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Question (21)

QN007082

Which of the following has valency 3?

(A) Aluminium
(B) Oxygen
(C) Sodium
(D) Chlorine

Correct Answer: A

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Question (22)

QN007083

An atom has electronic configuration 2, 6. Its valency is —

(A) 2
(B) 4
(C) 6
(D) 8

Correct Answer: A

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Question (23)

QN007084

The valency of phosphorus having configuration 2, 8, 5 is —

(A) 1
(B) 2
(C) 3
(D) 5

Correct Answer: C

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Question (24)

QN007085

Which element has valency equal to the number of valence electrons?

(A) Magnesium
(B) Sodium
(C) Chlorine
(D) Oxygen

Correct Answer: B

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Question (25)

QN007086

The combining capacity of an atom depends on —

(A) Total electrons
(B) Atomic mass
(C) Valence electrons
(D) Number of neutrons

Correct Answer: C

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Question (26)

QN007087

Which element has valency 2?

(A) Calcium
(B) Sodium
(C) Potassium
(D) Chlorine

Correct Answer: A

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Question (27)

QN007088

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

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

Correct Answer: B

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Question (28)

QN007089

The number of electrons lost, gained or shared by an atom determines its —

(A) Atomic number
(B) Mass number
(C) Valency
(D) Isotope

Correct Answer: C

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Question (29)

QN007090

Which of the following has the highest valency?

(A) Hydrogen
(B) Oxygen
(C) Carbon
(D) Nitrogen

Correct Answer: C

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Question (30)

QN007091

An atom with configuration 2, 8, 8 has valency —

(A) 0
(B) 1
(C) 2
(D) 8

Correct Answer: A

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