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Question (41)

QN007102

The valency of oxygen is determined by its need to gain —

(A) 1 electron
(B) 2 electrons
(C) 4 electrons
(D) 6 electrons

Correct Answer: B

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Question (42)

QN007103

Which electronic configuration represents an element with valency zero?

(A) 2, 8, 1
(B) 2, 8, 7
(C) 2, 8, 8
(D) 2, 6

Correct Answer: C

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Question (43)

QN007104

The valency of aluminium is —

(A) 1
(B) 2
(C) 3
(D) 4

Correct Answer: C

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Question (44)

QN007105

An atom with one valence electron usually tends to —

(A) Gain one electron
(B) Lose one electron
(C) Gain two electrons
(D) Share eight electrons

Correct Answer: B

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Question (45)

QN007106

The valency of an atom with electronic configuration 2, 8, 6 is —

(A) 1
(B) 2
(C) 6
(D) 8

Correct Answer: B

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Question (46)

QN007107

Which statement about valency is correct?

(A) It depends on neutrons
(B) It depends on valence electrons
(C) It depends on mass number
(D) It depends on nucleus size

Correct Answer: B

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Question (47)

QN007108

An atom with valency 1 can combine with how many hydrogen atoms?

(A) One
(B) Two
(C) Three
(D) Four

Correct Answer: A

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Question (48)

QN007109

The valency of carbon in methane (CH₄) is —

(A) 1
(B) 2
(C) 3
(D) 4

Correct Answer: D

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Question (49)

QN007110

Which of the following best defines valency?

(A) Number of shells in an atom
(B) Total electrons in nucleus
(C) Combining capacity of an atom
(D) Total neutrons in atom

Correct Answer: C

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