9th Class Chemistry Chapter 2 MCQs with Answers

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9th Class Multiple Choice Question Chapter 2 with Answers Free PDF

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Grade 9 Chemistry Chapter 2 Online Quiz

By presenting 3 options to choose from, 9th Class Chapter 2 Quiz which cover a wide range of topics and levels of difficulty, making them adaptable to various learning objectives and preferences. You will have to read all the given answers of 9th Class Questions and Answers and click over the correct answer.

• Test Name: 9th Class Chemistry Chapter 2 Quiz Practice
• Type: Quiz Test
• Total Questions: 40
• Total Marks: 40
• Time: 40 minutes

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9th Class Chemistry Ch 2: Structure of Atoms

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1 / 40

Who proposed the planetary model of the atom?

Ernest Rutherford

J.J. Thomson

Niels Bohr

2 / 40

Who proposed the wave mechanical model of the atom?

Werner Heisenberg

Albert Einstein

Erwin Schrödinger

3 / 40

What is the maximum number of electrons in the p subshell?

2

6

8

4 / 40

What is the electron configuration of carbon?

1s² 2s² 2p³

1s² 2s³

1s² 2s² 2p²

5 / 40

What is the charge of a neutron?

1

-1

6 / 40

Which of the following is not found in the nucleus?

Neutron

Electron

Proton

7 / 40

What is the mass number of an element?

Number of protons

Number of electrons

Sum of protons and neutrons

8 / 40

Which subatomic particle has a negligible mass?

Electron

Proton

Neutron

9 / 40

Which subatomic particle determines the identity of an element?

Electron

Proton

Neutron

10 / 40

What is the charge of a proton?

-1

1

11 / 40

What is the principal quantum number range for an electron in the d subshell?

1 to 3

0 to 1

3 to ∞

12 / 40

Who proposed the plum pudding model of the atom?

Niels Bohr

J.J. Thomson

Ernest Rutherford

13 / 40

What is the electron configuration of oxygen?

1s² 2s² 2p³

1s² 2s³

1s² 2s² 2p⁴

14 / 40

Which scientist discovered the neutron?

Max Planck

Marie Curie

James Chadwick

15 / 40

What is the electron configuration of sodium?

1s² 2s¹

1s² 2s² 2p⁶

1s² 2s² 2p⁶ 3s¹

16 / 40

What is the Bohr radius?

Diameter of the nucleus

Distance from the nucleus to the electron in the first shell

Distance from the nucleus to the nucleus

17 / 40

What is the maximum number of electrons in the third shell?

2

8

18

18 / 40

What is the maximum number of electrons in the second shell?

18

2

8

19 / 40

What is the magnetic quantum number range for an orbital in the p subshell?

-3 to +3

-2 to +2

-1 to +1

20 / 40

What is the mass of an electron compared to a proton?

Much smaller

Much larger

Equal

21 / 40

What is the principal quantum number range for an electron in the p subshell?

0 to 1

2 to ∞

1 to 2

22 / 40

What is the shape of a p orbital?

Cubical

Spherical

Dumbbell-shaped

23 / 40

What is the magnetic quantum number range for an orbital in the s subshell?

-2 to +2

-1 to +1

24 / 40

What is the mass of a neutron?

0 amu

Same as electron

1 atomic mass unit (amu)

25 / 40

What is the maximum number of electrons in the first shell?

8

18

2

26 / 40

What is the principal quantum number range for an electron in the s subshell?

0 to 1

-1 to 0

1 to ∞

27 / 40

What is the atomic number of an element?

Number of electrons

Number of protons

Number of neutrons

28 / 40

What is the shape of a d orbital?

Spherical

Cloverleaf-shaped

Dumbbell-shaped

29 / 40

Which of the following is not true about electrons?

They orbit the nucleus

They are negatively charged

They are located in the nucleus

30 / 40

Which subatomic particle has a positive charge?

Neutron

Proton

Electron

31 / 40

What is the maximum number of electrons in an orbital?

6

2

4

32 / 40

What is the magnetic quantum number range for an orbital in the d subshell?

-3 to +3

-1 to +1

-2 to +2

33 / 40

What is the shape of an s orbital?

Spherical

Cubical

Dumbbell-shaped

34 / 40

Which quantum number determines the shape of an orbital?

Principal (n)

Magnetic (m)

Azimuthal (l)

35 / 40

Who proposed the quantum mechanical model of the atom?

Werner Heisenberg

Marie Curie

Max Planck

36 / 40

What is the shape of an f orbital?

Cloverleaf-shaped

Spherical

Dumbbell-shaped

37 / 40

Which of the following determines the mass of an atom?

Neutrons

Protons and neutrons

Electrons

38 / 40

Which subatomic particle is found in the nucleus?

Electron

Neutron

Proton

39 / 40

What is the charge of an electron?

-1

1

40 / 40

What is the mass of a proton?

Same as electron

1 atomic mass unit (amu)

0 amu

0%

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