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  

(a) K1K33/K2                         (b) K2K33/K1

(c) K1K2K3                             (d) K1K2/K3 

Concept Questions :-

KP/KC - Factors
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The pKa for acid A is greater than pKa for acid B. the strong acid is:

(a) acid A                                           (b) acid B

(c) are equally strong                          (d) none of these

Concept Questions :-

Acids & Bases - Definitions & Classification
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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

Concept Questions :-

KP/KC - Factors
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A solution of FeCl3 in water acts as acidic due to:

(a) acidic impurities                            (b) ionization

(c) hydrolysis of Fe3+                          (d) dissociation

Concept Questions :-

Salt Hydrolysis
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Which of the following solution does not act as buffer?

(a) H3PO4 + NaH2PO4

(b) Na2CO3 + H2CO3

(c) HCl + NH4Cl

(d) CH3COOH + CH3COONa

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Which equilibrium can be described as Lewis acid-base reaction but not Bronsted acid-base reaction?

(a) H2O + CH3COOHH3O+ + CH3COO-

(b) 2NH3 + H2SO4 2NH4+ + SO42-

(c) NH3 + CH3COOH NH4+ + CH3COO-

(d) [Cu(H2O)4]2+ + 4NH3  [Cu(NH3)4]2+ + 4H2O

Concept Questions :-

Acids & Bases - Definitions & Classification
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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

Concept Questions :-

KP/KC - Factors
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An aqueous solution of hydrogen sulphide shows the equilibrium,

           H2H+ + HS-

If dilute hydrochloic acid is added to an aqueous solution of hydrogen sulphide without any change in temperature, then:

(a) the equilibrium constant will change

(b) the concentration of HS- will increase

(c) the concentration of undissociated hydrogen sulphide will decrease

(d) the concentration of HS- will decrease

Concept Questions :-

Ki for Acid & Base
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When HCl gas is passed through a saturated solution of common salt, pure NaCl is precipitated because:

(a) the impurities dissolve in HCl

(b) HCl is highly soluble in H2O

(c) the product of [Na+] and [Cl-] exceeds the solubility product of NaCl

(d) the solubility product of NaCl is lowered by the chloride ion from aqueous HCl

Concept Questions :-

Solubility Product
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The aqueous solution of a salt is alkaline. This shows that salt is made from:

(a) a strong acid and strong base

(b) a strong acid and weak base

(c) a weak acid and weak base

(d) a weak acid and strong base

Concept Questions :-

Acids & Bases - Definitions & Classification
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