A buffer solution is prepared by mixing 20 ml of 0.1 M CH3COOH and 40 ml of 0.5 M CH3COONa and then diluted by adding 100 ml of distilled water. The pH of the resulting buffer solution is (Given pKa CH3COOH=4.76)

1. 5.76

2. 3.67

3. 2.48

4. 4.76

Subtopic:  pH calculation |
 62%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

An acid-base indicator has Ka=3.0×10-5. The acid form of the indicator is red and the basic form is blue. The [H+] required to change the indicator from 75% red to 75% blue is

1. 8×10-5 M

2. 9×10-5 M

3. 1×10-5 M

4. 3×10-4 M

Subtopic:  Salt Hydrolysis & Titration |
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The self-ionization constant for pure formic acid, K = [\(H C O O H_{2}^{+} \left]\right. \left[\right. H C O O^{-} \left]\right.\) ] has been estimated as \(\left(10\right)^{- 4}\) at room temperature. The percentage of formic acid molecules in pure formic acid that are converted to formate ions is

\(\left(\right. Given : d_{HCOOH} = 1 . 22\ g / cc \left.\right)\)

1. 0.0185%

2. 0.0073%

3. 0.074%

4. 0.037%

Subtopic:  Ionisation Constant of Acid, Base & Salt |
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

AgOH is added to NaCl solution to form AgCl precipitate. After the precipitation, the pH of the solution is 8. The [Cl-] is (Ksp of AgCl=10-12, Ksp of AgOH=10-10)

1. 10-6 M

2. 10-4 M

3. 10-8 M

4. 10-10 M

Subtopic:  pH calculation |
 58%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

For the reaction 
[Ag(CN)2]-(aq)Ag+(aq)+2CN-(aq),the equilibrium constant at 25°C is 4.0×10-19. The silver ion concentration in a solution that was originally 0.10 M in KCN and 0.03 M in AgNO3 will be:

1. 2.5×10-18 M

2. 1.5×10-18 M

3. 5.5×10-18 M

4. 7.5×10-18 M

Subtopic:  Salt Hydrolysis & Titration |
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Separate solutions of four sodium salts NaW, NaX, NaY and NaZ had pH 7.0, 9.0, 10.0 and 11.0 respectively. When each solution is 0.1 M, the strongest acid is

1. HW

2. HX

3. HY

4. HZ

Subtopic:  pH calculation |
 79%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Silver acetate is a slightly soluble salt of a weak acid (Ka=1.75×10-5). At 25°C, 100 g of water dissolves 1.04 g of crystalline silver acetate. The density of saturated solution of silver acetate at 20°C is 1.01 g/cc. The solubility product constant for silver acetate at 20°C

1. 2.43×10-3

2. 3.87×10-3

3. 7.74×10-5

4. 1.35×10-5

Subtopic:  Salt Hydrolysis & Titration |
 63%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

0.1 M solution of three different sodium salts NaX, NaY and NaZ have pH values 7.0, 9.0 and 11.0 respectively. The correct order of dissociation constant values of these acids is

1. KHX<KHY<KHZ

2. KHX>KHY>KHZ

3. KHX>KHZ>KHY

4. KHX<KHY<KHZ

Subtopic:  Ionisation Constant of Acid, Base & Salt |
 73%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

When equal volume of the following solutions are mixed, which of the following gives maximum precipitate? (Ksp of AgCl=10-12)

1. 10-4 MAg+ and 10-4 M Cl-

2. 10-3 MAg+ and 10-3 M Cl-

3. 10-5 MAg+ and 10-5 M Cl-

4. 10-6 MAg+ and 10-6 M Cl-

Subtopic:  Solubility Product |
 65%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The percentage hydrolysis of NaCN in (N80) aqueous solution [Dissociation constant of HCN is 1.3×10-9 and Kw=1.0×10-14] is

1. 8.2

2. 9.6

3. 5.26

4. 2.48

Subtopic:  Salt Hydrolysis & Titration |
 61%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints