Q. What is the functional group of aldehydes?
-
A.
-OH
-
B.
-CHO
-
C.
-C=O
-
D.
-COOH
Solution
The functional group of aldehydes is -CHO.
Correct Answer:
B
— -CHO
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Q. What is the functional group of ketones?
-
A.
-CHO
-
B.
-CO-
-
C.
-OH
-
D.
-NH2
Solution
The functional group of ketones is -CO-, which is a carbonyl group between two carbon atoms.
Correct Answer:
B
— -CO-
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Q. What is the functional group of phenols? (2019) 2019
-
A.
-OH
-
B.
-COOH
-
C.
-CHO
-
D.
-NH2
Solution
Phenols contain a hydroxyl group (-OH) directly attached to an aromatic ring.
Correct Answer:
A
— -OH
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Q. What is the functional group of phenols? (2021)
-
A.
-OH
-
B.
-COOH
-
C.
-CHO
-
D.
-NH2
Solution
Phenols contain a hydroxyl group (-OH) directly attached to an aromatic hydrocarbon group.
Correct Answer:
A
— -OH
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Q. What is the functional group present in alcohols?
-
A.
Aldehyde
-
B.
Ketone
-
C.
Hydroxyl
-
D.
Carboxylic acid
Solution
Alcohols contain a hydroxyl (-OH) functional group.
Correct Answer:
C
— Hydroxyl
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Q. What is the functional group present in alcohols? (2023) 2023
-
A.
Aldehyde
-
B.
Ketone
-
C.
Hydroxyl
-
D.
Carboxylic acid
Solution
Alcohols contain a hydroxyl (-OH) functional group.
Correct Answer:
C
— Hydroxyl
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Q. What is the functional group present in carboxylic acids?
-
A.
Hydroxyl group
-
B.
Carbonyl group
-
C.
Carboxyl group
-
D.
Amino group
Solution
Carboxylic acids contain the carboxyl group (-COOH), which is the defining feature of this class of compounds.
Correct Answer:
C
— Carboxyl group
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Q. What is the functional group present in ketones?
-
A.
-CHO
-
B.
-CO-
-
C.
-OH
-
D.
-C=O
Solution
Ketones contain the functional group -CO- (carbonyl group) between two carbon atoms.
Correct Answer:
B
— -CO-
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Q. What is the functional group present in phenols? (2021)
-
A.
-OH
-
B.
-COOH
-
C.
-CHO
-
D.
-NH2
Solution
Phenols contain a hydroxyl group (-OH) directly attached to an aromatic hydrocarbon group.
Correct Answer:
A
— -OH
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Q. What is the functional group present in phenols? (2021) 2021
-
A.
-OH
-
B.
-COOH
-
C.
-CHO
-
D.
-NH2
Solution
Phenols contain a hydroxyl group (-OH) directly attached to an aromatic hydrocarbon group.
Correct Answer:
A
— -OH
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Q. What is the functional unit of the lung where gas exchange occurs? (2019)
-
A.
Bronchi
-
B.
Alveoli
-
C.
Trachea
-
D.
Larynx
Solution
Alveoli are the tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place.
Correct Answer:
B
— Alveoli
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Q. What is the fundamental frequency of a pipe open at both ends if its length is 2 m?
-
A.
85 Hz
-
B.
170 Hz
-
C.
340 Hz
-
D.
425 Hz
Solution
The fundamental frequency is given by f = v/λ. For a pipe open at both ends, λ = 2L = 4 m. Thus, f = 343 m/s / 4 m = 85.75 Hz, approximately 85 Hz.
Correct Answer:
B
— 170 Hz
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Q. What is the fundamental frequency of a pipe open at both ends that is 2 meters long?
-
A.
85 Hz
-
B.
170 Hz
-
C.
340 Hz
-
D.
425 Hz
Solution
The fundamental frequency is given by f = v/λ; for a pipe open at both ends, λ = 2L, so f = v/(2L) = 343/(2*2) = 42.875 Hz.
Correct Answer:
B
— 170 Hz
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Q. What is the future tense of the verb 'to write'? (2019)
-
A.
Wrote
-
B.
Writing
-
C.
Writes
-
D.
Will write
Solution
Will write indicates an action that will happen in the future.
Correct Answer:
D
— Will write
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Q. What is the GCF of 24 and 36?
Solution
The GCF of 24 and 36 is 12, as it is the largest number that divides both without leaving a remainder.
Correct Answer:
B
— 12
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Q. What is the GDP growth rate of India projected for 2023? (2023)
-
A.
5.5%
-
B.
6.0%
-
C.
6.8%
-
D.
7.5%
Solution
The GDP growth rate of India is projected to be around 6.8% for 2023.
Correct Answer:
C
— 6.8%
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Q. What is the general electronic configuration of alkali metals? (2022)
-
A.
ns^1
-
B.
ns^2
-
C.
ns^2np^1
-
D.
ns^2np^2
Solution
The general electronic configuration of alkali metals is ns^1, where n is the principal quantum number.
Correct Answer:
A
— ns^1
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Q. What is the general form of the equation for a damped harmonic oscillator?
