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Question (21)

QN00941

Oxides of non-metals are generally:

(A) Basic
(B) Neutral
(C) Acidic
(D) Metallic

Correct Answer: C

Explanation:

Most non-metal oxides are acidic.

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Question (22)

QN00942

Which substance behaves differently from metals when reacting with air and water?

(A) Iron
(B) Copper
(C) Sulfur
(D) Aluminium

Correct Answer: C

Explanation:

Sulfur is a non-metal.

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Question (23)

QN00943

What happens when sulfur powder is mixed with water?

(A) It reacts vigorously
(B) It forms a basic solution
(C) No reaction takes place
(D) It produces oxygen gas

Correct Answer: C

Explanation:

Sulfur does not react with water under normal conditions.

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Question (24)

QN00944

Phosphorus is stored in water because it:

(A) Dissolves in water quickly
(B) Catches fire in air
(C) Changes into metal oxide
(D) Produces hydrogen gas

Correct Answer: B

Explanation:

Phosphorus catches fire easily in air.

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Question (25)

QN00945

Which of the following is a non-metal?

(A) Magnesium
(B) Sodium
(C) Sulfur
(D) Zinc

Correct Answer: C

Explanation:

Sulfur is classified as a non-metal.

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Question (26)

QN00946

Non-metals are generally:

(A) Malleable and ductile
(B) Hard and sonorous
(C) Soft and dull in appearance
(D) Good conductors of electricity

Correct Answer: C

Explanation:

Non-metals are generally dull and brittle.

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Question (27)

QN00947

Which property is NOT shown by non-metals?

(A) Brittleness
(B) Poor conductivity
(C) Sonority
(D) Dull appearance

Correct Answer: C

Explanation:

Non-metals are generally non-sonorous.

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Question (28)

QN00948

Which of the following is a poor conductor of electricity?

(A) Copper
(B) Aluminium
(C) Sulfur
(D) Iron

Correct Answer: C

Explanation:

Sulfur is a poor conductor of electricity.

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Question (29)

QN00949

A student observes a substance that is dull, brittle, and non-sonorous. The substance is most likely a:

(A) Metal
(B) Alloy
(C) Non-metal
(D) Conductor

Correct Answer: C

Explanation:

These are properties of non-metals.

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Question (30)

QN00950

Which pair contains only non-metals mentioned in the chapter?

(A) Oxygen and nitrogen
(B) Iron and sulfur
(C) Copper and carbon
(D) Aluminium and oxygen

Correct Answer: A

Explanation:

Oxygen and nitrogen are non-metals.

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Question (21)

Oxides of non-metals are generally:

Explanation:

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Question (22)

Which substance behaves differently from metals when reacting with air and water?

Explanation:

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Question (23)

What happens when sulfur powder is mixed with water?

Explanation:

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Question (24)

Phosphorus is stored in water because it:

Explanation:

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Question (25)

Which of the following is a non-metal?

Explanation:

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Question (26)

Non-metals are generally:

Explanation:

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Question (27)

Which property is NOT shown by non-metals?

Explanation:

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Question (28)

Which of the following is a poor conductor of electricity?

Explanation:

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Question (29)

A student observes a substance that is dull, brittle, and non-sonorous. The substance is most likely a:

Explanation:

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Question (30)

Which pair contains only non-metals mentioned in the chapter?

Explanation:

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