Q. Which of the following expressions is equivalent to (x + 2)(x - 3)?
A.
x^2 - x - 6
B.
x^2 + x - 6
C.
x^2 - 5x - 6
D.
x^2 - x + 6
Show solution
Solution
Expanding (x + 2)(x - 3) gives x^2 - 3x + 2x - 6 = x^2 - x - 6.
Correct Answer:
A
— x^2 - x - 6
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Q. Which of the following expressions is equivalent to (x^3 * y^2)^2?
A.
x^6 * y^4
B.
x^5 * y^2
C.
x^3 * y^6
D.
x^2 * y^2
Show solution
Solution
Using the power of a product rule, (x^3 * y^2)^2 = x^(3*2) * y^(2*2) = x^6 * y^4.
Correct Answer:
A
— x^6 * y^4
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Q. Which of the following expressions is equivalent to 2(x + 3) - 4?
A.
2x + 6 - 4
B.
2x + 2
C.
2x + 10
D.
2x - 2
Show solution
Solution
Distributing 2 gives 2x + 6, and then subtracting 4 results in 2x + 2.
Correct Answer:
A
— 2x + 6 - 4
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Q. Which of the following expressions is equivalent to 2(x + 3)?
A.
2x + 3
B.
2x + 6
C.
x + 6
D.
2x + 9
Show solution
Solution
Distributing 2 gives 2 * x + 2 * 3 = 2x + 6.
Correct Answer:
B
— 2x + 6
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Q. Which of the following expressions is equivalent to 3(x + 4) - 2(x - 1)?
A.
x + 14
B.
x + 10
C.
x + 12
D.
x + 16
Show solution
Solution
Distributing gives 3x + 12 - 2x + 2 = x + 14.
Correct Answer:
A
— x + 14
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Q. Which of the following expressions is equivalent to 3(x + 4)?
A.
3x + 12
B.
3x + 4
C.
x + 12
D.
3x + 7
Show solution
Solution
Distributing 3 gives 3x + 12, which is the equivalent expression.
Correct Answer:
A
— 3x + 12
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Q. Which of the following expressions is equivalent to 3^(2x) * 3^(x+1)?
A.
3^(3x + 1)
B.
3^(2x + x + 1)
C.
3^(x + 2)
D.
3^(2x + 1)
Show solution
Solution
Using the property of exponents that states a^m * a^n = a^(m+n), we combine the exponents: 2x + (x + 1) = 3x + 1.
Correct Answer:
A
— 3^(3x + 1)
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Q. Which of the following expressions is equivalent to log_10(0.01)?
Show solution
Solution
log_10(0.01) can be rewritten as log_10(10^-2) = -2.
Correct Answer:
A
— -2
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Q. Which of the following expressions is equivalent to log_10(1/100)?
Show solution
Solution
log_10(1/100) = log_10(10^-2) = -2.
Correct Answer:
A
— -2
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Q. Which of the following expressions is equivalent to log_10(100) + log_10(10)?
Show solution
Solution
log_10(100) = 2 and log_10(10) = 1, so 2 + 1 = 3.
Correct Answer:
C
— 5
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Q. Which of the following expressions is equivalent to log_10(1000)?
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Solution
Since 1000 is 10^3, log_10(1000) = 3.
Correct Answer:
A
— 3
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Q. Which of the following expressions is equivalent to log_5(25) + log_5(5)?
A.
log_5(125)
B.
log_5(30)
C.
log_5(20)
D.
log_5(10)
Show solution
Solution
Using the property of logarithms, log_5(25) = 2 and log_5(5) = 1. Therefore, log_5(25) + log_5(5) = 2 + 1 = 3, which is log_5(125).
Correct Answer:
A
— log_5(125)
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Q. Which of the following expressions represents the coefficient of x^3 in the expansion of (2x + 3)^5?
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Solution
Using the Binomial Theorem, the coefficient of x^3 is given by C(5,3) * (2^3) * (3^2) = 10 * 8 * 9 = 720.
Correct Answer:
C
— 90
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Q. Which of the following expressions represents the inverse of 4^x?
A.
4^(-x)
B.
1/4^x
C.
4^(1-x)
D.
Both 1/4^x and 4^(-x)
Show solution
Solution
Both 1/4^x and 4^(-x) represent the inverse of 4^x.
Correct Answer:
D
— Both 1/4^x and 4^(-x)
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Q. Which of the following expressions represents the polynomial obtained by multiplying (x + 1) and (x - 1)?
A.
x^2 - 1
B.
x^2 + 1
C.
x^2 + 2
D.
x^2 - 2
Show solution
Solution
The product (x + 1)(x - 1) is a difference of squares, resulting in x^2 - 1.
Correct Answer:
A
— x^2 - 1
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Q. Which of the following expressions represents the product of the roots of the polynomial h(x) = x^2 - 4x + 4?
Show solution
Solution
The product of the roots of a quadratic polynomial ax^2 + bx + c is given by c/a. Here, c = 4 and a = 1, so the product is 4.
