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Question (21)

QN007431

Which compound will conduct electricity in molten form?

(A) Methane
(B) Carbon dioxide
(C) Magnesium chloride
(D) Hydrogen gas

Correct Answer: C

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Question (22)

QN007432

Ionic compounds generally have high melting points because:

(A) Molecules are heavy
(B) Strong ionic attractions require more heat
(C) They absorb water easily
(D) Covalent bonds are weak

Correct Answer: B

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Question (23)

QN007433

Which compound is most likely insoluble in water?

(A) Sodium chloride
(B) Potassium nitrate
(C) Paraffin wax
(D) Copper sulfate

Correct Answer: C

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Question (24)

QN007434

Which statement about covalent compounds is correct?

(A) They conduct electricity in solid state
(B) They consist of ions
(C) They usually have weak intermolecular forces
(D) They always dissolve in water

Correct Answer: C

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Question (25)

QN007435

The conduction of electricity through ionic solutions is due to movement of:

(A) Atoms
(B) Molecules
(C) Electrons only
(D) Ions

Correct Answer: D

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Question (26)

QN007436

Which compound has ions arranged in crystal lattice?

(A) Methane
(B) Hydrogen chloride
(C) Sodium chloride
(D) Carbon monoxide

Correct Answer: C

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Question (27)

QN007437

Which of the following is soft and volatile?

(A) Sodium chloride
(B) Calcium oxide
(C) Carbon tetrachloride
(D) Magnesium chloride

Correct Answer: C

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Question (28)

QN007438

Covalent compounds generally have low melting points because:

(A) Molecules have weak intermolecular attraction
(B) Ionic bonds are absent
(C) Atoms have low mass
(D) They contain gases only

Correct Answer: A

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Question (29)

QN007439

Which property is shown by molten sodium chloride?

(A) Brittleness
(B) Electrical conductivity
(C) Insolubility in water
(D) Low density

Correct Answer: B

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Question (30)

QN007440

Which of the following is an example of covalent compound?

(A) CaCl₂
(B) K₂O
(C) CH₄
(D) Na₂S

Correct Answer: C

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Question (21)

Which compound will conduct electricity in molten form?

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Question (22)

Ionic compounds generally have high melting points because:

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Question (23)

Which compound is most likely insoluble in water?

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Question (24)

Which statement about covalent compounds is correct?

Explanation:

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Question (25)

The conduction of electricity through ionic solutions is due to movement of:

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Question (26)

Which compound has ions arranged in crystal lattice?

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Question (27)

Which of the following is soft and volatile?

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Question (28)

Covalent compounds generally have low melting points because:

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Question (29)

Which property is shown by molten sodium chloride?

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Question (30)

Which of the following is an example of covalent compound?

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