Q. What is the primary state of matter that has a definite shape and volume?
A.
Gas
B.
Liquid
C.
Solid
D.
Plasma
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Solution
Solids have a definite shape and volume due to closely packed particles.
Correct Answer: C — Solid
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Q. What is the primary use of aluminum in construction?
A.
Electrical wiring
B.
Structural components
C.
Piping
D.
Insulation
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Solution
Aluminum is widely used in structural components due to its strength-to-weight ratio.
Correct Answer: B — Structural components
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Q. What is the probability of a person being diagnosed with a disease if the prevalence of the disease in a population is 2% and the test for the disease has a sensitivity of 90% and a specificity of 95%? (2021)
A.
0.018
B.
0.020
C.
0.090
D.
0.095
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Solution
Using Bayes' theorem, P(Disease|Positive) = (P(Positive|Disease) * P(Disease)) / P(Positive). Here, P(Positive) = P(Positive|Disease) * P(Disease) + P(Positive|No Disease) * P(No Disease). Calculating gives approximately 0.018.
Correct Answer: A — 0.018
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Q. What is the probability of a person being infected with a disease if the prevalence of the disease in a population is 2%? (2021)
A.
0.02
B.
0.5
C.
0.1
D.
0.03
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Solution
The prevalence of the disease is given as 2%, which can be expressed as a probability of 0.02.
Correct Answer: A — 0.02
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Q. What is the probability of drawing a heart from a standard deck of cards? (2022)
A.
1/4
B.
1/13
C.
1/52
D.
3/52
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Solution
There are 13 hearts in a deck of 52 cards. Probability = 13/52 = 1/4.
Correct Answer: A — 1/4
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Q. What is the product of the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH)? (2022)
A.
Sodium chloride and water
B.
Sodium chloride and hydrogen
C.
Hydrogen and oxygen
D.
Sodium and water
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Solution
The reaction between HCl and NaOH produces sodium chloride (NaCl) and water (H2O).
Correct Answer: A — Sodium chloride and water
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Q. What is the product of the reaction between sodium (Na) and chlorine (Cl2)? (2019)
A.
NaCl
B.
NaCl2
C.
Na2Cl
D.
Na2Cl2
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Solution
Sodium reacts with chlorine to form sodium chloride (NaCl).
Correct Answer: A — NaCl
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Q. What is the product of the roots of the equation 2x^2 - 8x + 6 = 0?
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Solution
The product of the roots of the equation ax^2 + bx + c = 0 is given by c/a. Here, c = 6 and a = 2, so the product is 6/2 = 3.
Correct Answer: A — 3
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Q. What is the product of the roots of the quadratic equation x^2 - 7x + 10 = 0? (2023)
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Solution
Using Vieta's formulas, the product of the roots is c/a = 10/1 = 10.
Correct Answer: A — 10
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Q. What is the projected fiscal deficit of India for the year 2023? (2023)
A.
4.5%
B.
5.0%
C.
5.5%
D.
6.0%
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Solution
The projected fiscal deficit of India for the year 2023 is around 5.5%.
Correct Answer: C — 5.5%
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Q. What is the rank of the matrix E = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]? (2023)
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Solution
The rank of E is 2 because the rows are linearly dependent (the third row is a linear combination of the first two).
Correct Answer: B — 2
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Q. What is the real part of the complex number z = 4 + 5i? (2022)
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Solution
The real part of z = 4 + 5i is 4.
Correct Answer: A — 4
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Q. What is the recommended daily intake of fruits and vegetables for a healthy diet?
A.
1-2 servings
B.
3-5 servings
C.
5-7 servings
D.
7-10 servings
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Solution
The recommended daily intake is 5-7 servings of fruits and vegetables for optimal health.
Correct Answer: B — 3-5 servings
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Q. What is the relationship between the angles of an equilateral triangle? (2023)
A.
All angles are 60 degrees
B.
All angles are 90 degrees
C.
Two angles are equal
D.
No angles are equal
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Solution
In an equilateral triangle, all three angles are equal and measure 60 degrees each.
Correct Answer: A — All angles are 60 degrees
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Q. What is the relationship between the corresponding angles when two parallel lines are cut by a transversal? (2022)
A.
They are equal
B.
They are supplementary
C.
They are complementary
D.
They are unequal
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Solution
When two parallel lines are cut by a transversal, the corresponding angles are equal.
Correct Answer: A — They are equal
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Q. What is the relationship between the sum of the interior angles of a triangle and the angles formed by a transversal cutting through two parallel lines? (2022)
A.
