Chlorine Gas MCQs

Chlorine gas (Cl₂) is yellow-green in color and is a highly reactive and strong oxidizing agent. It belongs to the 17th group in the periodic table, known as the halogens, which includes elements like fluorine (F), bromine (Br), and iodine (I). In nature, chlorine is mostly found as ionic chloride, such as in sodium chloride (table salt). Chlorine gas is utilized as a bleaching agent in the paper and cloth manufacturing industries and as a disinfectant to eliminate harmful bacteria in swimming pools and drinking water.

Which of the following will most readily form an anion?

(a) Alkali metals
(b) Halogens
(c) Nitrogen family
(d) Oxygen family

(b) Halogens

Who suggested the name chlorine for the first time?

(a) Davy
(b) Scheele
(c) Priestley
(d) Rutherford

(a) Davy

Calcium chlorite has the molecular formula

(a) Ca(ClO4)2
(b) Ca(ClO3)2
(c) CaClO2
(d) Ca(ClO2)2

(d) Ca(ClO2)2

Deacon’s process is used to manufacture

(a) nitric acid
(b) sulphuric acid
(c) chlorine
(d) bleaching powder

(c) chlorine

Which of the following is produced on the reaction of bleaching powder with a few drops of conc. HCl?

(a) Hypochlorous acid
(b) Oxygen
(c) Chlorine
(d) Calcium oxide

(c) Chlorine

Which among the following is the strongest oxidising agent?

(a) F2
(b) I2
(c) Br2
(d) Cl2

(a) F2

Chlorine gas reacts with _ to form bleaching powder.

(a) dry slaked lime
(b) dil. solution of Ca(OH)2
(c) conc. solution of Ca(OH)2
(d) dry CaO

(a) dry slaked lime

Chlorine reacts with cold and dil. Alkali to form

(a) chloride
(b) hypochlorite
(c) chlorate
(d) both (a) and (b)

(d) both (a) and (b)

Chlorine is used as a bleaching agent. The bleaching action is due to

(a) oxidation
(b) chlorination
(c) hydrogenation
(d) reduction

(a) oxidation

Four lone pairs of electrons are present in

(a) O
(b) He
(c) Cl–
(d) HI

(c) Cl–