Q. Which of the following statements is true about the image formed by a convex lens? (2021)
A.
Always real
B.
Always virtual
C.
Can be real or virtual
D.
Always inverted
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Solution
A convex lens can form both real and virtual images depending on the position of the object relative to the focal point.
Correct Answer: C — Can be real or virtual
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Q. Which of the following statements is true about the image formed by a plane mirror? (2022)
A.
It is real and inverted
B.
It is virtual and erect
C.
It is diminished
D.
It is always located behind the mirror
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Solution
The image formed by a plane mirror is virtual, erect, and located behind the mirror at the same distance as the object.
Correct Answer: B — It is virtual and erect
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Q. Which of the following statements is true about the inverse of a function?
A.
The inverse of a function is always a function.
B.
The inverse of a function is not necessarily a function.
C.
The inverse of a function is always linear.
D.
The inverse of a function cannot be graphed.
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Solution
The inverse of a function is a function only if the original function is one-to-one.
Correct Answer: B — The inverse of a function is not necessarily a function.
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Q. Which of the following statements is true about the kinetic molecular theory of gases?
A.
Gas particles have significant volume
B.
Gas particles attract each other
C.
Gas particles are in constant random motion
D.
Gas particles do not collide
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Solution
The kinetic molecular theory states that gas particles are in constant random motion.
Correct Answer: C — Gas particles are in constant random motion
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Q. Which of the following statements is true about the law of conservation of energy?
A.
Energy can be created
B.
Energy can be destroyed
C.
Energy can be transformed
D.
Energy is always lost
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Solution
The law of conservation of energy states that energy cannot be created or destroyed, but it can be transformed from one form to another.
Correct Answer: C — Energy can be transformed
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Q. Which of the following statements is true about the magnetic field due to a current-carrying loop? (2020)
A.
It is uniform everywhere
B.
It is strongest at the center of the loop
C.
It is zero at the center of the loop
D.
It is strongest at the edges of the loop
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Solution
The magnetic field due to a current-carrying loop is strongest at the center of the loop and decreases as you move away from the center.
Correct Answer: B — It is strongest at the center of the loop
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Q. Which of the following statements is true about the magnetic field due to a long straight conductor? (2020)
A.
It is uniform and constant
B.
It decreases with distance from the conductor
C.
It increases with distance from the conductor
D.
It is only present at the ends of the conductor
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Solution
The magnetic field due to a long straight conductor decreases with increasing distance from the conductor.
Correct Answer: B — It decreases with distance from the conductor
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Q. Which of the following statements is true about the magnetic field inside a solenoid? (2019)
A.
It is zero
B.
It is uniform and parallel to the axis
C.
It varies with distance from the center
D.
It is stronger at the ends
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Solution
Inside a long solenoid, the magnetic field is uniform and parallel to the axis of the solenoid, provided the solenoid is long enough.
Correct Answer: B — It is uniform and parallel to the axis
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Q. Which of the following statements is true about the molecular orbital theory?
A.
It only applies to diatomic molecules
B.
It explains the magnetic properties of molecules
C.
It does not consider electron spin
D.
It is less accurate than valence bond theory
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Solution
Molecular orbital theory explains the magnetic properties of molecules, particularly the presence of unpaired electrons.
Correct Answer: B — It explains the magnetic properties of molecules
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Q. Which of the following statements is true about the photoelectric effect?
A.
It requires a minimum frequency of light
B.
It occurs with any frequency of light
C.
It is independent of light intensity
D.
It can occur in a vacuum only
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Solution
The photoelectric effect requires a minimum frequency of light known as the threshold frequency.
Correct Answer: A — It requires a minimum frequency of light
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Q. Which of the following statements is true about the second law of thermodynamics?
A.
Energy can be created
B.
Entropy of an isolated system always decreases
C.
Entropy of an isolated system always increases
D.
Energy can be destroyed
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Solution
The second law of thermodynamics states that the total entropy of an isolated system can never decrease over time.
Correct Answer: C — Entropy of an isolated system always increases
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Q. Which of the following statements is true about thermal equilibrium?
A.
Heat flows from cold to hot
B.
Heat flows from hot to cold
C.
No heat flow occurs
D.
Temperature is irrelevant
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Solution
In thermal equilibrium, no heat flows between systems, meaning they are at the same temperature.
Correct Answer: C — No heat flow occurs
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Q. Which of the following statements is true according to molecular orbital theory?
A.
Bonding orbitals are higher in energy than antibonding orbitals.
B.
Bonding orbitals are lower in energy than antibonding orbitals.
C.
All molecular orbitals are degenerate.
D.
Molecular orbitals do not influence bond length.
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Solution
Bonding orbitals are lower in energy than antibonding orbitals, which is a fundamental principle of molecular orbital theory.
Correct Answer: B — Bonding orbitals are lower in energy than antibonding orbitals.
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Q. Which of the following statements is true according to Ohm's Law? (2019)
A.
Resistance is independent of temperature
B.
Voltage is inversely proportional to current
C.
Current is directly proportional to voltage
D.
Resistance increases with increasing current
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Solution
According to Ohm's Law, current (I) is directly proportional to voltage (V) when resistance (R) is constant.
Correct Answer: C — Current is directly proportional to voltage
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Q. Which of the following statements is true according to Raoult's Law?
A.
The vapor pressure of a solution is always higher than that of the pure solvent.
B.
The vapor pressure of a solution is lower than that of the pure solvent.
C.
Raoult's Law applies only to ideal solutions.
D.
The mole fraction of solute affects the vapor pressure of the solvent.
