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Question (1)

QN002771

Which of the following is mainly used in making electrical wires because of its conductivity?

(A) Sulfur
(B) Copper
(C) Oxygen
(D) Carbon

Correct Answer: B

Explanation:

Copper is a very good conductor of electricity.

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Question (2)

QN002772

Stainless steel is widely used for kitchen utensils because it is

(A) soft and brittle
(B) highly reactive
(C) resistant to rusting
(D) a pure element

Correct Answer: C

Explanation:

Stainless steel resists corrosion and rusting.

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Question (3)

QN002773

Which compound is commonly used in fertilizers to improve crop growth?

(A) Sodium chloride
(B) Urea
(C) Carbon dioxide
(D) Sulfur

Correct Answer: B

Explanation:

Urea is widely used as a nitrogen fertilizer.

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Question (4)

QN002774

Brass is commonly used in musical instruments because it

(A) breaks easily
(B) produces good sound quality
(C) melts at room temperature
(D) is non-metallic

Correct Answer: B

Explanation:

Brass gives clear and resonant sound.

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Question (5)

QN002775

Which of the following is an example of using a mixture in daily life?

(A) Oxygen cylinder
(B) Distilled water
(C) Concrete
(D) Gold bar

Correct Answer: C

Explanation:

Concrete is a mixture of cement, sand, gravel, and water.

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Question (6)

QN002776

Concrete is mainly a mixture of

(A) iron and sulfur
(B) cement, sand, gravel, and water
(C) copper and zinc
(D) sodium and chlorine

Correct Answer: B

Explanation:

Concrete contains cement, sand, gravel, and water.

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Question (7)

QN002777

Bronze statues are durable mainly because bronze is

(A) a weak metal
(B) an alloy resistant to corrosion
(C) a liquid compound
(D) a gas mixture

Correct Answer: B

Explanation:

Bronze does not corrode easily.

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Question (8)

QN002778

Which gas is filled in electric bulbs to protect the filament?

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

Correct Answer: C

Explanation:

Argon prevents the filament from reacting quickly.

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Question (9)

QN002779

A farmer adds compost to soil mainly to

(A) reduce oxygen
(B) increase fertility
(C) remove nitrogen
(D) convert soil into an element

Correct Answer: B

Explanation:

Compost improves soil nutrients and fertility.

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Question (10)

QN002780

Which element is used in pencil “lead”?

(A) Iron
(B) Graphite
(C) Zinc
(D) Sulfur

Correct Answer: B

Explanation:

Pencil lead is made of graphite, a form of carbon.

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Question (1)

Which of the following is mainly used in making electrical wires because of its conductivity?

Explanation:

Link:

Question (2)

Stainless steel is widely used for kitchen utensils because it is

Explanation:

Link:

Question (3)

Which compound is commonly used in fertilizers to improve crop growth?

Explanation:

Link:

Question (4)

Brass is commonly used in musical instruments because it

Explanation:

Link:

Question (5)

Which of the following is an example of using a mixture in daily life?

Explanation:

Link:

Question (6)

Concrete is mainly a mixture of

Explanation:

Link:

Question (7)

Bronze statues are durable mainly because bronze is

Explanation:

Link:

Question (8)

Which gas is filled in electric bulbs to protect the filament?

Explanation:

Link:

Question (9)

A farmer adds compost to soil mainly to

Explanation:

Link:

Question (10)

Which element is used in pencil “lead”?

Explanation:

Link:

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