The equilibrium, 2SO2 (g) + O2 (g2SO3 (g)

shifts forward if:

(1) a catalyst is used

(2) an absorbent is used to remove SO3 as soon as it is formed

(3) small amounts of reactants are used

(4) none of the above

Subtopic:  Le Chatelier's principle |
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The pH of blood is maintained by CO2 by and H2CO3 in the body and chemical constituents of blood. This phenomenon is called:

(a) colloidal                            (b) buffer action

(c) acidic                                (d) salt balance

Subtopic:  Buffer |
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At temperature T, a compound AB2 (g) dissociates according to the reaction 2AB22AB(g) +B2(g) with a degree of dissociation x, which is small compared with unity. The expression for Kp, in terms of x and the total pressure P , is:

(1) Px3/2

(2) Px2/3

(3) Px3/3

(4) Px2/2

Subtopic:  Kp, Kc & Factors Affecting them |
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For the reactions,

 B;                                  Kc = 2

 C;                                  Kc = 4

 D;                                  Kc = 6

Kc for the reaction, A  D is:

(a) (2+4+6)                       (b) (2x4)/6

(c) (4x6)/2                         (d) 2x4x6

Subtopic:  Introduction To Equilibrium |
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Which of the following salts will give highest pH in water?                   

1. KCl           

2. NaCl         

3. Na2CO3     

4. CuSO4

Subtopic:  pH calculation |
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Aqueous solution of which salt has the lowest pH?

(1) NaOH                 

(2) NH4Cl

(3) Na2CO3               

(4) NaCl

Subtopic:  pH calculation |
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 The following equilibria are given

 N2 + 3H2  2NH3,      K1

N2 + O2  2NO,          K2

H212O2  H2O,       K3

The equilibrium constant of the reaction, 2NH352O2  2NO + 3H2O in terms of  K1, K2 and K3 is  

(1) K1K33/K2                         

(2) K2K33/K1

(3) K1K2K3                            

(4) K1K2/K3 

Subtopic:  Kp, Kc & Factors Affecting them |
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At a certain temperature, 2HI H2 +I2 only 50% HI is dissociated at equilibrium. The equilibrium constant is:

(a) 1.0                     (b) 3.0                 (c) 0.5               (d)   0.25

Subtopic:  Kp, Kc & Factors Affecting them |
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In the reaction, PCl5PCl3 + Cl2, the amounts of PCl5, PCl3 and Cl2 at equilibrium are 2 mole each and the total pressure is 3 atm. The equilibrium constant Kp is:

(a) 1.0 atm                                        (b) 2.0 atm

(c) 3.0 atm                                        (d) 6.0 atm

Subtopic:  Kp, Kc & Factors Affecting them |
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On addition of an inert gas at constant volume to the reaction, N2 + 3H22NH3 at  equilibrium:

(1) the reaction halts

(2) forward reaction is favoured

(3) the reaction remains unaffected

(4) backward reaction is favoured

Subtopic:  Le Chatelier's principle |
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