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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.

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Chemistry in Everyday Life

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Q 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

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Q 2. 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


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Q 3.

Which of the following is used as a “morning after pill”?

A

Norethindrone

B

Ethynylestradiol

Mifepristone

D

Bithional

Explanation

Mifepristone is used as a “morning after pill”.

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Q 4.

Which one of the following compounds give aspirin on reacting with acetic anhydride in the presence of conc.

A

C

D

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Q 5.

Soaps can be classified as

A

Carbohydrates

B

Ether

Salts of fatty acids

D

None of these

Explanation

Soaps can be classified as salts of fatty acids. Because soaps are formed by the alkaline hydrolysis of oils or fats which produce sodium salt of fatty acids (soaps) and glycerol.

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Q 6.

Compound used as a food preservative

A

Sodium acetate

B

Sodium propionate

Sodium benzoate

D

Sodium oxalate

Explanation

Sodium benzoate is used as a food preservative.

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Q 7.

Which one is basic dye?

A

Orange-I

B

Phenolphthalein

C

Anthraquinone

Aniline yellow

Explanation

Basic dyes contain salts of amino or substituted amino group which in acid solution forms water soluble cations. These dyes attack the anionic sites present on the fabrics and then get attached to them.

Aniline yellow is a basic dye. Its structure is as

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Q 8.

An ester used as medicine is

A

Ethyl acetate

Methyl salicylate

C

Ethyl benzoate

D

Methyl benzoate

Explanation

Methyl salicylate is used as medicine for care of sciatica, rheumatism, lumbago and arthiritis.

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Q 9.

Which type of dyes are not used to dye nylon and polyester fibres?

Vat dyes

B

Basic dyes

C

Disperse dyes

D

Insoluble azo dyes

Explanation

Vat dyes are not used to dye nylon and polyester fibres but used to dye cotton fibres. Basic dyes, disperse dyes and insoluble azo dyes however, are used to dye nylon and polyesters.

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Q 10.

Which of the following compounds is an azo dye?

A

Martius yellow

B

Malachite green

Methyl orange

D

Mercurochrome

Explanation

Methyl orange is an azo dye. It is an acidic dye.