\) of nitrogen atom is

\(14\) \(amu\)
\(14\) \(g\)
\(28\) \(amu\)
\(28\) \(g\)

5. Which of the following represents \(1\) \(amu\)?

Mass of a \(C –12\) atom
\(1/12\)th of the mass of a \(C –12\) atom
Mass of \(O –16\) atom
Mass of a hydrogen atom

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