Q. Which of the following metals is used in making aircraft due to its lightweight? (2020)
-
A.
Lead
-
B.
Aluminum
-
C.
Iron
-
D.
Copper
Solution
Aluminum is widely used in aircraft manufacturing because of its lightweight and strength.
Correct Answer:
B
— Aluminum
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Q. Which of the following metals is used in making alloys?
-
A.
Mercury
-
B.
Tin
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C.
Bismuth
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D.
Lead
Solution
Tin is commonly used in making alloys, such as bronze when combined with copper.
Correct Answer:
B
— Tin
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Q. Which of the following metals is used in making electrical wires?
-
A.
Zinc
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B.
Copper
-
C.
Aluminum
-
D.
Iron
Solution
Copper is widely used in electrical wiring due to its excellent conductivity.
Correct Answer:
B
— Copper
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Q. Which of the following metals reacts vigorously with water?
-
A.
Copper
-
B.
Sodium
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C.
Iron
-
D.
Gold
Solution
Sodium reacts vigorously with water to produce sodium hydroxide and hydrogen gas.
Correct Answer:
B
— Sodium
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Q. Which of the following non-metals is a gas at room temperature?
-
A.
Phosphorus
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B.
Sulfur
-
C.
Chlorine
-
D.
Carbon
Solution
Chlorine is a non-metal that exists as a gas at room temperature.
Correct Answer:
C
— Chlorine
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Q. Which of the following non-metals is a good insulator? (2023)
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A.
Graphite
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B.
Sulfur
-
C.
Phosphorus
-
D.
Diamond
Solution
Diamond is a non-metal that is a good insulator due to its strong covalent bonds.
Correct Answer:
D
— Diamond
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Q. Which of the following non-metals is a key component of DNA?
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A.
Oxygen
-
B.
Nitrogen
-
C.
Carbon
-
D.
Hydrogen
Solution
Nitrogen is a key component of DNA, forming part of the nucleotides that make up the genetic code.
Correct Answer:
B
— Nitrogen
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Q. Which of the following non-metals is used in fertilizers?
-
A.
Nitrogen
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B.
Oxygen
-
C.
Helium
-
D.
Argon
Solution
Nitrogen is a key component in fertilizers, promoting plant growth.
Correct Answer:
A
— Nitrogen
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Showing 31 to 38 of 38 (2 Pages)
