Major Competitive Exams
Q. Which of the following lanthanides is used in making strong permanent magnets?
-
A.
Cerium
-
B.
Neodymium
-
C.
Samarium
-
D.
Europium
Solution
Neodymium is used in making strong permanent magnets due to its magnetic properties.
Correct Answer: B — Neodymium
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Q. Which of the following ligands is a strong field ligand?
-
A.
I-
-
B.
Br-
-
C.
CN-
-
D.
Cl-
Solution
CN- is a strong field ligand and causes a large splitting of d-orbitals, leading to low-spin complexes.
Correct Answer: C — CN-
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Q. Which of the following ligands is a strong field ligand? (2021) 2021
-
A.
I-
-
B.
Br-
-
C.
CN-
-
D.
Cl-
Solution
CN- is a strong field ligand that causes a large splitting of d-orbitals, leading to low-spin complexes.
Correct Answer: C — CN-
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Q. Which of the following lines is parallel to the line 4x - 5y + 10 = 0?
-
A.
y = (4/5)x + 2
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B.
y = (5/4)x - 1
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C.
y = (4/5)x - 3
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D.
y = (-5/4)x + 1
Solution
The slope of the given line is 4/5. A line parallel to it must have the same slope, hence y = (4/5)x - 3.
Correct Answer: C — y = (4/5)x - 3
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Q. Which of the following liquids has the highest boiling point?
-
A.
Ethanol
-
B.
Water
-
C.
Benzene
-
D.
Hexane
Solution
Water has a higher boiling point due to strong hydrogen bonding.
Correct Answer: B — Water
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Q. Which of the following liquids has the highest surface tension at room temperature?
-
A.
Water
-
B.
Ethanol
-
C.
Mercury
-
D.
Benzene
Solution
Mercury has a very high surface tension due to strong cohesive forces between its molecules, higher than that of water, ethanol, and benzene.
Correct Answer: C — Mercury
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Q. Which of the following liquids has the highest surface tension?
-
A.
Water
-
B.
Ethanol
-
C.
Benzene
-
D.
Mercury
Solution
Mercury has the highest surface tension due to strong cohesive forces.
Correct Answer: D — Mercury
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Q. Which of the following liquids has the highest viscosity?
-
A.
Water
-
B.
Glycerol
-
C.
Ethanol
-
D.
Acetone
Solution
Glycerol is a thick liquid and has a higher viscosity compared to the others.
Correct Answer: B — Glycerol
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Q. Which of the following liquids has the lowest boiling point?
-
A.
Water
-
B.
Ethanol
-
C.
Benzene
-
D.
Hexane
Solution
Benzene has a lower boiling point compared to water, ethanol, and hexane.
Correct Answer: C — Benzene
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Q. Which of the following liquids is an example of a non-polar liquid?
-
A.
Water
-
B.
Ethanol
-
C.
Benzene
-
D.
Acetic acid
Solution
Benzene is a non-polar liquid, while the others are polar.
Correct Answer: C — Benzene
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Q. Which of the following liquids is considered a non-polar solvent?
-
A.
Water
-
B.
Ethanol
-
C.
Hexane
-
D.
Acetic acid
Solution
Hexane is a non-polar solvent, while the others are polar.
Correct Answer: C — Hexane
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Q. Which of the following liquids is most likely to exhibit strong hydrogen bonding?
-
A.
Hexane
-
B.
Ethanol
-
C.
Chloroform
-
D.
Acetone
Solution
Ethanol can form strong hydrogen bonds due to the presence of an -OH group.
Correct Answer: B — Ethanol
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Q. Which of the following liquids would have the lowest surface tension?
-
A.
Water
-
B.
Mercury
-
C.
Ethanol
-
D.
Oil
Solution
Ethanol has a lower surface tension compared to water and mercury due to its molecular structure.
Correct Answer: C — Ethanol
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Q. Which of the following materials can be used to polarize light?
-
A.
Glass
-
B.
Polaroid film
-
C.
Water
-
D.
Air
Solution
Polaroid film is specifically designed to polarize light by allowing only light waves oscillating in a certain direction to pass through.
Correct Answer: B — Polaroid film
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Q. Which of the following materials has the highest resistivity?
-
A.
Copper
-
B.
Aluminum
-
C.
Silver
-
D.
Rubber
Solution
Rubber is an insulator and has a much higher resistivity compared to metals like copper, aluminum, and silver.
Correct Answer: D — Rubber
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Q. Which of the following materials has the highest thermal resistance?
-
A.
Copper
-
B.
Aluminum
-
C.
Glass Wool
-
D.
Steel
Solution
Glass Wool has the highest thermal resistance among the given materials, making it a good insulator.
Correct Answer: C — Glass Wool
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Q. Which of the following materials has the highest Young's modulus?
-
A.
Rubber
-
B.
Steel
-
C.
Wood
-
D.
Plastic
Solution
Steel has a much higher Young's modulus compared to rubber, wood, and plastic, indicating it is much stiffer.
Correct Answer: B — Steel
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Q. Which of the following materials is a ferromagnetic material? (2020)
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A.
Copper
-
B.
Aluminum
-
C.
Iron
-
D.
Gold
Solution
Iron is a ferromagnetic material, which means it can be magnetized and has a high magnetic permeability.
Correct Answer: C — Iron
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Q. Which of the following materials is commonly used as a p-type semiconductor?
-
A.
Silicon
-
B.
Germanium
-
C.
Gallium Arsenide
-
D.
Boron-doped Silicon
Solution
Boron-doped Silicon is a common p-type semiconductor as boron creates holes in the silicon lattice.
Correct Answer: D — Boron-doped Silicon
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Q. Which of the following materials is commonly used as a semiconductor?
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A.
Copper
-
B.
Silicon
-
C.
Aluminum
-
D.
Iron
Solution
Silicon is widely used as a semiconductor material due to its suitable band gap and availability.
Correct Answer: B — Silicon
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Q. Which of the following materials is commonly used for potentiometer wires?
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A.
Copper
-
B.
Aluminum
-
C.
Constantan
-
D.
Silver
Solution
Constantan is commonly used for potentiometer wires due to its stable resistance over a range of temperatures.
Correct Answer: C — Constantan
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Q. Which of the following materials is commonly used for the wire in a potentiometer?
-
A.
Copper
-
B.
Aluminum
-
C.
Constantan
-
D.
Silver
Solution
Constantan is commonly used for potentiometer wires due to its stable resistance over a range of temperatures.
Correct Answer: C — Constantan
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Q. Which of the following materials is commonly used in polarizers?
-
A.
Glass
-
B.
Plastic
-
C.
Polaroid
-
D.
Water
Solution
Polaroid is a material specifically designed to polarize light.
Correct Answer: C — Polaroid
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Q. Which of the following materials is known to exhibit polarization?
-
A.
Glass
-
B.
Water
-
C.
Air
-
D.
Vacuum
Solution
Glass can exhibit polarization when light reflects off its surface.
Correct Answer: A — Glass
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Q. Which of the following materials is most likely to exhibit elastic behavior?
-
A.
Rubber
-
B.
Glass
-
C.
Steel
-
D.
Plastic
Solution
Steel is known for its elastic properties, allowing it to return to its original shape after deformation.
Correct Answer: C — Steel
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Q. Which of the following materials is the best conductor of heat?
-
A.
Wood
-
B.
Air
-
C.
Copper
-
D.
Glass
Solution
Copper is known for its excellent thermal conductivity, making it the best conductor among the given options.
Correct Answer: C — Copper
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Q. Which of the following materials is typically a good conductor of electricity?
-
A.
Rubber
-
B.
Copper
-
C.
Glass
-
D.
Wood
Solution
Copper is a good conductor of electricity, while rubber, glass, and wood are insulators.
Correct Answer: B — Copper
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Q. Which of the following materials transmits sound the fastest?
-
A.
Air
-
B.
Water
-
C.
Steel
-
D.
Wood
Solution
Sound travels fastest in solids like steel due to closely packed molecules.
Correct Answer: C — Steel
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Q. Which of the following materials typically has the highest Young's modulus?
-
A.
Rubber
-
B.
Steel
-
C.
Wood
-
D.
Plastic
Solution
Steel typically has a much higher Young's modulus compared to rubber, wood, and plastic.
Correct Answer: B — Steel
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Q. Which of the following materials would have the highest Young's modulus?
-
A.
Rubber
-
B.
Steel
-
C.
Wood
-
D.
Plastic
Solution
Steel has a much higher Young's modulus compared to rubber, wood, and plastic, indicating it is much stiffer.
Correct Answer: B — Steel
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