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Atoms and Molecules Book Back One Mark Online Test (10th Standard Science)

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Which of the following has the smallest mass?

A.\(6.023 \\times 10^{23}\) atoms of He B.1 atom of He C.2 g of He D.1 mole atoms of He

Which of the following is a triatomic molecule?

A.Glucose B.Helium C.Carbon dioxide D.Hydrogen

The volume occupied by 4.4 g of \(CO_2\) at S.T.P is

A.22.4 litre B.2.24 litre C.0.24 litre D.0.1 litre

Mass of 1 mole of Nitrogen atom is

A.28 amu B.14 amu C.28 g D.14 g

Which of the following represents 1 amu?

A.Mass of a C - 12 atom B.Mass of a hydrogen atom C.1/12th of the mass of a C - 12 atom D.Mass of O - 16 atom

Which of the following statements is incorrect?

A.12 gram of C - 12 contains Avogadro's number of atoms. B.One mole of oxygen gas contains Avogadro's number of molecules. C.One mole of hydrogen gas contains Avogadro's number of atoms. D.One mole of electrons stands for \(6.023 \\times 10^{23}\) electrons.

The volume occupied by 1 mole of a diatomic gas at S.T.P is

A.11.2 litre B.5.6 litre C.22.4 litre D.44.8 litre

In the nucleus of \(_{20}Ca^{40}\), there are

A.20 protons and 40 neutrons B.20 protons and 20 neutrons C.20 protons and 40 electrons D.40 protons and 20 electrons

The gram molecular mass of oxygen molecule is

A.16 g B.18 g C.32 g D.17 g

Q10

1 mole of any substance contains ______________ molecules.

A.\(6.023 \\times 10^{23}\) B.\(6.023 \\times 10^{-23}\) C.\(3.0115 \\times 10^{23}\) D.\(12.046 \\times 10^{23}\)

More for this chapter

Book Back Questions10 textbook MCQs · solved Additional MCQs15 extra MCQs · solved Practice TestInteractive · instant score Additional MCQ TestTest yourself on the extra set Study NotesConcepts & methods Formula SheetAll key formulas

About this Atoms and Molecules test

This free online practice test covers Atoms and Molecules from the 10th Standard Science (Samacheer Kalvi) syllabus. Choose the number of questions and an optional time limit, then answer and submit — everything is checked in your browser, with the correct answers and a worked explanation shown at the end. For the full solutions to every question in this set, see the solved MCQs page.

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