Which of the following indicators is suitable for a titration between a strong acid and a weak base?
a) Methyl orange
b) Phenolphthalein
c) Bromothymol blue
d) Litmus
Answer: a
What is the pH of a 0.1 M NaOH solution?
a) 1
b) 7
c) 13
d) 14
Answer: c
Which of the following is a polyprotic acid?
a) Hydrochloric acid
b) Sulfuric acid
c) Nitric acid
d) Hydrofluoric acid
Answer: b
Which of the following will form an acidic solution when dissolved in water?
a) NaCl
b) KNO₃
c) NH4ClNH_4ClNH4Cl
d) Na₂CO₃
Answer: c
The ionization of a weak acid is suppressed by the addition of:
a) A strong acid
b) A strong base
c) A salt of the weak acid
d) Water
Answer: c
In a titration curve for the titration of a strong acid with a strong base, the equivalence point is at pH:
a) 1
b) 7
c) 9
d) 14
Answer: b
Which of the following is not a characteristic of a buffer solution?
a) It resists changes in pH when small amounts of acid or base are added
b) It has a pH equal to 7
c) It contains a weak acid and its conjugate base
d) It can maintain a nearly constant pH
Answer: b
What is the role of water in the ionization of acids?
a) It acts as a solvent
b) It donates protons
c) It accepts protons
d) It acts as an acid
Answer: c
Which of the following salts is basic in nature?
a) NaCl
b) Na2CO3Na_2CO_3Na2CO3
c) KNO3KNO_3KNO3
d) NH4ClNH_4ClNH4Cl
Answer: b
Which of the following is a property of a strong acid?
a) It has a high KaK_aKa value
b) It has a low KaK_aKa value
c) It partially ionizes in water
d) It forms a weak electrolyte in water
Answer: a