For the reaction, A+B3C at 25° C, a 3 litre vessel contains 1,2, 4 mole of A, B and C respectively. If Kc for the reaction is 10, the reaction will proceed in:

(a) forward direction                             (b) backward direction

(c) in either direction                            (d) in equilibrium

Concept Questions :-

Introduction To Equilibrium
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If K1 and K2 are the respective equilibrium constants for the two reactions,

       XeF6(g) + H2O(g) XeOF4(g) + 2HF(g)

       XeO4(g) + XeF6(g) XeOF4(g) + XeO3F(g)

The equilibrium constant for the reaction,

       XeO4(g) + 2HF(g)   XeO3F2(g) + H2O(g) is:

(a) K1K2                                           (b)  K1/K22

(c) K2/K1                                           (d) K1/K2

Concept Questions :-

Ki for Acid & Base
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The pH of 0.1M soution of the folowing salts increases in the order:

(a) NaCl < NH4Cl < NaCN < HCl

(b) HCl < NH4Cl < NaCl < NaCN

(c) NaCN < NH4Cl < NaCl < HCl

(d) HCl < NaCl < NaCN < NH4Cl 

Concept Questions :-

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Three reactions involving H2PO4- are given below:

(i) H3PO4 + H2H3O+H2PO4-

(ii) H2PO4- + H2HPO42- + H3O+

(iii) H2PO4- + OHH3PO4 +O2-

In which of the above does H2PO4-  act as an acid?

(a) (i) only                                 (b) (ii) only

(c) (i) and (ii)                             (d) (iii) only

Concept Questions :-

Acids & Bases - Definitions & Classification
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Which of the following is most soluble in water?

(a) MnS (Ksp = 8x10-37)         (b) ZnS (Ksp = 7x10-16)

(c) Bi2S3 (Ksp = 1x10-70)        (d) Ag2S (Ksp = 6x10-51)

Concept Questions :-

Solubility Product
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The compound that does not act as Lewis acid, is:

(a) AlCl3                                             (b) BF3

(c) NH3                                              (d) FeCl3

Concept Questions :-

Acids & Bases - Definitions & Classification
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For which salt the pH of its solution does not change with dilution?

(a) NH4Cl                            (b) CH3COONH4

(c) CH3COONa                    (d) None of these

Concept Questions :-

KP/KC - Factors
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The values of Kp1 and Kp2 for the reactions

            XY + Z            ........(i)and     A2B                 .........(ii)

are in ratio of 9:1, if degree of dissociation of X and A be equal, then total pressure at equilibrium (i) and (ii) are in the ratio 

(a) 3:1

(b) 1:9

(c) 36:1

(d) 1:1

Concept Questions :-

KP/KC - Factors
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For a sparingly soluble salt ApBq, the relationship of its solubility product (Ls) with its solubility (s) is:

(a) Ls =sp+q.pp.q                          (b)  Ls =sp+q.pq.qp  

(c) Ls =spq.pp.q                             (d)  Ls = spq.(pq)p+q

Concept Questions :-

Solubility Product
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For the reaction, N2 + 3H2 2NH3 in a vessel, after the addition of equal number of mole of N2 and H2, equilibrium state is formed. Which of the following is correct?

(a) [H2] = [N2]                                 (b) [H2] < [N2]     

(c) [H2] > [N2]                                 (d) [H2] > [NH3]      

Concept Questions :-

Introduction To Equilibrium
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