Fear or excitement, generally causes one to breathe rapidly and it results in the decrease of CO<sub>2</sub> concentration in blood. In what way will it change the pH of blood?

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Physical Chemistry
257

Physical Chemistry MCQ with Answers

257) Fear or excitement, generally causes one to breathe rapidly and it results in the decrease of CO₂ concentration in blood. In what way will it change the pH of blood?

pH will increase

pH will decrease

No change

pH will adjust to 8

Answer is:

No change

Explanation:

Blood itself is a buffer solution, so a small change in CO₂ concentration will not affect its pH.

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:

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.

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

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257) Fear or excitement, generally causes one to breathe rapidly and it results in the decrease of CO2 concentration in blood. In what way will it change the pH of blood?

No change

Physical Chemistry MCQ with Answers

Related Physical Chemistry MCQ with Answers

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

Hydrolysis of the salt formed

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

Physical Chemistry MCQ with Answers

257) Fear or excitement, generally causes one to breathe rapidly and it results in the decrease of CO₂ concentration in blood. In what way will it change the pH of blood?

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: