Q. The capacitance of a parallel plate capacitor is given by which formula? (2020)
A.
C = ε₀A/d
B.
C = Q/V
C.
C = 1/(4πε₀r)
D.
C = V/I
Solution
The capacitance (C) of a parallel plate capacitor is given by the formula C = ε₀A/d, where A is the area of the plates and d is the separation between them.
Q. The concept of 'survival of the fittest' is most closely associated with which of the following?
A.
Lamarck
B.
Darwin
C.
Mendel
D.
Wallace
Solution
'Survival of the fittest' is a phrase often associated with Charles Darwin's theory of natural selection, emphasizing that those best adapted to their environment are more likely to survive and reproduce.
Q. The electric field between the plates of a parallel plate capacitor is given by which formula? (2020)
A.
E = V/d
B.
E = Q/A
C.
E = CV
D.
E = 1/(4πε₀r²)
Solution
The electric field (E) between the plates of a parallel plate capacitor is given by the formula E = V/d, where V is the voltage and d is the separation between the plates.
Q. The electric field between the plates of a parallel plate capacitor is given by which expression? (2020)
A.
E = V/d
B.
E = d/V
C.
E = CV
D.
E = Q/A
Solution
The electric field (E) between the plates of a parallel plate capacitor is given by the expression E = V/d, where V is the voltage and d is the distance between the plates.
Q. The electrochemical series is a list of: (2023)
A.
Reactions
B.
Electrodes arranged by standard electrode potential
C.
Ionic compounds
D.
Gases
Solution
The electrochemical series is a list of electrodes arranged by their standard electrode potentials, indicating their tendency to gain or lose electrons.
Correct Answer:
B
— Electrodes arranged by standard electrode potential
Q. The equation of state for an ideal gas is given by: (2022)
A.
PV = nRT
B.
PV = NkT
C.
PV = mRT
D.
PV = kT
Solution
The equation of state for an ideal gas is PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the universal gas constant, and T is the temperature in Kelvin.
Q. The equilibrium constant for the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g) is 4. What is the value of Kp? (2023)
A.
4
B.
16
C.
0.25
D.
0.0625
Solution
Kp can be calculated from Kc using the relation Kp = Kc(RT)^(Δn), where Δn is the change in moles of gas. Here, Δn = 2 - 3 = -1, so Kp = Kc(0.0821T)^(-1). Assuming standard conditions, Kp = 4 * (1/RT) = 16.
Q. The Faraday's first law of electrolysis states that: (2018)
A.
The mass of substance deposited is directly proportional to the current
B.
The voltage is directly proportional to the current
C.
The energy is conserved
D.
The temperature remains constant
Solution
Faraday's first law states that the mass of a substance deposited at an electrode is directly proportional to the quantity of electricity passed through the electrolyte.
Correct Answer:
A
— The mass of substance deposited is directly proportional to the current