Q. What is the effect of adding a common ion on the solubility of a salt? (2020)
A.
Increases solubility
B.
Decreases solubility
C.
No effect
D.
Depends on temperature
Show solution
Solution
Adding a common ion decreases the solubility of a salt due to the common ion effect, which shifts the equilibrium to the left.
Correct Answer: B — Decreases solubility
Learn More →
Q. What is the effect of adding a non-volatile solute to a solvent? (2023)
A.
Increases vapor pressure
B.
Decreases boiling point
C.
Increases boiling point
D.
Decreases freezing point
Show solution
Solution
Adding a non-volatile solute to a solvent increases the boiling point of the solution due to the colligative property of boiling point elevation.
Correct Answer: C — Increases boiling point
Learn More →
Q. What is the effect of increasing pressure on a gas at constant temperature? (2014)
A.
Volume increases
B.
Volume decreases
C.
No effect on volume
D.
Gas becomes a liquid
Show solution
Solution
According to Boyle's Law, increasing pressure on a gas at constant temperature results in a decrease in volume.
Correct Answer: B — Volume decreases
Learn More →
Q. What is the effect of increasing temperature on chemisorption? (2022)
A.
Increases adsorption
B.
Decreases adsorption
C.
No effect
D.
Depends on the gas
Show solution
Solution
Chemisorption is an exothermic process, and increasing temperature generally decreases the extent of chemisorption.
Correct Answer: B — Decreases adsorption
Learn More →
Q. What is the effect of increasing temperature on the volume of a gas at constant pressure?
A.
Volume decreases
B.
Volume increases
C.
Volume remains constant
D.
Volume fluctuates
Show solution
Solution
According to Charles's Law, increasing the temperature of a gas at constant pressure increases its volume.
Correct Answer: B — Volume increases
Learn More →
Q. What is the effect of increasing the capacitance in a capacitive AC circuit on the current? (2022)
A.
Increases current
B.
Decreases current
C.
No effect
D.
Current becomes zero
Show solution
Solution
Increasing capacitance increases the current in a capacitive AC circuit, as current I = V/Xc.
Correct Answer: A — Increases current
Learn More →
Q. What is the effect of increasing the current in a coil on the magnetic field produced? (2022)
A.
Increases the magnetic field
B.
Decreases the magnetic field
C.
No effect
D.
Reverses the magnetic field
Show solution
Solution
Increasing the current in a coil increases the magnetic field produced by the coil.
Correct Answer: A — Increases the magnetic field
Learn More →
Q. What is the effect of increasing the current in a solenoid on its magnetic field strength? (2021)
A.
Increases
B.
Decreases
C.
No effect
D.
Reverses direction
Show solution
Solution
Increasing the current in a solenoid increases its magnetic field strength, as the magnetic field is directly proportional to the current.
Correct Answer: A — Increases
Learn More →
Q. What is the effect of increasing the frequency on the capacitive reactance in an AC circuit? (2022)
A.
Increases
B.
Decreases
C.
Remains the same
D.
Becomes zero
Show solution
Solution
Capacitive reactance Xc = 1/(2πfC), so increasing frequency decreases Xc.
Correct Answer: B — Decreases
Learn More →
Q. What is the effect of increasing the frequency on the impedance of a capacitor? (2023)
A.
Increases
B.
Decreases
C.
Remains constant
D.
Becomes infinite
Show solution
Solution
The impedance of a capacitor decreases with increasing frequency.
Correct Answer: B — Decreases
Learn More →
Q. What is the effect of increasing the frequency on the inductive reactance in an AC circuit? (2022)
A.
Increases
B.
Decreases
C.
Remains the same
D.
Becomes zero
Show solution
Solution
Inductive reactance Xl = ωL increases with frequency since Xl = 2πfL.
Correct Answer: A — Increases
Learn More →
Q. What is the effect of increasing the frequency on the total impedance of an RLC circuit? (2020)
A.
It always increases
B.
It always decreases
C.
It can increase or decrease
D.
It remains constant
Show solution
Solution
The total impedance can increase or decrease depending on the relationship between R, XL, and XC as frequency changes.
Correct Answer: C — It can increase or decrease
Learn More →
Q. What is the effect of increasing the number of turns in a coil on the magnetic field strength produced by it? (2022)
A.
Increases the field strength
B.
Decreases the field strength
C.
No effect
D.
Reverses the field direction
Show solution
Solution
Increasing the number of turns in a coil increases the magnetic field strength produced by it, as the field strength is directly proportional to the number of turns.
Correct Answer: A — Increases the field strength
Learn More →
Q. What is the effect of increasing the slit width in a single-slit diffraction experiment? (2021)
A.
Fringe width increases
B.
Fringe width decreases
C.
No effect on fringe width
D.
Fringe pattern disappears
Show solution
Solution
Increasing the slit width decreases the fringe width because the angle of diffraction decreases.
Correct Answer: B — Fringe width decreases
Learn More →
Q. What is the effect of increasing the temperature on the solubility of most solid solutes in water? (2023)
A.
Increases solubility
B.
Decreases solubility
C.
No effect
D.
Depends on the solute
Show solution
Solution
For most solid solutes, increasing the temperature increases their solubility in water.
Correct Answer: A — Increases solubility
Learn More →
Q. What is the effect of temperature on chemisorption? (2023)
A.
Increases with temperature
B.
Decreases with temperature
C.
Remains constant
D.
