Match List I (Disinfectant byproducts (DBPs) of Chlorine) with List II (Chemical Composition).

List I

i.Dibromochloromethane

ii.Bromoform

iii.Bromodichloromethane

iv.Chloro form

List II

a.CHBr2Cl

b.CHCl3

c.CHBrCl2

d.CHBr3

Ai-d, ii-c, iii-a, iv-b ✓ Correct

Bi-d, ii-c, iii-b, iv-a

Ci-c, ii-d, iii-a, iv-b

Di-c, ii-a, iii-d, iv-b

Correct answer: (A) i-d, ii-c, iii-a, iv-b

Explanation

Correct matching links dibromochloromethane with CHBr2Cl, bromoform with CHBr3, bromodichloromethane with CHBrCl2, and chloroform with CHCl3.

Dibromochloromethane carries two bromine and one chlorine atom, giving CHBr2Cl.

Bromoform holds three bromine atoms, giving CHBr3.

Bromodichloromethane has one bromine and two chlorine atoms, giving CHBrCl2.

Chloroform holds three chlorine atoms, giving CHCl3.

These trihalomethanes form when chlorine used to disinfect water reacts with organic matter.

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