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JEE Advanced > Chemistry in Everyday Life

Explore popular questions from Chemistry in Everyday Life for JEE Advanced. This collection covers Chemistry in Everyday Life previous year JEE Advanced questions hand picked by experienced teachers.

Q 1.

Correct3

Incorrect-1

Soaps and synthetic detergents are used as cleansing agents. Soaps are the sodium or potasssium salts of long chain fatty acids, eg, stearic acid, oleic acid and palmitic acid. Detergents are the soapless soap. These are mainly classified into three categories (i) anionic detergents (ii) catergents (iii) non ionic detergents Anionic detergents are sodium salts of sulphonated long chain alcohols or hydrocarbons. Cationic detergents are quaternary ammonium salts of amines with acetates chlorides as anions. Non ionic detergent is formed when stearic acid reacts with polyethylene glycol. Soaps are biodegradable while detergents having highly branched hydrocarbon chain are non biodergradable. These persist in water even after sewage treatment and cause foaming in rivers, ponds, steams and their water gets polluted. Therefore, to prevent water pollution branching of the hydrocarbon chain is controlled and kept to minimum
Detergents are prepared by the action of {tex} \mathrm { H } _ { 2 } \mathrm { SO } _ { 4 } {/tex} followed by neutralisation by starting with

A

Cholesterol

B

Cyclohexanol

Lauryl alcohol

D

{tex} p {/tex} -nitrophenol

Explanation


Q 2.

Correct3

Incorrect-1

Chemicals are added to food for their preservation, enhancing their appeal and adding nutritive value in them.Important food additives are food colours, flavours and sweeteners, fat emulsifiers and stabilising agents, antioxidants, preservatives and nutritional supplements such as vitamins, minerals etc
Sucralose, an aritificial sweetener is

A

Monochloro derivative of sucrose

B

Dichloro derivative of sucrose

Trichloro derivative of sucrose

D

None of the above

Explanation