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 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?
-
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?
-
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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Q. Which of the following measures is NOT a measure of dispersion?
-
A.
Range
-
B.
Variance
-
C.
Mean
-
D.
Standard Deviation
Solution
Mean is a measure of central tendency, not dispersion.
Correct Answer: C — Mean
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Q. Which of the following measures of dispersion is affected by extreme values?
-
A.
Range
-
B.
Interquartile Range
-
C.
Variance
-
D.
Standard Deviation
Solution
Range is affected by extreme values as it is calculated as the difference between the maximum and minimum values.
Correct Answer: A — Range
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Q. Which of the following metals can be used as an anode in a Daniell cell?
-
A.
Copper
-
B.
Zinc
-
C.
Silver
-
D.
Lead
Solution
Zinc is used as the anode in a Daniell cell.
Correct Answer: B — Zinc
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Q. Which of the following metals can be used as an anode in electrolysis?
-
A.
Copper
-
B.
Gold
-
C.
Aluminum
-
D.
Silver
Solution
Aluminum is commonly used as an anode in electrolysis due to its high reactivity.
Correct Answer: C — Aluminum
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Q. Which of the following metals cannot be used as an anode in a galvanic cell?
-
A.
Zinc
-
B.
Copper
-
C.
Lead
-
D.
Silver
Solution
Copper cannot be used as an anode in a galvanic cell because it is less reactive than zinc.
Correct Answer: B — Copper
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Q. Which of the following molecular orbitals is filled first according to the Aufbau principle?
-
A.
σ1s
-
B.
σ*1s
-
C.
π2p
-
D.
σ2p
Solution
According to the Aufbau principle, the σ1s molecular orbital is filled first as it has the lowest energy.
Correct Answer: A — σ1s
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Q. Which of the following molecular orbitals is lower in energy than the 2p atomic orbitals?
-
A.
σ2s
-
B.
σ*2s
-
C.
π2p
-
D.
σ2p
Solution
σ2s is lower in energy than the 2p atomic orbitals.
Correct Answer: A — σ2s
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Q. Which of the following molecules exhibits resonance?
-
A.
H2O
-
B.
CO2
-
C.
O3
-
D.
CH4
Solution
Ozone (O3) exhibits resonance due to the delocalization of electrons.
Correct Answer: C — O3
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Q. Which of the following molecules has a bent shape according to VSEPR theory?
-
A.
CO2
-
B.
H2O
-
C.
NH3
-
D.
CH4
Solution
H2O has two bonding pairs and two lone pairs, leading to a bent molecular geometry.
Correct Answer: B — H2O
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Q. Which of the following molecules has a bent shape?
-
A.
CO2
-
B.
H2O
-
C.
NH3
-
D.
CH4
Solution
H2O has two bonding pairs and two lone pairs, leading to a bent molecular geometry.
Correct Answer: B — H2O
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Q. Which of the following molecules has a bond order of 1?
-
A.
H2
-
B.
He2
-
C.
Li2
-
D.
B2
Solution
Li2 has a bond order of 1, calculated as (2 bonding electrons - 0 antibonding electrons)/2 = 1.
Correct Answer: C — Li2
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Q. Which of the following molecules has a bond order of 2?
Solution
N2 has a bond order of 2, calculated as (number of bonding electrons - number of antibonding electrons)/2 = (10-6)/2 = 2.
Correct Answer: B — N2
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Q. Which of the following molecules has a higher bond order than N2?
Solution
O2 has a bond order of 2, while N2 has a bond order of 3, so none have a higher bond order than N2.
Correct Answer: A — O2
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Q. Which of the following molecules has a higher bond order: N2 or O2?
-
A.
N2
-
B.
O2
-
C.
Both are equal
-
D.
Cannot be determined
Solution
N2 has a bond order of 3, while O2 has a bond order of 2, so N2 has a higher bond order.
Correct Answer: A — N2
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Q. Which of the following molecules has a linear shape?
-
A.
CH4
-
B.
H2O
-
C.
CO2
-
D.
NH3
Solution
CO2 has a linear shape due to the arrangement of its double bonds.
Correct Answer: C — CO2
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Q. Which of the following molecules has a trigonal bipyramidal geometry?
-
A.
NH3
-
B.
PCl5
-
C.
H2O
-
D.
CO2
Solution
PCl5 has five bonding pairs and no lone pairs, leading to a trigonal bipyramidal geometry.
Correct Answer: B — PCl5
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