Q. What is the distance between the points (5, 5) and (1, 1)?
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Solution
Using the distance formula: d = √[(1 - 5)² + (1 - 5)²] = √[16 + 16] = √32 = 4√2.
Correct Answer: A — 4√2
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Q. What is the effect of adding a base to a solution of hydrochloric acid?
A.
Increase in pH
B.
Decrease in pH
C.
No effect
D.
Formation of salt only
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Solution
Adding a base to hydrochloric acid will neutralize it, resulting in an increase in pH.
Correct Answer: A — Increase in pH
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Q. What is the effect of adding a base to an acidic solution?
A.
Increase in pH
B.
Decrease in pH
C.
No effect
D.
Formation of salt only
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Solution
Adding a base to an acidic solution increases the pH, making it less acidic.
Correct Answer: A — Increase in pH
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Q. What is the electron configuration of a chlorine atom (atomic number 17)? (2020)
A.
1s² 2s² 2p⁶ 3s² 3p⁵
B.
1s² 2s² 2p⁶ 3s² 3p⁶
C.
1s² 2s² 2p⁶ 3s² 3p⁴
D.
1s² 2s² 2p⁶ 3s² 3d⁵
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Solution
The electron configuration of chlorine is 1s² 2s² 2p⁶ 3s² 3p⁵, filling up to the 3p subshell.
Correct Answer: A — 1s² 2s² 2p⁶ 3s² 3p⁵
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Q. What is the electron configuration of an oxygen atom? (2021)
A.
1s² 2s² 2p⁴
B.
1s² 2s² 2p²
C.
1s² 2s² 2p⁶
D.
1s² 2s² 2p³
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Solution
Oxygen has 8 electrons, and its electron configuration is 1s² 2s² 2p⁴.
Correct Answer: A — 1s² 2s² 2p⁴
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Q. What is the equation of a circle with center at (3, -2) and radius 5? (2022)
A.
(x-3)² + (y+2)² = 25
B.
(x+3)² + (y-2)² = 25
C.
(x-3)² + (y-2)² = 25
D.
(x+3)² + (y+2)² = 25
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Solution
The standard form of a circle's equation is (x-h)² + (y-k)² = r². Here, h=3, k=-2, r=5, so (x-3)² + (y+2)² = 25.
Correct Answer: A — (x-3)² + (y+2)² = 25
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Q. What is the equation of the circle with center at (2, -3) and radius 5?
A.
(x-2)² + (y+3)² = 25
B.
(x+2)² + (y-3)² = 25
C.
(x-2)² + (y-3)² = 25
D.
(x+2)² + (y+3)² = 25
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Solution
Standard form of a circle: (x-h)² + (y-k)² = r². Here, h=2, k=-3, r=5.
Correct Answer: A — (x-2)² + (y+3)² = 25
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Q. What is the equation of the line parallel to y = 3x + 4 that passes through the point (1, 2)? (2020)
A.
y = 3x - 1
B.
y = 3x + 1
C.
y = 3x + 2
D.
y = 3x - 2
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Solution
Parallel lines have the same slope. Using point-slope form: y - 2 = 3(x - 1) gives y = 3x - 1.
Correct Answer: A — y = 3x - 1
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Q. What is the equation of the line that passes through the origin and has a slope of -3? (2022)
A.
y = -3x
B.
y = 3x
C.
y = -x/3
D.
y = 1/3x
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Solution
The equation of a line through the origin with slope m is y = mx. Thus, y = -3x.
Correct Answer: A — y = -3x
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Q. What is the equation of the line that passes through the origin and has a slope of -4? (2023)
A.
y = -4x
B.
y = 4x
C.
y = -x/4
D.
y = 1/4x
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Solution
Using the slope-intercept form y = mx + b, with m = -4 and b = 0, the equation is y = -4x.
Correct Answer: A — y = -4x
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Q. What is the equivalent resistance of two resistors of 4 ohms and 6 ohms connected in series?
A.
10 ohms
B.
24 ohms
C.
2.4 ohms
D.
0.67 ohms
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Solution
In series, the equivalent resistance is the sum: R_eq = R1 + R2 = 4 Ω + 6 Ω = 10 Ω.
Correct Answer: A — 10 ohms
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Q. What is the equivalent resistance of two resistors of 4 ohms and 6 ohms in series?
A.
10 ohms
B.
24 ohms
C.
2.4 ohms
D.
0.67 ohms
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Solution
In series, the equivalent resistance is the sum: R_eq = R1 + R2 = 4 Ω + 6 Ω = 10 Ω.
Correct Answer: A — 10 ohms
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Q. What is the focal length of a diverging lens if the image distance is -15 cm and the object distance is -10 cm? (2023)
A.
-30 cm
B.
-20 cm
C.
-15 cm
D.
-10 cm
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Solution
Using the lens formula 1/f = 1/v - 1/u, we find f = -20 cm.
Correct Answer: B — -20 cm
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Q. What is the formula for calculating the capacitance of a parallel plate capacitor?
A.
C = εA/d
B.
C = A/εd
C.
C = d/εA
D.
