For the reversible reaction,

N2 (g) + 3H2(g) 2NH3 (g) + heat

 the equilibrium shifts in forward direction                                   

(1) by increasing the concentration of NH3 (g) 

(2) by decreasing the pressure

(3) by decreasing the concentrations of N2 (g)and H2(g)

(4) by increasing pressure and decreassing temperature

 

Subtopic:  Le Chatelier's principle |
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Which is the strongest acid in the following?          

(a) H2SO4            (b) HClO3        (c) HClO4         (d) H2SO3 

Subtopic:  Acids & Bases - Definitions & Classification |
 77%
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The conjugate acid of NH2- is                           

(a) N2H4      (b) NH4+       (c) NH4OH        (d) NH3

Subtopic:  Acids & Bases - Definitions & Classification |
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A 50 ml solution of strong acid of pH = 1 is mixed with a 50 ml solution of strong acid of pH=2. The pH of the mixture will be nearly:                                                     

(log 5.5 = 0.74)

1. 0.74                   2. 1.26

3. 1.76                   4.  1.5

Subtopic:  pH calculation |
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The pH of a solution obtained by mixing 50ml of 0.4N HCl and 50ml of 0.2M NaOH is:

(1) 13

(2) 12

(3) 1.0

(4) 2.0

Subtopic:  pH calculation |
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In which of the following reaction the value of Kp will be equal to Kc ?

1. N2(g) + O2(g) 2NO(g)

2. PCl5(g)PCl3(g) + Cl2(g)

3. 2NH3(g)N2(g) +3H2(g)

4. 2SO2(g) + O2(g) 2SO3(g)

Subtopic:  Kp, Kc & Factors Affecting them |
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KpKc for the gaseous reaction:

I. 2A + 3B 2CII. 2A4BIII. A+B+2C 4D

Would be respectively:

(1) (RT)-3, (RT)2, (RT)0 

(2) (RT)-3, (RT)-2, (RT)-1 

(3) (RT)-3, (RT)2, (RT) 

(4) None of the above

Subtopic:  Kp, Kc & Factors Affecting them |
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How many grams of CaC2O4 (molecular weight =128) on dissolving in distilled water will give a saturated solution

[Ksp (CaC2O4) = 2.5x10-9 mol2l-2

1. 0.0064 g             2. 0.1280 g

3. 0.0128 g             4. 1.2800 g

Subtopic:  Solubility Product |
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Ostwald dilution law for weak electrolyte HA can be given as

(1) Ka=2(1-α)
(2) Ka = 2 if α0
(3) Ka = 2λ2(λ2-λ)
(4) All of the above

Subtopic:  Ionisation Constant of Acid, Base & Salt |
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If carbon dioxide is 2% dissociated at equilibrium 2CO2 (g)2CO(g) + O2(g). The mole fraction of CO2 at equuilibrium is

(1) 1.01/0.98            (2) 0.98/1.01

(3) 0.01/0.98            (4) 0.098/1.01

Subtopic:  Kp, Kc & Factors Affecting them |
 81%
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