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CBSE 12th Standard Chemistry Subject Chemistry in Everyday Life Ncert Exemplar 2 Mark Questions 2021

Published on: 25/05/2021

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Download CBSE Class 12th Standard CBSE Chemistry question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 12th Standard CBSE Chemistry

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Std: 12th Standard CBSE - Chemistry

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Questions:

Generic 2

4 x 2 = 8

If soap has high alkali content it irritates skin. How can the amount of excess alkali be determined? What can be the source of excess alkali?

What are antagonistic drugs?

How does the branching of hydrocarbon chain of synthetic detergents affect their biodegradability?

Hair shampoos belong to which class of synthetic detergent ?

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Answers Key:

Generic 2

4 x 2 = 8

Acid-Base titration can be used to determine the excess amount of alkali in the soap. The excess alkali left after hydrolysis of oil can be source of alkalinity in soap.

Drugs that bind to the receptor site and inhibit its natural function are called antagonists.

Smaller the branching, larger the biodegradability of a detergent, i.e. detergents with long straight chains of hydrocarbon are more easily degraded than those
having branched hydrocarbon chains.

Cation detergents (like cetyltrimethyl ammonium bromide) are used as hair conditioners in hair shampoos.