MHT-CET
Q. What is the product of the roots of the equation x² - 10x + 24 = 0? (2021)
Show solution
Solution
The product of the roots is given by c/a = 24/1 = 24.
Correct Answer: A — 24
Learn More →
Q. What is the product of the roots of the equation x² - 8x + 15 = 0? (2022)
Show solution
Solution
The product of the roots is given by c/a = 15/1 = 15.
Correct Answer: A — 15
Learn More →
Q. What is the projection of vector A = 3i + 4j onto vector B = i + j? (2020)
Show solution
Solution
proj_B(A) = (A · B / |B|^2)B = ((3*1 + 4*1) / (1^2 + 1^2))(i + j) = (7/2)(i + j) = 3.5.
Correct Answer: C — 5
Learn More →
Q. What is the radius of a circle if the area is 154 square units? (2023)
A.
7 units
B.
14 units
C.
11 units
D.
10 units
Show solution
Solution
Area = πr²; 154 = 22/7 * r²; r² = 154 * 7/22 = 49; r = 7 units.
Correct Answer: A — 7 units
Learn More →
Q. What is the radius of a circle if the circumference is 31.4 m? (2020)
A.
5 m
B.
10 m
C.
15 m
D.
20 m
Show solution
Solution
Circumference = 2πr; 31.4 = 2πr; r = 31.4/(2π) ≈ 5 m.
Correct Answer: A — 5 m
Learn More →
Q. What is the radius of a circle if the diameter is 14 cm? (2021)
A.
7 cm
B.
14 cm
C.
21 cm
D.
28 cm
Show solution
Solution
Radius is half of the diameter. Therefore, radius = 14 cm / 2 = 7 cm.
Correct Answer: A — 7 cm
Learn More →
Q. What is the rate constant of a first-order reaction if the half-life is 10 minutes? (2021)
A.
0.0693 min⁻¹
B.
0.1 min⁻¹
C.
0.693 min⁻¹
D.
0.5 min⁻¹
Show solution
Solution
For a first-order reaction, k = 0.693 / t₁/₂. Here, t₁/₂ = 10 min, so k = 0.693 / 10 = 0.0693 min⁻¹.
Correct Answer: A — 0.0693 min⁻¹
Learn More →
Q. What is the rate law expression for a reaction that is first order with respect to A and second order with respect to B? (2022)
A.
Rate = k[A][B]^2
B.
Rate = k[A]^2[B]
C.
Rate = k[A]^2[B]^2
D.
Rate = k[A][B]
Show solution
Solution
The rate law for a reaction is determined by the order with respect to each reactant. For a first order with respect to A and second order with respect to B, the rate law is Rate = k[A][B]^2.
Correct Answer: A — Rate = k[A][B]^2
Learn More →
Q. What is the rate law expression for a reaction that is second order with respect to reactant A? (2023)
A.
Rate = k[A]
B.
Rate = k[A]^2
C.
Rate = k[A]^2[B]
D.
Rate = k[A][B]
Show solution
Solution
For a second order reaction with respect to A, the rate law is expressed as Rate = k[A]^2.
Correct Answer: B — Rate = k[A]^2
Learn More →
Q. What is the rate law for a reaction that is first order with respect to A and second order with respect to B? (2022) 2022
A.
Rate = k[A][B]^2
B.
Rate = k[A]^2[B]
C.
Rate = k[A]^2[B]^2
D.
Rate = k[A][B]
Show solution
Solution
The rate law is determined by the order of the reaction with respect to each reactant. For first order in A and second order in B, the rate law is Rate = k[A][B]^2.
Correct Answer: A — Rate = k[A][B]^2
Learn More →
Q. What is the real part of the complex number 4 + 5i? (2023)
Show solution
Solution
The real part of the complex number 4 + 5i is 4.
Correct Answer: A — 4
Learn More →
Q. What is the real part of the complex number 7 - 4i? (2023)
Show solution
Solution
The real part of the complex number 7 - 4i is 7.
Correct Answer: A — 7
Learn More →
Q. What is the reduction potential of the half-reaction 2H⁺ + 2e⁻ → H₂?
A.
0.00 V
B.
0.34 V
C.
0.76 V
D.
1.23 V
Show solution
Solution
The standard reduction potential for 2H⁺ + 2e⁻ → H₂ is 0.00 V.
Correct Answer: D — 1.23 V
Learn More →
Q. What is the relationship between Gibbs free energy (ΔG) and cell potential (E) in electrochemistry?
A.
ΔG = -nFE
B.
ΔG = nFE
C.
ΔG = -E/nF
D.
ΔG = E/nF
Show solution
Solution
The relationship is ΔG = -nFE, where n is the number of moles of electrons transferred.
Correct Answer: A — ΔG = -nFE
Learn More →
Q. What is the relationship between the frequency and the period of a wave? (2021)
A.
