Q. Which of the following is the simplest carboxylic acid? (2020)
A.
Methanoic acid
B.
Ethanoic acid
C.
Propanoic acid
D.
Butanoic acid
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Solution
Methanoic acid (HCOOH) is the simplest carboxylic acid, containing only one carbon atom.
Correct Answer:
A
— Methanoic acid
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Q. Which of the following is the simplest ether? (2020)
A.
Dimethyl ether
B.
Diethyl ether
C.
Ethyl methyl ether
D.
Propyl ether
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Solution
Dimethyl ether (CH3-O-CH3) is the simplest ether, consisting of two methyl groups bonded to an oxygen atom.
Correct Answer:
A
— Dimethyl ether
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Q. Which of the following is the simplest ketone?
A.
Ethanal
B.
Propanal
C.
Butan-2-one
D.
Acetone
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Solution
Acetone (propan-2-one) is the simplest ketone, with the formula (CH3)2CO.
Correct Answer:
D
— Acetone
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Q. Which of the following is the smallest multiple of 7 that is greater than 50?
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Solution
The multiples of 7 are 7, 14, 21, 28, 35, 42, 49, 56, ... The smallest multiple greater than 50 is 56.
Correct Answer:
A
— 56
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Q. Which of the following is the smallest positive integer? (2023)
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Solution
The smallest positive integer is 1.
Correct Answer:
B
— 1
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Q. Which of the following is the smallest Union Territory of India by area?
A.
Chandigarh
B.
Lakshadweep
C.
Dadra and Nagar Haveli
D.
Delhi
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Solution
Lakshadweep is the smallest Union Territory of India by area.
Correct Answer:
B
— Lakshadweep
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Q. Which of the following is the solution set for the inequality x + 2 > 1?
A.
x > -1
B.
x < -1
C.
x > 1
D.
x < 1
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Solution
x + 2 > 1 => x > -1.
Correct Answer:
A
— x > -1
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Q. Which of the following is the solution set for the inequality x + 2 > 7?
A.
x > 5
B.
x < 5
C.
x > 9
D.
x < 9
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Solution
x + 2 > 7 => x > 5.
Correct Answer:
A
— x > 5
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Q. Which of the following is the solution set for the inequality x + 5 > 2?
A.
x > -3
B.
x < -3
C.
x > 3
D.
x < 3
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Solution
x + 5 > 2 => x > -3.
Correct Answer:
A
— x > -3
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Q. Which of the following is the solution set for the inequality: 3x + 2 > 11?
A.
x > 3
B.
x < 3
C.
x > 2
D.
x < 2
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Solution
3x + 2 > 11 => 3x > 9 => x > 3.
Correct Answer:
A
— x > 3
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Q. Which of the following is the solution to the inequality 3x + 2 ≥ 11?
A.
x < 3
B.
x > 3
C.
x ≤ 3
D.
x ≥ 3
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Solution
3x + 2 ≥ 11 => 3x ≥ 9 => x ≥ 3.
Correct Answer:
D
— x ≥ 3
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Q. Which of the following is the solution to the inequality x + 2 > 7?
A.
x < 5
B.
x > 5
C.
x < 9
D.
x > 9
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Solution
x + 2 > 7 => x > 5.
Correct Answer:
B
— x > 5
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Q. Which of the following is the southernmost point of mainland India? (2022)
A.
Kanyakumari
B.
Indira Point
C.
Cape Comorin
D.
Point Calimere
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Solution
Kanyakumari is the southernmost point of mainland India.
Correct Answer:
A
— Kanyakumari
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Q. Which of the following is the strongest acid?
A.
Formic acid
B.
Acetic acid
C.
Propanoic acid
D.
Butanoic acid
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Solution
Formic acid (HCOOH) is stronger than acetic acid (CH3COOH) due to the presence of a hydrogen atom directly attached to the carbonyl carbon, which stabilizes the conjugate base.
Correct Answer:
A
— Formic acid
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Q. Which of the following is the strongest carboxylic acid? (2022)
A.
Formic acid
B.
Acetic acid
C.
Propanoic acid
D.
Butanoic acid
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Solution
Formic acid (HCOOH) is the strongest carboxylic acid among the given options due to the presence of a hydrogen atom directly attached to the carbonyl carbon, which increases its acidity.
Correct Answer:
A
— Formic acid
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Q. Which of the following is the truth table for an AND gate?
A.
00, 01, 10, 11
B.
00, 01, 11, 10
C.
00, 10, 01, 11
D.
00, 11, 01, 10
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Solution
The truth table for an AND gate is: 00 -> 0, 01 -> 0, 10 -> 0, 11 -> 1.
Correct Answer:
A
— 00, 01, 10, 11
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Q. Which of the following is the unit of pressure? (2023)
A.