They are equal
B.
They are supplementary
C.
They are complementary
D.
They are unrelated
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Solution
The sum of the interior angles of a triangle is 180 degrees, and the angles formed by a transversal cutting through two parallel lines are supplementary, meaning they add up to 180 degrees.
Correct Answer: B — They are supplementary
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Q. What is the resistance of a wire of length 2 m and cross-sectional area 1 mm² if the resistivity of the material is 1.7 x 10^-8 Ωm?
A.
0.034 Ω
B.
0.017 Ω
C.
0.068 Ω
D.
0.085 Ω
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Solution
Resistance R = ρ * (L/A). Here, R = (1.7 x 10^-8 Ωm) * (2 m / (1 x 10^-6 m²)) = 0.034 Ω.
Correct Answer: A — 0.034 Ω
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Q. What is the result of (a - b)(a + b)?
A.
a² + b²
B.
a² - b²
C.
2ab
D.
ab
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Solution
(a - b)(a + b) = a² - b², which is the difference of squares.
Correct Answer: B — a² - b²
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Q. What is the result of (x + y)(x - y)?
A.
x² + y²
B.
x² - y²
C.
2xy
D.
xy
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Solution
(x + y)(x - y) = x² - y², which is the difference of squares.
Correct Answer: B — x² - y²
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Q. What is the result of mixing equal volumes of 0.1 M HCl and 0.1 M NaOH?
A.
pH < 7
B.
pH = 7
C.
pH > 7
D.
Cannot be determined
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Solution
Mixing equal volumes of 0.1 M HCl and 0.1 M NaOH results in a neutral solution with pH = 7.
Correct Answer: B — pH = 7
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Q. What is the role of auxins in plant growth?
A.
Promote flowering
B.
Stimulate root growth
C.
Inhibit growth
D.
Promote cell elongation
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Solution
Auxins are plant hormones that promote cell elongation, which is crucial for growth and development in plants.
Correct Answer: D — Promote cell elongation
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Q. What is the role of enzymes in biological reactions? (2023)
A.
Increase temperature
B.
Decrease activation energy
C.
Change the pH
D.
Provide energy
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Solution
Enzymes act as catalysts that lower the activation energy required for biochemical reactions, thus speeding them up.
Correct Answer: B — Decrease activation energy
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Q. What is the role of ribosomes in a cell?
A.
Energy production
B.
Protein synthesis
C.
DNA replication
D.
Cell division
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Solution
Ribosomes are the sites of protein synthesis, translating mRNA into polypeptide chains.
Correct Answer: B — Protein synthesis
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Q. What is the role of the respiratory system?
A.
To break down food
B.
To exchange gases
C.
To circulate blood
D.
To protect against pathogens
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Solution
The respiratory system is responsible for the exchange of gases, primarily oxygen and carbon dioxide, between the body and the environment.
Correct Answer: B — To exchange gases
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Q. What is the slope of the line represented by the equation y = 2x + 3?
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Solution
The slope of the line in the equation y = mx + b is m, which is 2.
Correct Answer: B — 2
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Q. What is the slope of the tangent line to the curve y = x^2 at the point (3, 9)? (2020)
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Solution
The derivative y' = 2x. At x = 3, y' = 2(3) = 6.
Correct Answer: B — 6
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Q. What is the solution to the equation 2x - 4 = 10? (2023)
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Solution
Adding 4 to both sides gives 2x = 14. Dividing by 2 gives x = 7.
Correct Answer: D — 6
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Q. What is the specific heat capacity of a substance if 500 J of heat is required to raise the temperature of 2 kg of the substance by 10°C? (2021)
A.
25 J/kg°C
B.
50 J/kg°C
C.
75 J/kg°C
D.
100 J/kg°C
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Solution
Specific heat capacity (c) = Q / (m * ΔT) = 500 J / (2 kg * 10°C) = 25 J/kg°C.
Correct Answer: B — 50 J/kg°C
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Q. What is the sum of the coefficients in the expansion of (x + 1)^8?
A.
256
B.
512
C.
128
D.
64
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Solution
The sum of the coefficients in the expansion of (x + 1)^n is given by (1 + 1)^n = 2^n. Here, n=8, so the sum is 2^8 = 256.
Correct Answer: B — 512
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Q. What is the sum of the first five prime numbers?
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Solution
The first five prime numbers are 2, 3, 5, 7, and 11. Their sum is 2 + 3 + 5 + 7 + 11 = 28.
Correct Answer: A — 28
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