Q. Which law states that the rate of heat transfer through a material is proportional to the temperature gradient?
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A.
Newton's Law of Cooling
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B.
Fourier's Law of Heat Conduction
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C.
Stefan-Boltzmann Law
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D.
Kirchhoff's Law
Solution
Fourier's Law of Heat Conduction states that the rate of heat transfer through a material is proportional to the temperature gradient.
Correct Answer: B — Fourier's Law of Heat Conduction
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Q. Which law states that the total energy in an isolated system remains constant?
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A.
Law of Conservation of Energy
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B.
Newton's First Law
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C.
Hooke's Law
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D.
Ohm's Law
Solution
The Law of Conservation of Energy states that the total energy in an isolated system remains constant.
Correct Answer: A — Law of Conservation of Energy
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Q. Which law states that the total energy of an isolated system remains constant?
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A.
First law of thermodynamics
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B.
Second law of thermodynamics
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C.
Zeroth law of thermodynamics
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D.
Third law of thermodynamics
Solution
The first law of thermodynamics states that the total energy of an isolated system remains constant.
Correct Answer: A — First law of thermodynamics
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Q. Which law states that the total enthalpy change for a reaction is the same, regardless of the number of steps taken?
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A.
First Law of Thermodynamics
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B.
Second Law of Thermodynamics
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C.
Hess's Law
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D.
Gibbs Free Energy
Solution
Hess's Law states that the total enthalpy change for a reaction is the same, regardless of the number of steps taken.
Correct Answer: C — Hess's Law
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Q. Which law states that the total enthalpy change for a reaction is the same, regardless of the number of steps in the reaction?
-
A.
First Law of Thermodynamics
-
B.
Second Law of Thermodynamics
-
C.
Hess's Law
-
D.
Gibbs Free Energy
Solution
Hess's Law states that the total enthalpy change for a reaction is the same, regardless of the number of steps in the reaction.
Correct Answer: C — Hess's Law
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Q. Which law states that the total entropy of an isolated system can never decrease over time?
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A.
Zeroth Law
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B.
First Law
-
C.
Second Law
-
D.
Third Law
Solution
The Second Law of Thermodynamics states that the total entropy of an isolated system can never decrease over time.
Correct Answer: C — Second Law
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Q. Which law states that the total pressure of a gas mixture is equal to the sum of the partial pressures of its components?
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A.
Dalton's Law
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B.
Boyle's Law
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C.
Charles's Law
-
D.
Avogadro's Law
Solution
Dalton's Law states that the total pressure of a gas mixture is equal to the sum of the partial pressures of its components.
Correct Answer: A — Dalton's Law
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Q. Which law states that the volume of a gas is directly proportional to its temperature at constant pressure?
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A.
Boyle's Law
-
B.
Charles's Law
-
C.
Avogadro's Law
-
D.
Ideal Gas Law
Solution
Charles's Law states that the volume of a gas is directly proportional to its absolute temperature at constant pressure.
Correct Answer: B — Charles's Law
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Q. Which level of protein structure is characterized by the arrangement of multiple polypeptide chains?
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A.
Primary structure
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B.
Secondary structure
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C.
Tertiary structure
-
D.
Quaternary structure
Solution
The quaternary structure of a protein refers to the arrangement and interaction of multiple polypeptide chains.
Correct Answer: D — Quaternary structure
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Q. Which level of protein structure is characterized by the overall 3D shape of a single polypeptide chain?
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A.
Primary structure
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B.
Secondary structure
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C.
Tertiary structure
-
D.
Quaternary structure
Solution
The tertiary structure of a protein refers to the overall 3D shape of a single polypeptide chain, determined by interactions among side chains.
Correct Answer: C — Tertiary structure
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Q. Which logic gate is equivalent to an AND gate followed by a NOT gate?
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A.
OR
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B.
NAND
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C.
NOR
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D.
XOR
Solution
The NAND gate is equivalent to an AND gate followed by a NOT gate, as it inverts the output of the AND gate.
Correct Answer: B — NAND
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Q. Which logic gate is represented by the symbol '⊕'?
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A.
AND Gate
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B.
OR Gate
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C.
NAND Gate
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D.
XOR Gate
Solution
The symbol '⊕' represents the XOR gate.
Correct Answer: D — XOR Gate
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Q. Which logic gate outputs true only when all inputs are false?
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A.
AND
-
B.
OR
-
C.
NOR
-
D.
NAND
Solution
The NOR gate outputs true (1) only when all inputs are false (0).
Correct Answer: C — NOR
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Q. Which logic gate outputs true only when all inputs are true?
-
A.
AND
-
B.
OR
-
C.
NOT
-
D.
NAND
Solution
The AND gate outputs true only when all its inputs are true.