Correct Answer:
A
— 4
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Q. Which of the following expressions represents the sum of the coefficients in the expansion of (2x - 3)^4?
Show solution
Solution
To find the sum of the coefficients, substitute x = 1 into the expression: (2(1) - 3)^4 = (-1)^4 = 1, but the coefficients sum to -81.
Correct Answer:
D
— -81
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Q. Which of the following expressions represents the sum of the roots of the quadratic equation 5x^2 + 3x - 2 = 0?
A.
-3/5
B.
3/5
C.
2/5
D.
-2/5
Show solution
Solution
The sum of the roots is given by -b/a, which is -3/5 for this equation.
Correct Answer:
A
— -3/5
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Q. Which of the following expressions represents the vertex of the quadratic equation y = ax^2 + bx + c?
A.
(-b/2a, f(-b/2a))
B.
(b/2a, f(b/2a))
C.
(c/a, 0)
D.
(0, c)
Show solution
Solution
The vertex of the quadratic equation is given by the point (-b/2a, f(-b/2a)).
Correct Answer:
A
— (-b/2a, f(-b/2a))
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Q. Which of the following f-block elements is known for its use in nuclear reactors?
A.
Plutonium
B.
Neptunium
C.
Uranium
D.
Thorium
Show solution
Solution
Plutonium is widely used in nuclear reactors and weapons due to its fissile properties.
Correct Answer:
A
— Plutonium
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Q. Which of the following f-block elements is used in making strong permanent magnets? (2022)
A.
Cerium
B.
Neodymium
C.
Plutonium
D.
Uranium
Show solution
Solution
Neodymium is used in making strong permanent magnets, known as neodymium magnets.
Correct Answer:
B
— Neodymium
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Q. Which of the following f-block elements is used in nuclear reactors?
A.
Uranium
B.
Thorium
C.
Plutonium
D.
Neptunium
Show solution
Solution
Uranium is commonly used as fuel in nuclear reactors.
Correct Answer:
A
— Uranium
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Q. Which of the following f-block elements is used in the production of nuclear reactors? (2023)
A.
Uranium
B.
Thorium
C.
Plutonium
D.
Neptunium
Show solution
Solution
Uranium is commonly used in the production of nuclear reactors due to its fissile properties.
Correct Answer:
A
— Uranium
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Q. Which of the following factors contributed most significantly to the rise of poverty in India during the British colonial period?
A.
A. Agricultural policies
B.
B. Industrialization
C.
C. Education reforms
D.
D. Urbanization
Show solution
Solution
The British colonial policies, particularly in agriculture, led to widespread poverty due to exploitative land revenue systems and neglect of rural development.
Correct Answer:
A
— A. Agricultural policies
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Q. Which of the following factors contributed most significantly to the rise of the Mughal Empire in India?
A.
Military superiority over regional kingdoms
B.
Support from local chieftains
C.
Weakness of the Delhi Sultanate
D.
Religious tolerance policies
Show solution
Solution
The weakness of the Delhi Sultanate allowed the Mughals to establish their dominance, as they capitalized on the discontent among the local rulers and the fragmented political landscape.
Correct Answer:
C
— Weakness of the Delhi Sultanate
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Q. Which of the following factors contributed to the agricultural decline in the Roman Empire?
A.
Overreliance on slave labor
B.
Technological stagnation
C.
Climate change
D.
All of the above
Show solution
Solution
All of the above factors contributed to the agricultural decline in the Roman Empire, including overreliance on slave labor, technological stagnation, and climate change.
Correct Answer:
D
— All of the above
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Q. Which of the following factors does NOT affect Gibbs Free Energy?
A.
Temperature
B.
Pressure
C.
Concentration of reactants
D.
Nature of the solvent
Show solution
Solution
The nature of the solvent does not directly affect Gibbs Free Energy; it is primarily influenced by temperature, pressure, and concentration.
Correct Answer:
D
— Nature of the solvent
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Q. Which of the following factors does NOT affect surface tension?
A.
Temperature
B.
Impurities
C.
Density
D.
Nature of the liquid
Show solution
Solution
Density does not directly affect surface tension; it is influenced by temperature, impurities, and the nature of the liquid.
Correct Answer:
C
— Density
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Q. Which of the following factors does NOT affect the accuracy of a potentiometer?
A.
Temperature
B.
Length of the wire
C.
Material of the wire
D.
Color of the wire
Show solution
Solution
The color of the wire does not affect the accuracy of a potentiometer; however, temperature, length, and material do.
Correct Answer:
D
— Color of the wire
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Q. Which of the following factors does NOT affect the adsorption capacity of a solid?
A.
Surface area
B.
Temperature
C.
Nature of the adsorbate
D.
Color of the adsorbent
Show solution
Solution
The color of the adsorbent does not affect its adsorption capacity; factors like surface area, temperature, and nature of the adsorbate do.
Correct Answer:
D
— Color of the adsorbent
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