# General Science MCQ – 79 (Chemistry)

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1. What will be the value of Kp if the Kc is 26 for a reaction, PCl5 ⇌ PCl3 + Cl2 at 25o°?
(A) 0.57
(B) 0.46
(C) 0.83
(D) 0.61

2. For which of the following reaction Kp is less than Kc?
(A) 2HI ⇌ H2 + I2
(B) N2 + O2 ⇌ 2NO
(C) N2O4 ⇌ 2NO2
(D) 2SO2 + O2 ⇌ 2SO3

3. Two moles of PCl5 were heated to 400o in 2 litres closed vessel. At equilibrium, 40% of PCI5 was dissociated into PCI5 and2. Its Kc will be?
(A) 3.75 mol/L
(B) 0.533 mol/L
(C) 0.267 mol/L
(D) None of the above

4. Which of the following is not correct?
(A) Large value of K indicates large amount of products
(B) Small value of K indicates large amount of products
(C) For K > 1 amount reactants > amount of products
(D) None of the above

5. When Q (concentration quotient) is smaller than equilibrium constant?
(A) Reaction will be in equilibrium
(B) Reaction will be in forward direction
(C) Reaction will be in backward direction
(D) None of the above

6. If Kp and Kc are in equilibrium constants in terms of parts pressure and concentrate?
(A) Kp = Kc/RT
(B) Kp = KcRT
(C) Kp = Kc/(RT)𐤃n
(D) Kp = Kc(RT)𐤃n

7. For a reaction in equilibrium?
(A) Q (concentration quotient) = K (equilibrium constant)
(B) Q > K
(C) Q < K
(D) None of the above

8. Active mass in the law of mass action is?
(A) Molar concentration
(B) Absolute concentration
(C) Concentration at 0oC
(D) Molar mass

9. The mass of a gas dissolved in a given mass of a solvent at any temperature is directly proportional to?
(A) Pressure of gas
(B) Volume of gas
(C) Density of gas
(D) None of the above

10. Which of the following is an example of solid-solution equilibrium?
(A) Dissolution of sugar in water
(B) Melting of ice
(C) Evaporation of water in a closed vessel
(D) None of the above

General Science MCQ – 78 (Biology)