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Objective Questions
GS
GS Set-1
Chemistry
Physical Chemistry
258

Physical Chemistry MCQ with Answers

258) The pH at the equivalence point of a titration may differ from 7 because of:

The self ionisation of water

Hydrolysis of the salt formed

The indicator used

The concentration of the standard solution

Answer is:

Hydrolysis of the salt formed

Explanation:

Saly hydrolysis affects the pH of the solution.

Physical Chemistry MCQ with Answers

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259) The hydrogen ion concentration of 0.06M benzoic acid solution will be: (K_a = 6 x 10⁻³)

0.6 x 10⁻⁴

6 x 10⁻⁴

3.6 x 10⁻⁴

6 x 10⁻⁵

Answer is:

6 x 10⁻⁴

Explanation:

[H⁺] = Cα

260) A beaker contains 1 L of 0.1M acetic acid solution. To neutralize the acid partially, 1 gm of NaOH has been added. If the pK_a of acetic acid is 4.75, then the pH of the partially neutralized acetic acid solution will be:

5.22

4.75

4.28

3.05

Answer is:

4.28

261) Mass of H₂C₂O₄ required to reduce 100 mL of 0.008M KMnO₄ in acidix medium is x gm and to neutralize 100 mL of 0.01M Mg(OH)₂ is y gm, then the relation between x and y is:

x = y

x = 2y

2x = y

x = 3y

Answer is:

x = y

262) The pH of 0.1M solution of the following, increases in the order:

NaCl < NH₄Cl < NaCN < HCl

HCl < NH₄Cl < NaCl < NaCN

NaCN < NH₄Cl < NaCl < HCl

HCl < NaCl < NaCN < NH₄Cl

Answer is:

HCl < NH₄Cl < NaCl < NaCN

Physical Chemistry MCQ with Answers

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258) The pH at the equivalence point of a titration may differ from 7 because of:

Hydrolysis of the salt formed

Physical Chemistry MCQ with Answers

Related Physical Chemistry MCQ with Answers

259) The hydrogen ion concentration of 0.06M benzoic acid solution will be: (Ka = 6 x 10−3)

6 x 10−4

260) A beaker contains 1 L of 0.1M acetic acid solution. To neutralize the acid partially, 1 gm of NaOH has been added. If the pKa of acetic acid is 4.75, then the pH of the partially neutralized acetic acid solution will be:

4.28

261) Mass of H2C2O4 required to reduce 100 mL of 0.008M KMnO4 in acidix medium is x gm and to neutralize 100 mL of 0.01M Mg(OH)2 is y gm, then the relation between x and y is:

x = y

262) The pH of 0.1M solution of the following, increases in the order:

HCl < NH4Cl < NaCl < NaCN

Physical Chemistry MCQ with Answers

259) The hydrogen ion concentration of 0.06M benzoic acid solution will be: (K_a = 6 x 10⁻³)

6 x 10⁻⁴

260) A beaker contains 1 L of 0.1M acetic acid solution. To neutralize the acid partially, 1 gm of NaOH has been added. If the pK_a of acetic acid is 4.75, then the pH of the partially neutralized acetic acid solution will be:

261) Mass of H₂C₂O₄ required to reduce 100 mL of 0.008M KMnO₄ in acidix medium is x gm and to neutralize 100 mL of 0.01M Mg(OH)₂ is y gm, then the relation between x and y is:

HCl < NH₄Cl < NaCl < NaCN