Chemical Equilibrium test 3

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A test from chapter 8 i.e Chemical Equilibrium of Chemistry part 1. This is Free online test for FSc and Entry test Preparation for UET, NUST, FAST, GIKI, PIEAS, NFC, Punjab University, UHS, other Engineering Universities and Medical Colleges.

1. For which system does the equilibrium constant, Kc has units of concentration

A) N2 + 3H2 2NH3
B) H2 + I2 2 HI
C) 2NO2 N2O4
D) 2HF H2 + F2

2. Which statement about the following equilibrium is correct 2SO2(g) + O2(g) 2SO3(g) D H = – 188.3 kJ mol–1

A) the value of Kp falls with a rise in temp
B) the value of Kp falls with increasing pressure
C) adding V2O5 catalyst increase the equilibrium yield of sulphur trioxide
D) the value of Kp is equal to Kc

3. The PH of 10–3 mole dm–3 of an aqueous solution of H2SO4 is

A) 3.0
B) 2.7
C) 2.0
D) 1.5

4. The solubility product of AgCl is 2.0 x 10–10 mole2 dm–6. The max concentration of Ag+ions in the solution is

A) 2.0 x 10–10 mol dm–3
B) 1.41 x 10–5 mol dm–3
C) 1.0 x 10–10 mol dm–3
D) 4.0 x 10–20 mol dm–3

5. An excess of aqueous silver nitrate to added to aqueous barium chloride and precipitate is removed by filtration what are the main ions in the filtrate

A) Ag+ and NO only
B) Ag+ and Ba2+ and NO3
C) Ba2+ and NO only
D) Ba+2 and NO and Cl–

6. For N2 + 3H2 2NH3

A) Kc = Kp
B) Kp = Kc RT
C) Kp = Kc (RT)–2
D) Kp = Kc (RT)–1

7. H2 + I2 2HI In the above equilibrium system, if the conc. of reactants of 25oC is increased, the value of Kc will

A) increase
B) decrease
C) remains constant
D) depends upon nature of reactants

8. In a chemical reaction, equilibrium is said to have established when

A) opposing reactions stops
B) concentrations of reactants and products are equal
C) rate constants of opposing reactions are equal
D) none

9. The relation between Kc and Kp is

A) Kc = Kp (RT) Dn
B) Kp = Kc (RT) Dn
C) Kp = Kc (RT) Dn
D) Kp = Kc

10. The precipitation occurs if the ionic concentration is

A) less than Ksp
B) more than Ksp
C) equal to Ksp
D) is present at any moment