C = εd/A
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Solution
The capacitance (C) of a parallel plate capacitor is given by C = εA/d, where ε is the permittivity, A is the area of the plates, and d is the distance between them.
Correct Answer: A — C = εA/d
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Q. What is the function of chlorophyll in plants? (2022)
A.
Absorbing water
B.
Absorbing sunlight
C.
Transporting nutrients
D.
Storing energy
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Solution
Chlorophyll is the pigment in plants that absorbs sunlight, which is essential for photosynthesis.
Correct Answer: B — Absorbing sunlight
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Q. What is the function of mitochondria in a cell? (2022)
A.
Photosynthesis
B.
Energy production
C.
Protein synthesis
D.
Cell division
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Solution
Mitochondria are known as the powerhouses of the cell, generating ATP through cellular respiration.
Correct Answer: B — Energy production
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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%
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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 highest peak in India?
A.
K2
B.
Kangchenjunga
C.
Nanda Devi
D.
Mount Everest
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Solution
Kangchenjunga is the highest peak in India, standing at 8,586 meters.
Correct Answer: B — Kangchenjunga
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Q. What is the IUPAC name for CH3-CH2-COOH?
A.
Propanoic acid
B.
Butanoic acid
C.
Acetic acid
D.
Methanoic acid
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Solution
The IUPAC name for CH3-CH2-COOH is propanoic acid, as it has three carbon atoms in the longest chain.
Correct Answer: A — Propanoic acid
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Q. What is the latent heat of fusion of ice if 80 g of ice at 0°C melts to water at 0°C, absorbing 2400 J of heat? (2022)
A.
30 J/g
B.
40 J/g
C.
50 J/g
D.
60 J/g
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Solution
Latent heat of fusion (L) = Q/m = 2400 J / 80 g = 30 J/g.
Correct Answer: B — 40 J/g
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Q. What is the latus rectum of the parabola given by the equation y^2 = 12x?
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Solution
The latus rectum of a parabola y^2 = 4px is given by 4p. Here, 4p = 12, so p = 3, and the latus rectum is 4p = 12.
Correct Answer: C — 6
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Q. What is the least common multiple (LCM) of 4 and 6? (2021)
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Solution
LCM of 4 and 6 is 12.
Correct Answer: A — 12
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Q. What is the length of the diagonal of a rectangle with length 6 cm and width 8 cm? (2022)
A.
10 cm
B.
12 cm
C.
14 cm
D.
16 cm
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Solution
The length of the diagonal d of a rectangle can be found using the Pythagorean theorem: d = √(length² + width²) = √(6² + 8²) = √(36 + 64) = √100 = 10 cm.
Correct Answer: A — 10 cm
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Q. What is the length of the diagonal of a rectangle with sides 6 cm and 8 cm? (2020)
A.
10 cm
B.
12 cm
C.
14 cm
D.
16 cm
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Solution
Diagonal = √(length² + width²) = √(6² + 8²) = √(36 + 64) = √100 = 10 cm
Correct Answer: A — 10 cm
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Q. What is the length of the diameter of a circle with an area of 50π square units? (2023)
A.
10 units
B.
5 units
C.
20 units
D.
15 units
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Solution
Area = πr². Given area = 50π, r² = 50, r = √50 = 5√2. Diameter = 2r = 10√2 units.
Correct Answer: A — 10 units
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Q. What is the length of the median from the vertex opposite the side of length 10 cm in a triangle with sides 10 cm, 10 cm, and 10 cm? (2023)
A.
5 cm
B.
10 cm
C.
8 cm
D.
7 cm
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Solution
In an equilateral triangle, the median is equal to the side length, so it is 10 cm.
Correct Answer: B — 10 cm
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Q. What is the limit: lim (x -> 0) (cos(x) - 1)/x^2? (2019)
A.
0
B.
-1/2
C.
1
D.
Undefined
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Solution
Using the Taylor series expansion for cos(x), we find that lim (x -> 0) (cos(x) - 1)/x^2 = -1/2.
Correct Answer: B — -1/2
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Q. What is the limit: lim (x -> 0) (e^x - 1)/x? (2022)
A.
1
B.
0
C.
e
D.
Undefined
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Solution
Using the derivative of e^x at x = 0, we find that lim (x -> 0) (e^x - 1)/x = 1.
Correct Answer: A — 1
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Q. What is the local time at 45°E if it is 12:00 noon at GMT?
A.
3:00 PM
B.
4:00 PM
C.
5:00 PM
D.
6:00 PM
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Solution
45°E corresponds to 45 / 15 = 3 hours ahead of GMT, so it will be 12:00 noon + 3 hours = 3:00 PM.
Correct Answer: B — 4:00 PM
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Q. What is the local time at 90 degrees East longitude when it is 6:00 AM at the Prime Meridian? (2023)
A.
3:00 AM
B.
9:00 AM
C.
12:00 PM
D.
6:00 PM
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Solution
90 degrees East is 6 hours ahead of GMT, so 6:00 AM + 6 hours = 12:00 PM.
Correct Answer: B — 9:00 AM
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