The pKb of dimethylamine and pka of acetic acid are 3.27 and 4.77 respectively at T (K). The correct option for the pH of dimethylammonium acetate solution is:

1. 7.75

2. 6.25

3. 8.50

4. 5.50

Subtopic:  Salt Hydrolysis & Titration |
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Find out the solubility of NiOH2 in 0.1 M NaOH, given that the ionic product of NiOH2 is 2x 10-15 

1. 2 x 10-8 M.

2. 1 x 10-13 M

3. 1 x 108

4. 2 x 10-13 

Subtopic:  Solubility Product |
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Which of the following salt solutions is basic in nature?

1. Ammonium chloride

2. Ammonium sulphate

3. Ammonium nitrate

4. Sodium acetate

Subtopic:  Salt Hydrolysis & Titration |
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Which will make basic buffer:

1.  100 mL of 0.1 M HCl+100 mL of 0.1 M NaOH

2.  50 mL of 0.1 M NaOH+25 mL of 0.1 M CH3COOH

3.  100 mL of 0.1 M CH3COOH+100 mL of 0.1 M NaOH

4.  100 mL of 0.1 M HCl+200 mL of 0.1 M NH4OH

Subtopic:  Buffer |
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pH of a saturated solution of CaOH2 is 9. The solubility product Ksp of CaOH2 is:

1.  0.5×10-10

2.  0.5×10-15

3.  0.25×10-10

4.  0.125×10-15

Subtopic:  pH calculation |
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The conjugate bases of Bronsted acids H2O and HF are respectively:

1.  H3O+ and H2F+, respectively

2.  OH- and H2F+, respectively

3.  H3O+ and F-, respectively

4.  OH- and F-, respectively

Subtopic:  Acids & Bases - Definitions & Classification |
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The pH of a 0.01 M NaOH (aq) solution will be:

1. 7.01

2. 2

3. 12

4. 9

Subtopic:  pH calculation |
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Which of the following cannot act both as a Bronsted acid and as a Bronsted base?

1. HCO3-

2. NH3

3. HCl

4. HSO4-

Subtopic:  Acids & Bases - Definitions & Classification |
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The molar solubility of CaF2 (Ksp=5.3 x 10-11) in 0.1 M solution of NaF will be:

1. 5.3 x 10-11 mol L-1

2. 5.3 x 10-8 mol L-1

3. 5.3 x 10-9 mol L-1

4. 5.3 x 10-10 mol L-1

Subtopic:  Solubility Product |
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Following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations :
A)  60 mL M10HCI  + 40 mL M10NaOH
B)   55 mL M10HCI  + 45 mL M10NaOH
C)  75 mL M5HCI  + 25 mL M5NaOH
D)  100 mL M10HCI  + 100 mL M10NaOH
pH of which one of them will be equal to 1?
1. B
2. A
3. D
4. C

Subtopic:  pH calculation |
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