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Question (21)

QN006782

Rutherford’s model failed to explain —

(A) Existence of electrons
(B) Neutrality of atom
(C) Stability of atom
(D) Presence of nucleus

Correct Answer: C

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Question (22)

QN006783

According to classical theory, a moving electron revolving around nucleus should —

(A) Gain mass
(B) Lose energy continuously
(C) Become neutral
(D) Stop moving instantly

Correct Answer: B

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Question (23)

QN006784

If electrons continuously lost energy, atoms would eventually —

(A) Expand
(B) Explode
(C) Collapse
(D) Become radioactive

Correct Answer: C

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Question (24)

QN006785

Rutherford discovered the positively charged particle called —

(A) Electron
(B) Neutron
(C) Proton
(D) Nucleon

Correct Answer: C

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Question (25)

QN006786

For an electrically neutral atom, the number of protons is always equal to the number of —

(A) Neutrons
(B) Electrons
(C) Shells
(D) Nuclei

Correct Answer: B

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Question (26)

QN006787

A helium atom contains 2 protons. The number of electrons in a neutral helium atom is —

(A) 0
(B) 1
(C) 2
(D) 4

Correct Answer: C

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Question (27)

QN006788

Bohr proposed his atomic model in —

(A) 1808
(B) 1897
(C) 1911
(D) 1913

Correct Answer: D

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Question (28)

QN006789

According to Bohr, electrons move in fixed circular paths called —

(A) Clouds
(B) Stationary states
(C) Random paths
(D) Diffusion zones

Correct Answer: B

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Question (29)

QN006790

The shell closest to the nucleus is —

(A) L-shell
(B) M-shell
(C) N-shell
(D) K-shell

Correct Answer: D

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Question (30)

QN006791

In Bohr’s model, energy of shells —

(A) Decreases away from nucleus
(B) Remains same
(C) Increases away from nucleus
(D) Becomes zero

Correct Answer: C

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Question (21)

Rutherford’s model failed to explain —

Explanation:

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Question (22)

According to classical theory, a moving electron revolving around nucleus should —

Explanation:

Link:

Question (23)

If electrons continuously lost energy, atoms would eventually —

Explanation:

Link:

Question (24)

Rutherford discovered the positively charged particle called —

Explanation:

Link:

Question (25)

For an electrically neutral atom, the number of protons is always equal to the number of —

Explanation:

Link:

Question (26)

A helium atom contains 2 protons. The number of electrons in a neutral helium atom is —

Explanation:

Link:

Question (27)

Bohr proposed his atomic model in —

Explanation:

Link:

Question (28)

According to Bohr, electrons move in fixed circular paths called —

Explanation:

Link:

Question (29)

The shell closest to the nucleus is —

Explanation:

Link:

Question (30)

In Bohr’s model, energy of shells —

Explanation:

Link:

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