Frequency is the square of the period
B.
Period is the reciprocal of frequency
C.
Frequency and period are unrelated
D.
Period is the square root of frequency
Show solution
Solution
The period T is the reciprocal of frequency f, given by T = 1/f.
Correct Answer: B — Period is the reciprocal of frequency
Learn More →
Q. What is the relationship between the rate of reaction and temperature according to the Arrhenius equation? (2022)
A.
Inversely proportional
B.
Directly proportional
C.
Exponential
D.
Linear
Show solution
Solution
According to the Arrhenius equation, the rate of reaction increases exponentially with temperature.
Correct Answer: C — Exponential
Learn More →
Q. What is the relationship between the wavelength of light and the angle of diffraction in a grating? (2023)
A.
Directly proportional
B.
Inversely proportional
C.
No relationship
D.
Exponential relationship
Show solution
Solution
The angle of diffraction is directly proportional to the wavelength of light used in a diffraction grating, as described by the grating equation.
Correct Answer: A — Directly proportional
Learn More →
Q. What is the result of (15 + 5) × 2? (2020)
Show solution
Solution
(15 + 5) = 20, then 20 × 2 = 40.
Correct Answer: B — 30
Learn More →
Q. What is the result of (15 + 5) × 2? (2023) 2023
Show solution
Solution
(15 + 5) = 20, so 20 × 2 = 40.
Correct Answer: A — 30
Learn More →
Q. What is the result of (15 ÷ 3) × 4? (2020)
Show solution
Solution
15 ÷ 3 = 5, then 5 × 4 = 20.
Correct Answer: A — 20
Learn More →
Q. What is the shape of a molecule with a tetrahedral geometry? (2023)
A.
Linear
B.
Trigonal planar
C.
Tetrahedral
D.
Octahedral
Show solution
Solution
A tetrahedral geometry has a central atom bonded to four other atoms, forming a shape like a pyramid with a triangular base.
Correct Answer: C — Tetrahedral
Learn More →
Q. What is the shape of the methane (CH4) molecule? (2023)
A.
Linear
B.
Trigonal planar
C.
Tetrahedral
D.
Octahedral
Show solution
Solution
Methane (CH4) has a tetrahedral shape due to the four pairs of bonding electrons around the central carbon atom.
Correct Answer: C — Tetrahedral
Learn More →
Q. What is the shape of the s orbital? (2021) 2021
A.
Spherical
B.
Dumbbell
C.
Double dumbbell
D.
Linear
Show solution
Solution
The s orbital has a spherical shape.
Correct Answer: A — Spherical
Learn More →
Q. What is the SI unit of electric charge? (2020)
A.
Coulomb
B.
Ampere
C.
Volt
D.
Ohm
Show solution
Solution
The SI unit of electric charge is Coulomb (C).
Correct Answer: A — Coulomb
Learn More →
Q. What is the simplest ketone?
A.
Acetaldehyde
B.
Acetone
C.
Butanone
D.
Propionaldehyde
Show solution
Solution
Acetone (CH3COCH3) is the simplest ketone.
Correct Answer: B — Acetone
Learn More →
Q. What is the slope of the line passing through the points (1, 2) and (3, 6)? (2020) 2020
Show solution
Solution
Slope = (6-2)/(3-1) = 4/2 = 2.
Correct Answer: A — 2
Learn More →
Q. What is the slope of the line perpendicular to the line 3x + 4y = 12?
A.
-3/4
B.
4/3
C.
3/4
D.
-4/3
Show solution
Solution
The slope of the line 3x + 4y = 12 is -3/4. The slope of the perpendicular line is the negative reciprocal, which is 4/3.
Correct Answer: B — 4/3
Learn More →
Q. What is the slope of the line perpendicular to the line 4x + 3y = 12?
A.
-3/4
B.
4/3
C.
3/4
D.
-4/3
Show solution
Solution
The slope of the line 4x + 3y = 12 is -4/3. The slope of the perpendicular line is the negative reciprocal, which is 3/4.
Correct Answer: D — -4/3
Learn More →
Q. What is the slope of the line perpendicular to the line 5x + 2y = 10?
A.
-2/5
B.
5/2
C.
2/5
D.
-5/2
Show solution
Solution
The slope of the line is -5/2. The slope of the perpendicular line is the negative reciprocal, which is 2/5.
Correct Answer: A — -2/5
Learn More →
Q. What is the slope of the line perpendicular to the line 7x - 2y + 3 = 0?
A.
1/2
B.
-1/2
C.
2
D.
-2
Show solution
Solution
The slope of the line is 7/2. The slope of the perpendicular line is the negative reciprocal, which is -2/7.
Correct Answer: B — -1/2
Learn More →
Showing 1321 to 1350 of 1717 (58 Pages)