Major Competitive Exams
Q. Which of the following is not a subset of {a, b, c}?
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A.
{a}
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B.
{b, c}
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C.
{a, b, c}
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D.
{d}
Solution
The set {d} does not contain any elements from {a, b, c}, so it is not a subset.
Correct Answer: D — {d}
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Q. Which of the following is not a transition metal?
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A.
Iron
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B.
Zinc
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C.
Copper
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D.
Nickel
Solution
Zinc is not considered a transition metal because it does not have an incomplete d subshell in its elemental state.
Correct Answer: B — Zinc
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Q. Which of the following is NOT a type of adsorption isotherm?
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A.
Langmuir
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B.
Freundlich
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C.
BET
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D.
Henry
Solution
Henry's law describes solubility, not adsorption, while Langmuir, Freundlich, and BET are types of adsorption isotherms.
Correct Answer: D — Henry
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Q. Which of the following is NOT a type of digital modulation?
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A.
Amplitude Shift Keying (ASK)
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B.
Frequency Shift Keying (FSK)
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C.
Phase Shift Keying (PSK)
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D.
Continuous Wave Modulation (CWM)
Solution
Continuous Wave Modulation (CWM) is not a type of digital modulation; it refers to analog modulation techniques.
Correct Answer: D — Continuous Wave Modulation (CWM)
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Q. Which of the following is NOT a type of elastic deformation?
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A.
Tensile deformation
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B.
Compressive deformation
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C.
Shear deformation
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D.
Plastic deformation
Solution
Plastic deformation is not elastic; it is permanent deformation that occurs beyond the elastic limit.
Correct Answer: D — Plastic deformation
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Q. Which of the following is NOT a type of isomerism?
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A.
Geometric isomerism
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B.
Optical isomerism
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C.
Hydrogen isomerism
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D.
Structural isomerism
Solution
Hydrogen isomerism is not a recognized type of isomerism in chemistry.
Correct Answer: C — Hydrogen isomerism
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Q. Which of the following is NOT a type of modulus of elasticity?
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A.
Young's modulus
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B.
Shear modulus
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C.
Bulk modulus
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D.
Tensile modulus
Solution
Tensile modulus is not a standard term; the correct terms are Young's modulus, shear modulus, and bulk modulus.
Correct Answer: D — Tensile modulus
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Q. Which of the following is NOT a type of stress?
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A.
Tensile stress
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B.
Compressive stress
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C.
Shear stress
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D.
Thermal stress
Solution
Thermal stress is a result of temperature changes, while tensile, compressive, and shear stresses are types of mechanical stress.
Correct Answer: D — Thermal stress
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Q. Which of the following is NOT a unit of power?
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A.
Horsepower
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B.
Kilowatt
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C.
Joule
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D.
Watt
Solution
Joule is a unit of energy, not power. Power is measured in Watts, Kilowatts, and Horsepower.
Correct Answer: C — Joule
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Q. Which of the following is NOT a use of a potentiometer?
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A.
Measuring emf of a cell.
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B.
Comparing emf of two cells.
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C.
Measuring resistance directly.
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D.
Calibrating voltmeters.
Solution
A potentiometer is not used for direct resistance measurement; it is primarily used for voltage measurements.
Correct Answer: C — Measuring resistance directly.
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Q. Which of the following is not an alkali metal?
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A.
Lithium
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B.
Sodium
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C.
Calcium
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D.
Potassium
Solution
Calcium is not an alkali metal; it is an alkaline earth metal.
Correct Answer: C — Calcium
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Q. Which of the following is NOT an aromatic compound?
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A.
Naphthalene
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B.
Benzene
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C.
Cyclooctatetraene
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D.
Anthracene
Solution
Cyclooctatetraene is not aromatic because it does not satisfy Huckel's rule; it is non-planar and does not have a continuous overlap of p-orbitals.
Correct Answer: C — Cyclooctatetraene
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Q. Which of the following is not an assumption of the kinetic molecular theory?
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A.
Gas particles are in constant motion
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B.
Gas particles have no volume
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C.
Gas particles attract each other
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D.
Collisions between gas particles are elastic
Solution
The kinetic molecular theory assumes that gas particles do not attract or repel each other.
Correct Answer: C — Gas particles attract each other
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Q. Which of the following is not an s-block element?
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A.
Calcium
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B.
Barium
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C.
Magnesium
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D.
Aluminum
Solution
Aluminum is not an s-block element; it is a p-block element.
Correct Answer: D — Aluminum
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Q. Which of the following is not continuous at x = 0?
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A.
f(x) = x^3
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B.
f(x) = e^x
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C.
f(x) = 1/x
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D.
f(x) = ln(x)
Solution
f(x) = 1/x is not continuous at x = 0 as it is undefined there.
Correct Answer: C — f(x) = 1/x
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Q. Which of the following is the best conductor of heat?
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A.
Air
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B.
Water
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C.
