261. In a chemical equilibrium, the rate of the forward reaction:
a) Increases
b) Decreases
c) Becomes zero
d) Remains constant
262. Which of the following factors can affect the position of equilibrium?
a) Temperature
b) Pressure
c) Concentration of reactants and products
d) All of the above
263. The equilibrium constant (Kc) expression is defined as:
a) [Products] / [Reactants]
b) [Reactants] / [Products]
c) [Products] × [Reactants]
d) [Reactants] + [Products]
264. If the value of the equilibrium constant (Kc) is very large, it indicates that the equilibrium favors:
a) The reactants
b) The products
c) Both reactants and products in equal amounts
d) No reaction has occurred
265. The forward and reverse reactions occur at the same rate in a state of:
a) Dynamic equilibrium
b) Static equilibrium
c) Chemical imbalance
d) Non-equilibrium
266. What does a double-headed arrow between reactants and products in a chemical equation represent?
a) Reactants are greater than products
b) Products are greater than reactants
c) The reaction can proceed in both directions
d) The reaction cannot proceed
267. The equilibrium constant (Kc) for the reaction: N2 + 3H2 ⇌ 2NH3 is:
a) [NH3] / [N2] × [H2]^3
b) [NH3] / [N2] + [H2]^3
c) [N2] × [H2]^3 / [NH3]
d) [N2] + [H2]^3 / [NH3]
274. Solution is _ mixture of substances :
A. Homogeneous
B. Heterogeneous
C. Coarse
D. None of these
275. Which of the following is unstable and settles down on standing?
A. Solution
B. Colloidal solution
C. Suspension
D. All of these
276. Solution of different composition which exist in equilibrium:
A. Hypotonic solution
B. Conjugate solution
C. Hypertonic solution
D. Isotonic solution
277. Solubility of a solid in a liquid depends upon:
A. Nature of solute and solvent
B. Temperature
C. Pressure
D. Both A and B
278. Solubility of gas in liquid increases with an increase in:
A. Temperature
B. Pressure of gas
C. Volume of gas
D. All
279. Law which relates solubility of gas in liquid with pressure:
A. Henry’s law
B. Boyl’s law
C. Roult’s law
D. None of these
280. Solubility curve of which of the following salts is discontinuous:
A. NaCl
B. KCl
C. CaCl2·6H2O
D. KClO3
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