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 |
 70%
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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 |
 74%
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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 |
 91%
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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 |
 89%
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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 |
 73%
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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 |
 76%
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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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Which of the following is least likely to behave as Lewis base?
(1) NH3

(2) BF3

(3) OH-

(4) H2O

Subtopic:  Ionisation Constant of Acid, Base & Salt | Acids & Bases - Definitions & Classification |
 85%
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In which of the following equilibrium Kc and Kp are not equal?

(1) 2NO(g) N2(g) + O2(g)

(2) SO2(g) + NO2(g) SO3(g) + NO(g)

(3) H2(g) + I2(g) 2HI(g)

(4) 2C(s) + O2(g) 2CO2(g)

Subtopic:  Kp, Kc & Factors Affecting them |
 94%
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Which one of the following molecular hydrides acts as a Lewis acid?

(1) NH3         

(2) H2O         

(3) B2H6           

(4) CH4

Subtopic:  Acids & Bases - Definitions & Classification |
 85%
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NEET - 2010
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