Ncert Exercises & Solutions

Match the detergents given in Column I with their uses in Column II.

Column I	Column II
A. $[{CH}_{3}]$ $\|$ ${CH}_{3} {({CH}_{2})}_{15} - N - {CH}_{3}$ $\|$ ${CH}_{3} + {Br}^{-}$	1. Dishwashing powder
B.	2. Laundry soap
C. $C_{17} H_{35} {COO}^{-} {Na}^{+} + {Na}_{2} {CO}_{3} + Rosin$	3. Hair conditioners
D. ${CH}_{3} {({CH}_{2})}_{16} COO {({CH}_{2} {CH}_{2} O)}_{n} {CH}_{2} {CH}_{3} OH$	4. Toothpaste

Codes

Options:	A	B	C	D
1.	2	3	4	1
2.	3	4	2	1
3.	2	4	3	1
4.	4	3	2	1

Hint: Detergent is an emulsifying agent that is scientifically referred to as sodium dodecyl benzene sulphonate.

A. Hair shampoos /conditioners are made up of cationic detergents. These are quarternary ammonia salts of amines with chlorides, bromides, or accents, e.g. cetyltrimethylammonium bromide.

B. Anionic detergents are used in toothpaste e.g., sodium dodecyl benzoic sulphonate. It can be prepared as follows

C. Laundry soaps contain fillers like sodium resinate. Sodium silicate, borax, and sodium carbonate. Sodium resinate makes the soap lather well.

D Dishwashing powder are non-ionic detergents

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