Q. Which of the following is a property of heavy water (D2O)?
-
A.
It is lighter than regular water
-
B.
It has a higher boiling point than regular water
-
C.
It is more reactive than regular water
-
D.
It is less dense than regular water
Solution
Heavy water (D2O) has a higher boiling point than regular water (H2O).
Correct Answer: B — It has a higher boiling point than regular water
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Q. Which of the following is a property of heavy water?
-
A.
It is lighter than regular water
-
B.
It has a higher boiling point than regular water
-
C.
It is more reactive than regular water
-
D.
It is less dense than regular water
Solution
Heavy water (D2O) has a higher boiling point than regular water (H2O).
Correct Answer: B — It has a higher boiling point than regular water
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Q. Which of the following is a property of hydrogen chloride (HCl)?
-
A.
It is a gas at room temperature
-
B.
It is a strong base
-
C.
It is insoluble in water
-
D.
It has a high boiling point
Solution
Hydrogen chloride (HCl) is a gas at room temperature and is highly soluble in water.
Correct Answer: A — It is a gas at room temperature
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Q. Which of the following is a property of hydrogen chloride gas?
-
A.
It is a strong base
-
B.
It is a colorless gas
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C.
It is insoluble in water
-
D.
It is a non-polar molecule
Solution
Hydrogen chloride (HCl) is a colorless gas that is soluble in water.
Correct Answer: B — It is a colorless gas
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Q. Which of the following is a property of hydrogen gas?
-
A.
It is a good conductor of electricity
-
B.
It is colorless and odorless
-
C.
It is denser than air
-
D.
It supports combustion
Solution
Hydrogen gas is colorless and odorless.
Correct Answer: B — It is colorless and odorless
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Q. Which of the following is a property of hydrogen?
-
A.
It is a metal
-
B.
It is a non-metal
-
C.
It is a noble gas
-
D.
It is a liquid at room temperature
Solution
Hydrogen is classified as a non-metal.
Correct Answer: B — It is a non-metal
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Q. Which of the following is a property of intrinsic semiconductors? (2023)
-
A.
Doped with impurities
-
B.
High conductivity
-
C.
Pure form
-
D.
Low melting point
Solution
Intrinsic semiconductors are in their pure form without any doping.
Correct Answer: C — Pure form
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Q. Which of the following is a property of ionic compounds?
-
A.
They have low melting points.
-
B.
They conduct electricity in solid state.
-
C.
They are soluble in water.
-
D.
They are malleable.
Solution
Ionic compounds are generally soluble in water due to the strong interactions between ions and water molecules.
Correct Answer: C — They are soluble in water.
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Q. Which of the following is a property of ketones? (2020)
-
A.
More reactive than aldehydes
-
B.
Less polar than aldehydes
-
C.
Higher boiling points than aldehydes
-
D.
None of the above
Solution
Ketones are generally less polar than aldehydes due to the absence of a hydrogen atom attached to the carbonyl carbon.
Correct Answer: B — Less polar than aldehydes
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Q. Which of the following is a property of lanthanide contraction?
-
A.
Increase in atomic size
-
B.
Decrease in ionization energy
-
C.
Increase in electronegativity
-
D.
Decrease in atomic radius
Solution
Lanthanide contraction refers to the decrease in atomic radius across the lanthanide series due to poor shielding of f-electrons.
Correct Answer: D — Decrease in atomic radius
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Q. Which of the following is a property of lanthanides?
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A.
High density
-
B.
Low melting point
-
C.
Non-magnetic
-
D.
Colorless
Solution
Lanthanides are known for their high density and are typically metallic in nature.
Correct Answer: A — High density
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Q. Which of the following is a property of metals?
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A.
Brittle
-
B.
Good conductors of heat
-
C.
Poor conductors of electricity
-
D.
Dull appearance
Solution
Metals are typically good conductors of heat and electricity and have a shiny appearance.
Correct Answer: B — Good conductors of heat
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Q. Which of the following is a property of noble gases?
-
A.
Highly reactive
-
B.
Colorless and odorless
-
C.
Form strong acids
-
D.
Good conductors of electricity
Solution
Noble gases are colorless and odorless under standard conditions.
Correct Answer: B — Colorless and odorless
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Q. Which of the following is a property of non-metals?
-
A.
Good conductors of heat
-
B.
Malleable
-
C.
Brittle
-
D.
Ductile
Solution
Non-metals are generally brittle in solid form and do not exhibit malleability or ductility.
Correct Answer: C — Brittle
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Q. Which of the following is a property of p-block metals?
-
A.
High density
-
B.
Low melting point
-
C.
Good electrical conductivity
-
D.
Brittle
Solution
P-block metals, such as Lead and Tin, are generally brittle.
Correct Answer: D — Brittle
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Q. Which of the following is a property of similar triangles?
