Titration MCQs

Titration, also known as volumetric analysis, is a laboratory technique used to ascertain the concentration of an unknown solution. It is a quantitative chemical analysis method where a titrant with a known concentration is prepared and used to react with the analyte in order to determine its concentration. The volume of titrant required to react with the analyte is referred to as the titre volume. Titration can involve various types of reactions, with acid-base titrations and redox titrations being the most common. An indicator is employed to signal the endpoint of the reaction, typically through a color change.

Which of the following is used as an indicator in the titration of iodine with hypo?

(a) Methyl red
(b) Methyl orange
(c) Starch
(d) Potassium ferricyanide

The amount of NaOH used in the titration of 100 ml 0.1 N HCl is

(a) 4 g
(b) 0.04 g
(c) 2 g
(d) 0.4 g

The pH range of methyl orange as an indicator is

(a) 3-5
(b) 8-9
(c) 2-4
(d) 6-8

What will be the pH at the equivalence point in the titration of a weak acid and a strong base?

(a) 0
(b) >7
(c) 7
(d) <7

Which of the following represents the equivalence point in the graph of pH Vs volume of titrant?

(a) Point at the highest pH
(b) Point at the greatest magnitude of the slope of the curve
(c) Point at the lowest pH
(d) Point at the least magnitude of the slope of the curve

The normal rain water is acidic due to

(a) SO₂
(b) NO₂
(c) NH₃
(d) CO₂

The equivalent weight of an acid can be calculated by

(a) Molecular weight × basicity
(b) Molecular weight/basicity
(c) Molecular weight × acidity
(d) Molecular weight/acidity

The buffer region is represented by

(a) the concave curve after adding titrant
(b) the flat curve before the equivalence point
(c) the flat curve after the equivalence point
(d) the steep curve after the equivalence point

On adding a large amount of titrant, an asymptote is obtained in the titration curve, this asymptote represents

(a) Ka of the initial solution
(b) pH of the initial solution
(c) pH of the titrant
(d) none of the above

How many mmols of NaOH will be used in the titration with 33ml of 3 M HCl to form NaCl and water?

(a) 10 mmol
(b) 100 mmol
(c) 3 mmol
(d) 33 mmol