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Question (11)

QN007321

The bond formed by sharing of electrons is called:

(A) Ionic bond
(B) Covalent bond
(C) Electrovalent bond
(D) Nuclear bond

Correct Answer: B

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Question (12)

QN007322

Which molecule is formed through covalent bonding?

(A) NaCl
(B) MgO
(C) H₂O
(D) KCl

Correct Answer: C

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Question (13)

QN007323

Sodium has electronic configuration 2,8,1. Its valency is:

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

Correct Answer: B

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Question (14)

QN007324

Oxygen has electronic configuration 2,6. Its valency is:

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

Correct Answer: B

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Question (15)

QN007325

Magnesium has electronic configuration 2,8,2. It forms ion by:

(A) Gaining two electrons
(B) Sharing two electrons
(C) Losing two electrons
(D) Losing one electron

Correct Answer: C

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Question (16)

QN007326

The valency of aluminium with electronic configuration 2,8,3 is:

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

Correct Answer: C

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Question (17)

QN007327

Which of the following atoms tends to gain electrons?

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

Correct Answer: C

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Question (18)

QN007328

The combining capacity of an atom is known as:

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

Correct Answer: C

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Question (19)

QN007329

The valency of neon is:

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

Correct Answer: D

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Question (20)

QN007330

Calcium has electronic configuration 2,8,8,2. Its valency is:

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

Correct Answer: B

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