Copper
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D.
Wood
Solution
Copper is known to be one of the best conductors of heat among the given options.
Correct Answer: C — Copper
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Q. Which of the following is the conjugate of the complex number 2 - 3i? (2020)
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A.
2 + 3i
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B.
2 - 3i
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C.
3 - 2i
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D.
3 + 2i
Solution
The conjugate of a complex number a + bi is a - bi. Thus, the conjugate of 2 - 3i is 2 + 3i.
Correct Answer: A — 2 + 3i
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Q. Which of the following is the conjugate of the complex number 5 - 3i? (2020)
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A.
5 + 3i
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B.
5 - 3i
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C.
-5 + 3i
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D.
-5 - 3i
Solution
The conjugate of a complex number a + bi is a - bi. Thus, the conjugate of 5 - 3i is 5 + 3i.
Correct Answer: A — 5 + 3i
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Q. Which of the following is the correct conversion factor from kilometers to meters?
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A.
1000
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B.
0.1
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C.
0.001
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D.
10
Solution
1 kilometer is equal to 1000 meters, hence the conversion factor is 1000.
Correct Answer: A — 1000
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Q. Which of the following is the correct conversion of 1 kilometer to meters?
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A.
100 m
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B.
1000 m
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C.
10 m
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D.
0.1 m
Solution
1 kilometer is equal to 1000 meters.
Correct Answer: B — 1000 m
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Q. Which of the following is the correct conversion of 1 km to meters?
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A.
100 m
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B.
1000 m
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C.
10 m
-
D.
0.1 m
Solution
1 kilometer is equal to 1000 meters.
Correct Answer: B — 1000 m
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Q. Which of the following is the correct dimensional formula for electric charge?
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A.
[M^1 L^2 T^-3 A^-1]
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B.
[M^0 L^0 T^0 A^1]
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C.
[M^0 L^1 T^-2 A^1]
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D.
[M^1 L^1 T^-2 A^-1]
Solution
The dimensional formula for electric charge is [M^1 L^2 T^-3 A^-1], derived from the definition of current.
Correct Answer: A — [M^1 L^2 T^-3 A^-1]
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Q. Which of the following is the correct dimensional formula for frequency? (2021)
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A.
[M^0 L^0 T^-1]
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B.
[M^0 L^1 T^-1]
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C.
[M^1 L^0 T^-1]
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D.
[M^0 L^0 T^1]
Solution
Frequency has the dimensional formula [M^0 L^0 T^-1].
Correct Answer: A — [M^0 L^0 T^-1]
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Q. Which of the following is the correct expression for the van der Waals equation?
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A.
(P + a(n/V)^2)(V - nb) = nRT
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B.
(P - a(n/V)^2)(V + nb) = nRT
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C.
PV = nRT + a(n/V)^2
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D.
PV = nRT - nb
Solution
The van der Waals equation is (P + a(n/V)^2)(V - nb) = nRT.
Correct Answer: A — (P + a(n/V)^2)(V - nb) = nRT
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Q. Which of the following is the correct formula for ethyne?
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A.
C2H2
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B.
C2H4
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C.
C2H6
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D.
C2H8
Solution
Ethyne, also known as acetylene, has the formula C2H2, which indicates it is an alkyne.
Correct Answer: A — C2H2
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Q. Which of the following is the correct identity for sin(2A)?
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A.
2sinAcosA
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B.
sin^2A + cos^2A
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C.
sinA + cosA
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D.
sinAcosA
Solution
The double angle formula states that sin(2A) = 2sinAcosA.
Correct Answer: A — 2sinAcosA
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Q. Which of the following is the correct IUPAC name for C2H5-CO-CH3?
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A.
2-Pentanone
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B.
3-Pentanone
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C.
Butan-2-one
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D.
Butan-3-one
Solution
The compound is a ketone with a four-carbon chain, and the carbonyl group is on the second carbon, hence it is Butan-2-one.
Correct Answer: C — Butan-2-one
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Q. Which of the following is the correct IUPAC name for C3H6?
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A.
Propene
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B.
Cyclopropane
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C.
Propane
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D.
1-Propyn
Solution
C3H6 corresponds to propene, which is an alkene with a double bond.
Correct Answer: A — Propene
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Q. Which of the following is the correct IUPAC name for C3H7-COOH?
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A.
Propanoic acid
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B.
Butanoic acid
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C.
Pentanoic acid
-
D.
Hexanoic acid
Solution
The compound has 3 carbons in the longest chain and a carboxylic acid group, hence it is Propanoic acid.
Correct Answer: A — Propanoic acid
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Q. Which of the following is the correct IUPAC name for C5H10?
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A.
Pentane
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B.
Cyclopentane
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C.
1-Pentene
-
D.
2-Pentene
Solution
C5H10 corresponds to pentane, which is a straight-chain alkane with 5 carbon atoms.
Correct Answer: A — Pentane
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