-
A.
x(t) = A cos(ωt)
-
B.
x(t) = A e^(-bt) cos(ωt)
-
C.
x(t) = A sin(ωt)
-
D.
x(t) = A e^(bt) cos(ωt)
Solution
The equation x(t) = A e^(-bt) cos(ωt) describes the motion of a damped harmonic oscillator.
Correct Answer:
B
— x(t) = A e^(-bt) cos(ωt)
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Q. What is the general form of the equation of motion for a damped harmonic oscillator?
-
A.
m d²x/dt² + b dx/dt + kx = 0
-
B.
m d²x/dt² + kx = 0
-
C.
m d²x/dt² + b dx/dt = 0
-
D.
m d²x/dt² + b dx/dt + kx = F(t)
Solution
The equation of motion for a damped harmonic oscillator includes a damping term and is given by m d²x/dt² + b dx/dt + kx = 0.
Correct Answer:
A
— m d²x/dt² + b dx/dt + kx = 0
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Q. What is the general form of the equation of motion for a damped oscillator?
-
A.
m d²x/dt² + b dx/dt + kx = 0
-
B.
m d²x/dt² + kx = 0
-
C.
m d²x/dt² + b dx/dt = 0
-
D.
m d²x/dt² + b dx/dt + kx = F(t)
Solution
The equation of motion for a damped oscillator includes a damping term (b dx/dt) along with the restoring force (kx).
Correct Answer:
A
— m d²x/dt² + b dx/dt + kx = 0
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Q. What is the general form of the family of curves for the equation x^2 + y^2 = r^2?
-
A.
Ellipses
-
B.
Hyperbolas
-
C.
Circles
-
D.
Parabolas
Solution
The equation x^2 + y^2 = r^2 represents a family of circles with varying radii (r).
Correct Answer:
C
— Circles
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Q. What is the general form of the family of curves represented by the equation x^2 + y^2 = r^2?
-
A.
Circles with radius r
-
B.
Ellipses with semi-major axis r
-
C.
Hyperbolas with transverse axis r
-
D.
Straight lines with slope r
Solution
The equation x^2 + y^2 = r^2 represents a family of circles with radius r centered at the origin.
Correct Answer:
A
— Circles with radius r
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Q. What is the general form of the family of curves represented by the equation y = mx^2 + c?
-
A.
Parabolas
-
B.
Circles
-
C.
Ellipses
-
D.
Hyperbolas
Solution
The equation y = mx^2 + c represents a family of parabolas that open upwards or downwards depending on the sign of m.
Correct Answer:
A
— Parabolas
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Q. What is the general form of the family of curves represented by y^2 = 4ax?
-
A.
Parabolas opening to the right
-
B.
Circles with varying centers
-
C.
Ellipses with varying foci
-
D.
Hyperbolas with varying asymptotes
Solution
The equation y^2 = 4ax represents a family of parabolas that open to the right with varying values of 'a'.
Correct Answer:
A
— Parabolas opening to the right
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Q. What is the general formula for aldehydes? (2023)
-
A.
C_nH_(2n)
-
B.
C_nH_(2n+1)CHO
-
C.
C_nH_(2n+2)
-
D.
C_nH_(2n-1)CHO
Solution
The general formula for aldehydes is C_nH_(2n+1)CHO, where n is the number of carbon atoms.
Correct Answer:
B
— C_nH_(2n+1)CHO
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Q. What is the general formula for alkanes?
-
A.
C_nH_(2n)
-
B.
C_nH_(2n+2)
-
C.
C_nH_(2n-2)
-
D.
C_nH_(n)
Solution
The general formula for alkanes is C_nH_(2n+2).
Correct Answer:
B
— C_nH_(2n+2)
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Q. What is the general formula for alkenes?
-
A.
C_nH_(2n)
-
B.
C_nH_(2n+2)
-
C.
C_nH_(2n-2)
-
D.
C_nH_(2n+1)
Solution
Alkenes are unsaturated hydrocarbons with the general formula CnH2n.
Correct Answer:
A
— C_nH_(2n)
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Q. What is the general formula for alkynes?
-
A.
C_nH_(2n+2)
-
B.
C_nH_(2n)
-
C.
C_nH_(2n-2)
-
D.
C_nH_(2n-1)
Solution
The general formula for alkynes is C_nH_(2n-2), where n is the number of carbon atoms.
Correct Answer:
C
— C_nH_(2n-2)
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Q. What is the general formula for carbohydrates?
-
A.
C_n(H2O)_n
-
B.
C_nH_nO_n
-
C.
C_nH_2nO_n
-
D.
C_nH_2O_n
Solution
The general formula for carbohydrates is C_n(H2O)_n, indicating that they are hydrates of carbon.
Correct Answer:
A
— C_n(H2O)_n
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Q. What is the general formula for carboxylic acids?
-
A.
C_nH_2nO_2
-
B.
C_nH_2n+1COOH
-
C.
C_nH_2nO
-
D.
C_nH_2n+2O
Solution
The general formula for carboxylic acids is C_nH_2nO_2.
Correct Answer:
A
— C_nH_2nO_2
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