The pH of a solution obtained by mixing 100ml of 0.2 M CH3COOH with 100ml of 0.2 M NaOH would be (given pKa for CH3COOH = 4.74)

1. 4.74

2. 8.87

3. 9.10

4. 8.57

Subtopic:  pH calculation |
From NCERT
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For N2 + 3H2 2NH3, one mole of N2 and three moles of H2 are at pressure of 4 atm. Equilibrium pressure is found to be 3 atm. Hence, Kp is

1.    1/(0.5)x(0.15)3               2. 1/(0.5)x(1.5)3

3. 3x3/(0.5)x(1.5)3                 4. none of the above

Subtopic:  Kp, Kc & Factors Affecting them |
 62%
From NCERT
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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%
From NCERT
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To a 200 ml of 0.1 M weak acid HA solution 90 ml of 0.1 M solution of NaOH be added, Now, what volume of 0.1 M NaOH be added into above solution so that pH of resulting solution be 5.

[Ka(HA) = 10-5]

1. 2 ml               

2. 20 ml

3. 10 ml             

4. 15 ml

Subtopic:  pH calculation |
 57%
From NCERT
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Calculate the molar solublity of Fe(OH)2 at a pH of 8

[Ksp of Fe(OH)2 = 1.6 X 10-14]

1. 0.06

2. 0.016

3. 0.01

4. 0.16

Subtopic:  Kp, Kc & Factors Affecting them |
 73%
From NCERT
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The strongest Lewis acid among the following is:

1. BBr3

2. BCl3

3. BF3

4. All are same

Subtopic:  Acids & Bases - Definitions & Classification |
 51%
From NCERT
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When a solution of acetic acid was titrated with NaOH, the pH of the solution when half of the acid, neutralised was 4.2. Dissociation constant of the acid is

1. 6.31 × 10-5

2. 3.2 × 10-5

3. 8.7 × 10-8

4. 6.42 × 10-4

Subtopic:  pH calculation |
 52%
From NCERT
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A 20 litre container at 400 K contains CO2(g) at pressure 0.4 atm and an excess of SrO (neglect the volume of solid SrO). The volume of the container is now decreased by moving the movable piston fitted in the container. The maximum volume of the container, when the pressure of CO2 attains its maximum value, when the pressure of C02 attains its maximum value, will be

(Given that: SrCO3(s)  SrO(s) + CO2(g), (Kp =1.6 atm))

(1) 5 L

(2) 10 L

(3) 4L

(4) 2L

Subtopic:  Kp, Kc & Factors Affecting them |
 58%
From NCERT
NEET - 2017
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The concentration of the Ag+ ions in a saturated solution of Ag2C2O4 is 2.2 x 10-4 M. The solubility product of Ag2C2O4 is

1. 2.42 x 10-8

2. 2.66 x 10-12

3. 4.5 x 10-11

4. 5.3 x 10-12

Subtopic:  Solubility Product |
 53%
From NCERT
NEET - 2017
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The percentage of pyridine (C5H5N) that forms pyridinium ion (C5H5N+H) in a 0.10 M aqueous pyridine solution (Kb for C5H5N = 1.7 x 10-9) is

(1) 0.0060 %                 

(2) 0.013 %

(3) 0.77 %                     

(4) 1.6%

Subtopic:  Kp, Kc & Factors Affecting them |
 64%
NEET - 2016
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