Depends on the gas
Show solution
Solution
Chemisorption typically decreases with an increase in temperature because it involves the formation of stronger chemical bonds, which are less favorable at higher thermal energies.
Correct Answer: B — Decreases with temperature
Learn More →
Q. What is the effect of temperature on chemisorption? (2023) 2023
A.
Increases with temperature
B.
Decreases with temperature
C.
Remains constant
D.
Depends on the gas
Show solution
Solution
Chemisorption typically decreases with an increase in temperature because it involves the formation of stronger chemical bonds, which are less favorable at higher thermal energies.
Correct Answer: B — Decreases with temperature
Learn More →
Q. What is the effect of temperature on the cell potential according to the Nernst equation?
A.
Increases with temperature
B.
Decreases with temperature
C.
No effect
D.
Depends on the reaction
Show solution
Solution
According to the Nernst equation, the cell potential generally increases with temperature.
Correct Answer: A — Increases with temperature
Learn More →
Q. What is the effect of temperature on the magnetism of ferromagnetic materials? (2022)
A.
Increases magnetism
B.
Decreases magnetism
C.
No effect
D.
Reverses magnetism
Show solution
Solution
Increasing temperature generally decreases the magnetism of ferromagnetic materials, as thermal agitation disrupts the alignment of magnetic domains.
Correct Answer: B — Decreases magnetism
Learn More →
Q. What is the effect on the fringe separation in a double-slit experiment if the distance between the slits and the screen is increased? (2021)
A.
Fringe separation decreases
B.
Fringe separation increases
C.
Fringe separation remains the same
D.
Fringe separation becomes zero
Show solution
Solution
Fringe separation is directly proportional to the distance from the slits to the screen. Increasing this distance increases the fringe separation.
Correct Answer: B — Fringe separation increases
Learn More →
Q. What is the effect on the total resistance in a series circuit if one resistor is removed? (2023)
A.
Increases
B.
Decreases
C.
Remains the same
D.
Becomes zero
Show solution
Solution
Removing a resistor from a series circuit decreases the total resistance since the sum of the remaining resistances is less.
Correct Answer: B — Decreases
Learn More →
Q. What is the efficiency of a Carnot engine operating between 300 K and 600 K? (2022)
A.
0.5
B.
0.33
C.
0.25
D.
0.67
Show solution
Solution
Efficiency = 1 - (T_c/T_h) = 1 - (300/600) = 0.5.
Correct Answer: A — 0.5
Learn More →
Q. What is the efficiency of a Carnot engine operating between 500 K and 300 K? (2022)
A.
0.4
B.
0.5
C.
0.6
D.
0.7
Show solution
Solution
Efficiency = 1 - (T2/T1) = 1 - (300/500) = 0.4 or 40%.
Correct Answer: C — 0.6
Learn More →
Q. What is the efficiency of a Carnot engine operating between a hot reservoir at 600 K and a cold reservoir at 300 K?
A.
0.5
B.
0.33
C.
0.25
D.
0.75
Show solution
Solution
Efficiency (η) = 1 - (T_c/T_h) = 1 - (300/600) = 0.5 or 50%.
Correct Answer: B — 0.33
Learn More →
Q. What is the efficiency of a Carnot engine operating between temperatures of 500 K and 300 K?
A.
0.4
B.
0.5
C.
0.6
D.
0.7
Show solution
Solution
Efficiency (η) = 1 - (T2/T1) = 1 - (300/500) = 0.4 or 40%.
Correct Answer: C — 0.6
Learn More →
Q. What is the efficiency of a Carnot engine operating between temperatures T1 and T2? (2019) 2019
A.
(T1 - T2) / T1
B.
T2 / T1
C.
(T1 - T2) / T2
D.
1 - (T2 / T1)
Show solution
Solution
The efficiency (η) of a Carnot engine is given by η = 1 - (T2 / T1), where T1 is the higher temperature and T2 is the lower temperature.
Correct Answer: D — 1 - (T2 / T1)
Learn More →
Q. What is the electric field due to a point charge at a distance 'r' from it? (2021)
A.
k * q / r^2
B.
k * q / r
C.
k * q * r
D.
k * q * r^2
Show solution
Solution
The electric field (E) due to a point charge (q) at a distance (r) is given by E = k * q / r^2, where k is Coulomb's constant.
Correct Answer: A — k * q / r^2
Learn More →
Q. What is the electric field due to a point charge of +3 µC at a distance of 0.3 m?
A.
30 N/C
B.
90 N/C
C.
300 N/C
D.
900 N/C
Show solution
Solution
E = k * |q| / r^2 = (9 × 10^9) * (3 × 10^-6) / (0.3)^2 = 90 N/C.
Correct Answer: B — 90 N/C
Learn More →
Q. What is the electric potential at a point 0.4 m away from a charge of +5 µC?
A.
45 V
B.
50 V
C.
55 V
D.
60 V
Show solution
Solution
V = k * q / r = (9 × 10^9) * (5 × 10^-6) / 0.4 = 112.5 V.
Correct Answer: B — 50 V
Learn More →
Q. What is the electric potential at a point due to a charge Q at a distance r? (2021)
A.
kQ/r
B.
kQr
C.
kQ/r^2
D.
0
Show solution
Solution
The electric potential (V) at a distance r from a point charge Q is given by V = kQ/r.
Correct Answer: A — kQ/r
Learn More →
Showing 1381 to 1410 of 2235 (75 Pages)