-
A.
Their corresponding angles are equal.
-
B.
Their corresponding sides are equal.
-
C.
They have the same area.
-
D.
They are congruent.
Solution
Similar triangles have equal corresponding angles, but their sides are in proportion, not necessarily equal.
Correct Answer: A — Their corresponding angles are equal.
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Q. Which of the following is a property of the p-block element carbon?
-
A.
Good conductor of electricity
-
B.
Forms strong ionic bonds
-
C.
Can form multiple bonds
-
D.
High density
Solution
Carbon can form multiple bonds, such as double and triple bonds, due to its tetravalency.
Correct Answer: C — Can form multiple bonds
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Q. Which of the following is a property of transition metals?
-
A.
They have completely filled d-orbitals
-
B.
They form only ionic compounds
-
C.
They exhibit variable oxidation states
-
D.
They are all paramagnetic
Solution
Transition metals exhibit variable oxidation states due to the involvement of d-electrons in bonding.
Correct Answer: C — They exhibit variable oxidation states
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Q. Which of the following is a purely imaginary number?
-
A.
2 + 3i
-
B.
0
-
C.
4
-
D.
0 + 5i
Solution
A purely imaginary number has no real part, so 0 + 5i is purely imaginary.
Correct Answer: D — 0 + 5i
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Q. Which of the following is a purine? (2019)
-
A.
Cytosine
-
B.
Thymine
-
C.
Adenine
-
D.
Uracil
Solution
Adenine is a purine, which is one of the two types of nitrogenous bases in nucleic acids.
Correct Answer: C — Adenine
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Q. Which of the following is a real-time operating system?
-
A.
Windows 10
-
B.
Linux
-
C.
RTOS
-
D.
macOS
Solution
RTOS stands for Real-Time Operating System.
Correct Answer: C — RTOS
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Q. Which of the following is a redox reaction? (2019)
-
A.
2H2 + O2 → 2H2O
-
B.
NaCl → Na + Cl2
-
C.
H2 + Cl2 → 2HCl
-
D.
CaCO3 → CaO + CO2
Solution
In the reaction 2H2 + O2 → 2H2O, hydrogen is oxidized and oxygen is reduced, making it a redox reaction.
Correct Answer: A — 2H2 + O2 → 2H2O
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Q. Which of the following is a reducing agent for aldehydes?
-
A.
H2
-
B.
KMnO4
-
C.
Na2Cr2O7
-
D.
HCl
Solution
Hydrogen gas (H2) can act as a reducing agent for aldehydes, converting them to alcohols.
Correct Answer: A — H2
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Q. Which of the following is a reducing agent in the reaction 2CuO + C → 2Cu + CO2?
Solution
C is the reducing agent as it donates electrons to reduce CuO to Cu.
Correct Answer: B — C
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Q. Which of the following is a reducing agent in the reaction 2MnO4- + 5C2O4^2- + 16H+ → 2Mn^2+ + 10CO2 + 8H2O? (2020)
-
A.
MnO4-
-
B.
C2O4^2-
-
C.
H+
-
D.
CO2
Solution
C2O4^2- (oxalate ion) is oxidized to CO2, thus it acts as a reducing agent in this reaction.
Correct Answer: B — C2O4^2-
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Q. Which of the following is a reducing agent that can reduce ketones?
-
A.
H2/Pd
-
B.
KMnO4
-
C.
Na2Cr2O7
-
D.
AgNO3
Solution
H2 in the presence of palladium (Pd) is a reducing agent that can reduce ketones to alcohols.
Correct Answer: A — H2/Pd
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Q. Which of the following is a reducing sugar?
-
A.
Fructose
-
B.
Sucrose
-
C.
Starch
-
D.
Cellulose
Solution
Fructose is a reducing sugar, while sucrose, starch, and cellulose are not.
Correct Answer: A — Fructose
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Q. Which of the following is a renewable energy source?
-
A.
Coal
-
B.
Natural Gas
-
C.
Solar Energy
-
D.
Nuclear Energy
Solution
Solar energy is a renewable energy source that can be harnessed without depleting natural resources.
Correct Answer: C — Solar Energy
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Q. Which of the following is a renewable source of energy that helps reduce environmental pollution?
-
A.
Coal
-
B.
Natural gas
-
C.
Solar energy
-
D.
Nuclear energy
Solution
Solar energy is a renewable source of energy that helps reduce environmental pollution compared to fossil fuels.
Correct Answer: C — Solar energy
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Q. Which of the following is a renewable source of energy?
-
A.
Coal
-
B.
Natural gas
-
C.
Solar energy
-
D.
Nuclear energy
Solution
Solar energy is a renewable source of energy that can be harnessed without depleting natural resources.
Correct Answer: C — Solar energy
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