Q. Which of the following is true about the roots of a cubic function?
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A.
It can have at most two real roots.
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B.
It can have at most three real roots.
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C.
It can have no real roots.
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D.
It must have at least one real root.
Solution
A cubic function can have at most three real roots, and it is guaranteed to have at least one real root due to the Intermediate Value Theorem.
Correct Answer: B — It can have at most three real roots.
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Q. Which of the following is true about the roots of a polynomial of odd degree?
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A.
It has an even number of roots.
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B.
It has at least one real root.
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C.
It has no real roots.
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D.
It has exactly two real roots.
Solution
A polynomial of odd degree must have at least one real root due to the Intermediate Value Theorem.
Correct Answer: B — It has at least one real root.
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Q. Which of the following is true about the roots of the polynomial P(x) = x^2 + 4x + 4?
-
A.
It has two distinct real roots.
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B.
It has one real root with multiplicity 2.
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C.
It has no real roots.
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D.
It has two complex roots.
Solution
The polynomial can be factored as (x + 2)^2, indicating it has one real root with multiplicity 2.
Correct Answer: B — It has one real root with multiplicity 2.
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Q. Which of the following is true about the roots of the polynomial x^2 + 4x + 4?
-
A.
It has two distinct real roots.
-
B.
It has one real root with multiplicity 2.
-
C.
It has no real roots.
-
D.
It has two complex roots.
Solution
The polynomial can be factored as (x + 2)(x + 2), indicating it has one real root with multiplicity 2.
Correct Answer: B — It has one real root with multiplicity 2.
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Q. Which of the following is true about the shear modulus of a material? (2023)
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A.
It measures the material's response to shear stress
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B.
It is always greater than Young's modulus
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C.
It is independent of temperature
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D.
It is the same as bulk modulus
Solution
Shear modulus (G) measures the material's response to shear stress, indicating how it deforms under such stress.
Correct Answer: A — It measures the material's response to shear stress
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Q. Which of the following is true about viruses? (2022)
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A.
They are prokaryotic
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B.
They can reproduce independently
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C.
They are acellular
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D.
They have a cellular structure
Solution
Viruses are acellular and cannot reproduce independently; they require a host cell.
Correct Answer: C — They are acellular
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Q. Which of the following is true for a satellite in a low Earth orbit?
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A.
It has a very high orbital speed
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B.
It has a very low orbital speed
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C.
It does not experience any gravitational force
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D.
It is not affected by atmospheric drag
Solution
A satellite in a low Earth orbit has a very high orbital speed due to the proximity to the Earth and the gravitational pull.
Correct Answer: A — It has a very high orbital speed
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Q. Which of the following is true for all angles A?
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A.
sin^2 A + cos^2 A = 1
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B.
tan A = sin A/cos A
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C.
sec A = 1/cos A
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D.
All of the above
Solution
All the given identities are true for all angles A.
Correct Answer: D — All of the above
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Q. Which of the following is true for an endothermic reaction?
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A.
Heat is released
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B.
ΔH is negative
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C.
ΔH is positive
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D.
The reaction is spontaneous
Solution
In an endothermic reaction, heat is absorbed, resulting in a positive ΔH.
Correct Answer: C — ΔH is positive
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Q. Which of the following is true for log_a(b) + log_a(c)?
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A.
log_a(bc)
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B.
log_a(b/c)
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C.
log_a(b-c)
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D.
log_a(b+c)
Solution
log_a(b) + log_a(c) = log_a(bc) by the product property of logarithms.
Correct Answer: A — log_a(bc)
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Q. Which of the following is true for log_a(bc)?
-
A.
log_a(b) + log_a(c)
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B.
log_a(b) - log_a(c)
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C.
log_a(bc) = log_a(b) * log_a(c)
-
D.
None of the above
Solution
log_a(bc) = log_a(b) + log_a(c) by the product rule of logarithms.
Correct Answer: A — log_a(b) + log_a(c)
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Q. Which of the following is true for the expression 2^(x+1) / 2^(x-1)? (2023)
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A.
2^2
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B.
2^0
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C.
2^1
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D.
2^3
Solution
Using the property of exponents, we have 2^(x+1 - (x-1)) = 2^(x+1-x+1) = 2^2.
Correct Answer: C — 2^1
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Q. Which of the following is true for the expression 2^(x+3) = 8? (2023)
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A.
x = 1
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B.
x = 2
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C.
x = 3
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D.
x = 0
Solution
Since 8 can be expressed as 2^3, we have 2^(x+3) = 2^3, thus x + 3 = 3, leading to x = 0.
Correct Answer: A — x = 1
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Q. Which of the following is true for the expression 4^(x+1) = 16? (2023)
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A.
x = 1
-
B.
x = 2
-
C.
x = 3
-
D.
x = 0
Solution
Since 16 can be expressed as 4^2, we have 4^(x+1) = 4^2, leading to x + 1 = 2, thus x = 1.
Correct Answer: A — x = 1
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Q. Which of the following is true for the identity (a + b)³?
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A.
a³ + b³
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B.
a³ + 3a²b + 3ab² + b³
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C.
a² + b²
-
D.
3ab
Solution
(a + b)³ = a³ + 3a²b + 3ab² + b³.
Correct Answer: B — a³ + 3a²b + 3ab² + b³
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Q. Which of the following is true for the identity (x + y)²?
-
A.
x² + y²
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B.
x² + 2xy + y²
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C.
x² - 2xy + y²
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D.
2xy
Solution
(x + y)² = x² + 2xy + y².
Correct Answer: B — x² + 2xy + y²
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Q. Which of the following is used as a flavoring agent in food? (2019)
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A.
Vanillin
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B.
Acetic acid
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C.
Sodium bicarbonate
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D.
Calcium sulfate
Solution
Vanillin is the primary component of the extract of the vanilla bean and is widely used as a flavoring agent in food.
Correct Answer: A — Vanillin
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Q. Which of the following is used to create a p-n junction? (2020)
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A.
Doping
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B.
Ionization
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C.
Sublimation
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D.
Condensation
Solution
Doping is the process used to create a p-n junction by adding impurities to a semiconductor.
Correct Answer: A — Doping
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Q. Which of the following isotopes is commonly used in nuclear reactors? (2021)
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A.
Uranium-238
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B.
Carbon-12
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C.
Hydrogen-1
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D.
Oxygen-16
Solution
Uranium-238 is commonly used as fuel in nuclear reactors due to its ability to undergo fission.
Correct Answer: A — Uranium-238
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Q. Which of the following kingdoms includes multicellular organisms that are autotrophic?
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A.
Monera
-
B.
Fungi
-
C.
Plantae
-
D.
Animalia
Solution
The kingdom Plantae includes multicellular organisms that are autotrophic.
Correct Answer: C — Plantae
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Q. Which of the following kingdoms includes organisms that are primarily autotrophic? (2019)
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A.
Animalia
-
B.
Fungi
-
C.
Plantae
-
D.
Protista
Solution
The kingdom Plantae includes organisms that are primarily autotrophic, meaning they produce their own food through photosynthesis.
Correct Answer: C — Plantae
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Q. Which of the following kingdoms includes organisms that can be both autotrophic and heterotrophic? (2019)
-
A.
Monera
-
B.
Fungi
-
C.
Plantae
-
D.
Protista
Solution
The kingdom Protista includes organisms that can be both autotrophic and heterotrophic.
Correct Answer: D — Protista
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Q. Which of the following kingdoms includes organisms that can be both unicellular and multicellular? (2022)
-
A.
Monera
-
B.
Fungi
-
C.
Plantae
-
D.
Protista
Solution
The kingdom Protista includes both unicellular and multicellular organisms.
Correct Answer: D — Protista
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Q. Which of the following kingdoms includes unicellular organisms? (2020)
-
A.
Animalia
-
B.
Plantae
-
C.
Fungi
-
D.
Protista
Solution
The kingdom Protista includes unicellular organisms.
Correct Answer: D — Protista
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Q. Which of the following kingdoms was known for its extensive trade routes connecting India to the Mediterranean?
-
A.
Maurya
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B.
Gupta
-
C.
Kushana
-
D.
Chola
Solution
The Kushana Empire was known for its extensive trade routes that connected India to the Mediterranean region.
Correct Answer: C — Kushana
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Q. Which of the following landforms is a result of glacial activity?
-
A.
Valley
-
B.
Cave
-
C.
Fjord
-
D.
Plateau
Solution
Fjords are deep, narrow inlets of the sea between high cliffs or steep slopes, formed by glacial activity.
Correct Answer: C — Fjord
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Q. Which of the following landforms is created by the action of glaciers?
-
A.
Delta
-
B.
Moraine
-
C.
Alluvial plain
-
D.
Loess
Solution
A moraine is a landform created by the accumulation of debris deposited by glaciers.
Correct Answer: B — Moraine
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Q. Which of the following landforms is formed by the deposition of sediment by rivers?
-
A.
Delta
-
B.
Mountain
-
C.
Plateau
-
D.
Valley
Solution
A delta is formed at the mouth of a river where it meets a body of water, and sediment is deposited.
Correct Answer: A — Delta
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Q. Which of the following lanthanides is used in making strong permanent magnets?
-
A.
Cerium
-
B.
Neodymium
-
C.
Samarium
-
D.
Europium
Solution
Neodymium is used in making strong permanent magnets due to its magnetic properties.
Correct Answer: B — Neodymium
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Q. Which of the following layers is liquid? (2019)
-
A.
Crust
-
B.
Mantle
-
C.
Outer Core
-
D.
Inner Core
Solution
The Outer Core is the only layer that is liquid, composed mainly of molten iron and nickel.
Correct Answer: C — Outer Core
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