MCQs on Acid-Base Titration

MCQs on Acid-Base Titration

1. What is the molarity of the solution of barium hydroxide, if 35 ml of 0.1 M HCl is used in the titration of 25 ml of the barium hydroxide solution?

(a) 0.35

(b) 0.07

(c) 0.28

(d) 0.14

Answer: (b)

2. Which of the following titrations will have the equivalence point at a pH more than 8?

(a) HCl and NH₃

(b) CH₃COOH and NH₃

(c) HCl and NaOH

(d) CH₃COOH and NaOH

Answer: (d)

3. Which of the following is used as an indicator in the titration of a strong acid and a weak base?

(a) Phenolphthalein

(b) Thymol blue

(c) Fluorescein

(d) Methyl orange

Answer: (d)

4. Which of the following is used as an indicator in the titration of a weak acid and a strong base?

(a) Bromothymol blue (6 to 7.5)

(b) Methyl orange (3 to 4)

(c) Methyl red (5 to 6)

(d) Phenolphthalein (8 to 9.6)

Answer: (d)

5. The ideal indicator for the titration of strong acid and weak base should have pH range between

(a) 5-8

(b) 4-6

(c) 8-10

(d) 7-8

Answer: (b)

6. A difference between strong and weak acid is

(a) presence and absence of halogen ions

(b) negative and positive pH

(c) complete and partial ionisation

(d) proton donation and electron acceptance

Answer: (c)

7. Find the concentration of HCl, if 10 ml of 0.5 M Ca(OH)₂ is required to titrate 50 ml of HCl.

(a) 5 M

(b) 1/10 M

(c) 10 M

(d) 1/5 M

Answer: (d)

8. Which of the following is a buffer solution?

(a) H₂SO₄ + CuSO₄

(b) CH₃COOH + CH3COONH₄

(c) NaCl + NaOH

(d) CH₃COONa + CH₃COOH

Answer: (d)

9. If 30 ml of acid is neutralised by 15 ml of 0.2 N alkali, then the concentration of acid is

(a) 0.4 N

(b) 0.1 N

(c) 0.3 N

(d) 0.15 N

Answer: (b)

10. What is the concentration of the sulphuric acid solution, if 100 ml of the solution is neutralised by 50 ml of 0.5 M Ba(OH)₂ solution?

(a) 0.25 M

(b) 50 M

(c) 0.5 M

(d) 100 M

Answer: (a)