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
Show solution
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
Learn More →
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
Show solution
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
Learn More →
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
Show solution
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
Learn More →
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
Show solution
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
Learn More →
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
Show solution
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
Learn More →
Q. Which of the following statements is true about the nucleus of an atom? (2019)
A.
It contains only protons
B.
It contains only neutrons
C.
It contains protons and neutrons
D.
It contains electrons
Show solution
Solution
The nucleus of an atom contains protons and neutrons, which are collectively known as nucleons.
Correct Answer: C — It contains protons and neutrons
Learn More →
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
Show solution
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
Learn More →
Q. Which of the following statements is true for a concave lens? (2019)
A.
It converges light rays
B.
It diverges light rays
C.
It forms real images
D.
It has a positive focal length
Show solution
Solution
A concave lens diverges light rays, and it has a negative focal length.
Correct Answer: B — It diverges light rays
Learn More →
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
Learn More →
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
Show solution
Solution
A galvanic cell converts chemical energy into electrical energy spontaneously.
Correct Answer: A — It converts chemical energy to electrical energy
Learn More →
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
Learn More →
Q. Which of the following statements is true for a real image formed by a concave lens? (2022)
A.
It can be projected on a screen
B.
It is always inverted
C.
It is always larger than the object
D.
It cannot be formed
Show solution
Solution
A concave lens always forms a virtual image that cannot be projected on a screen; hence, a real image cannot be formed.
Correct Answer: D — It cannot be formed
Learn More →
Q. Which of the following statements is true for an adiabatic process? (2022) 2022
A.
Heat is exchanged with the surroundings
B.
Work done is zero
C.
Temperature changes
D.
Pressure remains constant
Show solution
Solution
In an adiabatic process, there is no heat exchange with the surroundings, and the temperature of the system changes due to work done on or by the system.
Correct Answer: C — Temperature changes
Learn More →
Q. Which of the following statements is true for an isochoric process? (2023)
A.
Volume remains constant
B.
Pressure remains constant
C.
Temperature remains constant
D.
Heat is absorbed
Show solution
Solution
In an isochoric process, the volume of the system remains constant.
Correct Answer: A — Volume remains constant
Learn More →
Q. Which of the following statements is true for the complex [Fe(CN)6]3-? (2023)
A.
It is a high-spin complex
B.
It is a low-spin complex
C.
It has a coordination number of 4
D.
It is paramagnetic
Show solution
Solution
The complex [Fe(CN)6]3- is a low-spin complex due to the strong field nature of CN- ligands, resulting in paired electrons.
Correct Answer: B — It is a low-spin complex
Learn More →
Q. Which of the following statements is true regarding adsorption isotherms? (2020)
A.
They describe the relationship between pressure and volume.
B.
They describe the relationship between temperature and solubility.
C.
They describe the relationship between the amount of adsorbate and its pressure at constant temperature.
D.
They describe the relationship between the surface area and the mass of adsorbent.
Show solution
Solution
Adsorption isotherms describe the relationship between the amount of adsorbate on the adsorbent and its pressure at a constant temperature, illustrating how adsorption varies with pressure.
Correct Answer: C — They describe the relationship between the amount of adsorbate and its pressure at constant temperature.
Learn More →
Q. Which of the following statements is true regarding aldehydes? (2023)
A.
They cannot form hydrogen bonds
B.
They are generally more reactive than ketones
C.
They have higher boiling points than ketones
D.
They are less soluble in water than ketones
Show solution
Solution
Aldehydes are generally more reactive than ketones due to the presence of the hydrogen atom attached to the carbonyl carbon.
Correct Answer: B — They are generally more reactive than ketones
Learn More →
Q. Which of the following statements is true regarding an ideal gas? (2022)
A.
It has no volume
B.
It has no intermolecular forces
C.
It behaves according to the ideal gas law at all temperatures and pressures
D.
Both A and B
Show solution
Solution
An ideal gas is considered to have no volume and no intermolecular forces, making option D correct.
Correct Answer: D — Both A and B
Learn More →
Q. Which of the following statements is true regarding capacitors in parallel? (2022)
A.
Total capacitance is the sum of individual capacitances
B.
Total capacitance is the product of individual capacitances
C.
Total capacitance is always less than the smallest capacitance
D.
Total capacitance is independent of the voltage
Show solution
Solution
For capacitors in parallel, the total capacitance is the sum of the individual capacitances: C_total = C₁ + C₂ + ...
Correct Answer: A — Total capacitance is the sum of individual capacitances
Learn More →
Q. Which of the following statements is true regarding electric current? (2020)
A.
It flows from negative to positive
B.
It flows from positive to negative
C.
It does not require a closed circuit
D.
It is independent of voltage
Show solution
Solution
Electric current flows from positive to negative in a circuit.
Correct Answer: B — It flows from positive to negative
Learn More →
Q. Which of the following statements is true regarding exothermic reactions? (2021)
A.
They absorb heat.
B.
They release heat.
C.
They require energy input.
D.
They have a positive enthalpy change.
Show solution
Solution
Exothermic reactions release heat, resulting in a negative enthalpy change.
Correct Answer: B — They release heat.
Learn More →
Q. Which of the following statements is true regarding gravitational fields? (2022)
A.
Gravitational fields are always attractive
B.
Gravitational fields can be repulsive
C.
Gravitational fields are independent of mass
D.
Gravitational fields do not exist in space
Show solution
Solution
Gravitational fields are always attractive, pulling masses towards each other.
Correct Answer: A — Gravitational fields are always attractive
Learn More →
Q. Which of the following statements is true regarding ideal gases? (2023)
A.
They have no volume
B.
They attract each other
C.
They occupy no space
D.
They have mass
Show solution
Solution
Ideal gases are considered to have no volume and no intermolecular forces.
Correct Answer: A — They have no volume
Learn More →
Q. Which of the following statements is true regarding laminar flow?
A.
It occurs at high velocities
B.
It is characterized by smooth and orderly fluid motion
C.
It has a high Reynolds number
D.
It is turbulent in nature
Show solution
Solution
Laminar flow is characterized by smooth and orderly fluid motion, typically occurring at low velocities.
Correct Answer: B — It is characterized by smooth and orderly fluid motion
Learn More →
Q. Which of the following statements is true regarding reduction? (2020)
A.
It involves the gain of electrons
B.
It involves the loss of electrons
C.
It always occurs with oxidation
D.
Both A and C are correct
Show solution
Solution
Reduction is defined as the gain of electrons, and it always occurs simultaneously with oxidation in redox reactions.
Correct Answer: D — Both A and C are correct
Learn More →
Q. Which of the following statements is true regarding the Arrhenius equation? (2023)
A.
It relates temperature to the rate constant
B.
It is only applicable to zero-order reactions
C.
It does not include activation energy
D.
It is a linear equation
Show solution
Solution
The Arrhenius equation relates temperature to the rate constant and includes activation energy.
Correct Answer: A — It relates temperature to the rate constant
Learn More →
Q. Which of the following statements is true regarding the boiling points of aldehydes and ketones? (2023)
A.
Aldehydes have higher boiling points than ketones
B.
Ketones have higher boiling points than aldehydes
C.
Both have the same boiling points
D.
None of the above
Show solution
Solution
Ketones generally have higher boiling points than aldehydes due to stronger dipole-dipole interactions.
Correct Answer: B — Ketones have higher boiling points than aldehydes
Learn More →
Q. Which of the following statements is true regarding the complex [Ag(NH3)2]+? (2023)
A.
It is a tetrahedral complex.
B.
It is a square planar complex.
C.
It is a linear complex.
D.
It is an octahedral complex.
Show solution
Solution
[Ag(NH3)2]+ is a linear complex because silver (Ag) has a coordination number of 2 with two bidentate ligands.
Correct Answer: C — It is a linear complex.
Learn More →
Q. Which of the following statements is true regarding the complex [Cr(NH3)6]3+? (2023)
A.
It is tetrahedral
B.
It is octahedral
C.
It is square planar
D.
It has a coordination number of 4
Show solution
Solution
The complex [Cr(NH3)6]3+ is octahedral with a coordination number of 6, as it is surrounded by six ammonia ligands.
Correct Answer: B — It is octahedral
Learn More →
Q. Which of the following statements is true regarding the equilibrium constant? (2020)
A.
Kc is temperature dependent
B.
Kc is pressure dependent
C.
Kc is concentration dependent
D.
Kc is independent of temperature
Show solution
Solution
The equilibrium constant Kc is dependent on temperature; changing the temperature will change the value of Kc.
Correct Answer: A — Kc is temperature dependent
Learn More →
Showing 4711 to 4740 of 4967 (166 Pages)