Correct Answer: A — AND
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Q. Which logic gate outputs true only when all its inputs are true?
-
A.
AND Gate
-
B.
OR Gate
-
C.
NOT Gate
-
D.
NAND Gate
Solution
The AND gate outputs true only when all its inputs are true.
Correct Answer: A — AND Gate
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Q. Which logic gate outputs true only when both inputs are false?
-
A.
AND
-
B.
OR
-
C.
NAND
-
D.
NOR
Solution
The NOR gate outputs true only when both inputs are false.
Correct Answer: D — NOR
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Q. Which material has the highest resistivity?
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A.
Copper
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B.
Aluminum
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C.
Iron
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D.
Rubber
Solution
Rubber has a much higher resistivity compared to metals like copper, aluminum, and iron.
Correct Answer: D — Rubber
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Q. Which material has the lowest resistivity?
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A.
Copper
-
B.
Aluminum
-
C.
Silver
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D.
Iron
Solution
Silver has the lowest resistivity among common materials.
Correct Answer: C — Silver
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Q. Which measure of dispersion is affected by extreme values?
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A.
Range
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B.
Variance
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C.
Standard Deviation
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D.
All of the above
Solution
All of these measures are affected by extreme values in the data set.
Correct Answer: D — All of the above
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Q. Which measure of dispersion is not affected by extreme values?
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A.
Range
-
B.
Variance
-
C.
Standard Deviation
-
D.
Interquartile Range
Solution
Interquartile Range is not affected by extreme values.
Correct Answer: D — Interquartile Range
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Q. Which modulation technique is most commonly used in digital communication systems?
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A.
Amplitude Modulation (AM)
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B.
Frequency Modulation (FM)
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C.
Phase Shift Keying (PSK)
-
D.
Quadrature Amplitude Modulation (QAM)
Solution
Quadrature Amplitude Modulation (QAM) is widely used in digital communication systems due to its efficiency in transmitting data.
Correct Answer: D — Quadrature Amplitude Modulation (QAM)
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Q. Which modulation technique is most commonly used in FM radio broadcasting?
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A.
Amplitude Modulation
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B.
Frequency Modulation
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C.
Phase Modulation
-
D.
Pulse Code Modulation
Solution
Frequency Modulation (FM) is the standard technique used in FM radio broadcasting due to its resistance to noise.
Correct Answer: B — Frequency Modulation
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Q. Which modulation technique is most commonly used in television broadcasting?
-
A.
Amplitude Modulation (AM)
-
B.
Frequency Modulation (FM)
-
C.
Phase Modulation (PM)
-
D.
Pulse Code Modulation (PCM)
Solution
Frequency Modulation (FM) is commonly used in television broadcasting due to its better noise immunity.
Correct Answer: B — Frequency Modulation (FM)
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Q. Which modulation technique is used to transmit digital data over an analog channel?
-
A.
AM
-
B.
FM
-
C.
PSK
-
D.
ASK
Solution
Phase Shift Keying (PSK) is a modulation technique used to transmit digital data over an analog channel.
Correct Answer: C — PSK
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Q. Which modulation technique varies the amplitude of the carrier signal?
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A.
Frequency Modulation
-
B.
Amplitude Modulation
-
C.
Phase Modulation
-
D.
Pulse Modulation
Solution
Amplitude Modulation (AM) varies the amplitude of the carrier signal.
Correct Answer: B — Amplitude Modulation
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Q. Which molecule exhibits sp hybridization?
-
A.
CCl4
-
B.
CO2
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C.
NH3
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D.
H2O
Solution
In CO2, the carbon atom is sp hybridized as it forms two double bonds with oxygen.
Correct Answer: B — CO2
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Q. Which molecule has a bent shape due to lone pairs?
-
A.
CO2
-
B.
O3
-
C.
CH4
-
D.
BF3
Solution
O3 (ozone) has a bent shape due to the presence of a lone pair on the central oxygen atom.
Correct Answer: B — O3
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Q. Which molecule has a central atom with dsp3 hybridization?
-
A.
SF6
-
B.
PCl5
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C.
NH3
-
D.
CCl4
Solution
PCl5 has phosphorus in the center, which is dsp3 hybridized, leading to a trigonal bipyramidal geometry.
Correct Answer: B — PCl5
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Q. Which molecule has a central atom with sp hybridization?
-
A.
CO2
-
B.
H2O
-
C.
NH3
-
D.
CCl4
Solution
In CO2, the carbon atom is sp hybridized, forming two double bonds with oxygen.
Correct Answer: A — CO2
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Q. Which molecule has a square planar geometry?
-
A.
XeF4
-
B.
SF4
-
C.
ClF3
-
D.
NH4+
Solution
XeF4 has four bonding pairs and two lone pairs, leading to a square planar geometry.
Correct Answer: A — XeF4
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