Newton
B.
Pascal
C.
Joule
D.
Watt
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Solution
The unit of pressure is Pascal (Pa), which is equivalent to N/m².
Correct Answer:
B
— Pascal
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Q. Which of the following is the upper house of the State Legislature?
A.
Lok Sabha
B.
Rajya Sabha
C.
Vidhan Sabha
D.
Vidhan Parishad
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Solution
Vidhan Parishad is the upper house of the State Legislature.
Correct Answer:
D
— Vidhan Parishad
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Q. Which of the following is true about a buffer solution?
A.
Resists changes in pH
B.
Has a pH of 7
C.
Contains only strong acids
D.
Is always neutral
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Solution
A buffer solution resists changes in pH upon the addition of small amounts of acid or base.
Correct Answer:
A
— Resists changes in pH
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Q. Which of the following is true about a saturated solution?
A.
It contains more solute than can dissolve
B.
It contains less solute than can dissolve
C.
It is always at boiling point
D.
It is always at freezing point
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Solution
A saturated solution contains the maximum amount of solute that can dissolve at a given temperature.
Correct Answer:
A
— It contains more solute than can dissolve
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Q. Which of the following is true about an exothermic reaction?
A.
ΔH is positive
B.
ΔH is negative
C.
ΔH is zero
D.
ΔH can be either positive or negative
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Solution
In an exothermic reaction, the enthalpy change (ΔH) is negative because heat is released.
Correct Answer:
B
— ΔH is negative
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Q. Which of the following is true about brittle materials? (2023)
A.
They can undergo large deformations
B.
They exhibit high ductility
C.
They fracture without significant plastic deformation
D.
They are always elastic
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Solution
Brittle materials fracture without significant plastic deformation.
Correct Answer:
C
— They fracture without significant plastic deformation
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Q. Which of the following is true about elastic potential energy stored in a stretched wire?
A.
It is proportional to the square of the elongation
B.
It is proportional to the elongation
C.
It is independent of the elongation
D.
It is inversely proportional to the elongation
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Solution
The elastic potential energy stored in a stretched wire is given by U = (1/2) * Y * (ΔL^2 / L), which is proportional to the square of the elongation.
Correct Answer:
A
— It is proportional to the square of the elongation
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Q. Which of the following is true about exothermic reactions? (2022)
A.
They absorb heat.
B.
They release heat.
C.
They have a positive ΔH.
D.
They are always spontaneous.
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Solution
Exothermic reactions release heat to the surroundings, resulting in a negative change in enthalpy (ΔH < 0).
Correct Answer:
B
— They release heat.
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Q. Which of the following is true about significant figures?
A.
All zeros are significant
B.
Leading zeros are significant
C.
Trailing zeros in a whole number are significant
D.
Trailing zeros in a decimal are significant
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Solution
Trailing zeros in a decimal are significant.
Correct Answer:
D
— Trailing zeros in a decimal are significant
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Q. Which of the following is true about the adsorption of gases on solids? (2023)
A.
It is always an exothermic process
B.
It is always an endothermic process
C.
It can be either exothermic or endothermic
D.
It does not involve energy changes
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Solution
The adsorption of gases on solids is typically an exothermic process, as energy is released when the gas molecules adhere to the surface.
Correct Answer:
A
— It is always an exothermic process
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Q. Which of the following is true about the classification of living organisms? (2022)
A.
It is static and unchanging
B.
It is based on evolutionary relationships
C.
It does not consider genetic information
D.
It is only based on morphological features
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Solution
Modern classification is based on evolutionary relationships, including genetic information.
Correct Answer:
B
— It is based on evolutionary relationships
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Q. Which of the following is true about the entropy of a system?
A.
It always decreases.
B.
It is a measure of disorder.
C.
It is independent of temperature.
D.
It can never increase.
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Solution
Entropy is a measure of disorder in a system, and it tends to increase in spontaneous processes.
Correct Answer:
B
— It is a measure of disorder.
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Q. Which of the following is true about the escape velocity from the surface of the Earth?
A.
It is independent of the mass of the object
B.
It is dependent on the mass of the Earth
C.
It is dependent on the radius of the Earth
D.
All of the above
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Solution
Escape velocity is independent of the mass of the object, but it depends on the mass and radius of the Earth.
Correct Answer:
D
— All of the above
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Q. Which of the following is true about the expression 2^(x+y)?
A.
It can be expressed as 2^x + 2^y.
B.
It can be expressed as 2^x * 2^y.
C.
It is always greater than 2.
D.
It is equal to 2 when x and y are both 0.
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Solution
Using the property of exponents, 2^(x+y) = 2^x * 2^y.
Correct Answer:
B
— It can be expressed as 2^x * 2^y.
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