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Solution
Raoult's Law indicates that the vapor pressure of a solution is lower than that of the pure solvent due to the presence of solute.
Correct Answer: B — The vapor pressure of a solution is lower than that of the pure solvent.
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Q. Which of the following statements is true according to the first law of thermodynamics?
A.
Energy can be created or destroyed.
B.
Energy can only be transformed from one form to another.
C.
The total energy of an isolated system decreases.
D.
Heat and work are the same forms of energy.
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Solution
The first law of thermodynamics states that energy can only be transformed from one form to another, not created or destroyed.
Correct Answer: B — Energy can only be transformed from one form to another.
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Q. Which of the following statements is true according to the kinetic molecular theory?
A.
Gas particles have significant volume
B.
Gas particles are in constant motion
C.
Gas particles attract each other
D.
Gas particles do not collide
Show solution
Solution
According to the kinetic molecular theory, gas particles are in constant motion.
Correct Answer: B — Gas particles are in constant motion
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Q. Which of the following statements is true according to the kinetic theory of gases?
A.
Gas molecules occupy a fixed volume.
B.
Gas molecules have significant attractive forces between them.
C.
Gas molecules are in constant random motion.
D.
Gas molecules do not collide with each other.
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Solution
According to the kinetic theory, gas molecules are in constant random motion, which is a fundamental assumption of the theory.
Correct Answer: C — Gas molecules are in constant random motion.
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Q. Which of the following statements is true according to the second law of thermodynamics?
A.
Energy can be created
B.
Entropy of the universe decreases
C.
Heat cannot spontaneously flow from a colder body to a hotter body
D.
All processes are reversible
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Solution
The second law states that heat cannot spontaneously flow from a colder body to a hotter body, which implies that entropy of the universe tends to increase.
Correct Answer: C — Heat cannot spontaneously flow from a colder body to a hotter body
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Q. Which of the following statements is true based on the bar graph depicting the population of various cities?
A.
City A has a larger population than City B.
B.
City C has the smallest population.
C.
City D's population is equal to City A.
D.
City B is the most populous.
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Solution
The bar graph clearly shows that City A has a larger population than City B.
Correct Answer: A — City A has a larger population than City B.
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Q. Which of the following statements is true based on the bar graph depicting the population growth of cities?
A.
City A grew faster than City B
B.
City B had a steady growth
C.
City C's growth was the highest
D.
City D's growth was negative
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Solution
The bar graph clearly shows that City A experienced faster growth than City B.
Correct Answer: A — City A grew faster than City B
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Q. Which of the following statements is true based on the data in the table?
A.
Product D had the lowest sales in Q1
B.
Product A consistently outperformed Product B
C.
Product C had a spike in sales in Q3
D.
Product B's sales were the same in Q1 and Q3
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Solution
Product D had the lowest sales in Q1, as indicated in the table.
Correct Answer: A — Product D had the lowest sales in Q1
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Q. Which of the following statements is true for a converging lens?
A.
It can only form real images.
B.
It can only form virtual images.
C.
It can form both real and virtual images.
D.
It cannot form images.
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Solution
A converging lens can form both real images (when the object is outside the focal length) and virtual images (when the object is within the focal length).
Correct Answer: C — It can form both real and virtual images.
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Q. Which of the following statements is true for a convex lens?
A.
It can produce only real images.
B.
It can produce only virtual images.
C.
It can produce both real and virtual images.
D.
It has a negative focal length.
Show solution
Solution
A convex lens can produce both real images (when the object is outside the focal length) and virtual images (when the object is within the focal length).
Correct Answer: C — It can produce both real and virtual images.
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Q. Which of the following statements is true for a convex mirror? (2020)
A.
It forms real images
B.
It forms virtual images
C.
It has a negative focal length
D.
Both b and c
Show solution
Solution
A convex mirror always forms virtual images and has a negative focal length.
Correct Answer: D — Both b and c
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Q. Which of the following statements is true for a diverging lens?
A.
It always forms real images
B.
It can form virtual images
C.
It has a positive focal length
D.
It converges light rays
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Solution
A diverging lens (concave) can only form virtual images.
Correct Answer: B — It can form virtual images
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Q. Which of the following statements is true for a galvanic cell? (2020)
A.
It converts chemical energy to electrical energy
B.
It requires an external power source
C.
It is always non-spontaneous
D.
It operates at constant temperature only
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Solution
A galvanic cell converts chemical energy into electrical energy spontaneously.
Correct Answer: A — It converts chemical energy to electrical energy
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Q. Which of the following statements is true for a plane mirror? (2023)
A.
The image is real
B.
The image is virtual
C.
The image is inverted
D.
The image is smaller than the object
Show solution
Solution
A plane mirror always forms a virtual image that is the same size as the object and is erect.
Correct Answer: B — The image is virtual
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Q. Which of the following statements is true for a satellite in a stable orbit?
A.
It requires continuous propulsion.
B.
It moves in a straight line.
C.
It is acted upon by gravitational force.
D.
It has zero velocity.
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Solution
A satellite in a stable orbit is acted upon by gravitational force, which provides the necessary centripetal force to keep it in orbit.
Correct Answer: C — It is acted upon by gravitational force.
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Q. Which of the following statements is true for an adiabatic process?
A.
Heat is exchanged with the surroundings
B.
The system is insulated from heat transfer
C.
Temperature remains constant
D.
Pressure remains constant
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Solution
In an adiabatic process, the system is insulated from heat transfer, meaning no heat is exchanged with the surroundings.
Correct Answer: B — The system is insulated from heat transfer
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