Subject

Chemistry

Class

JEE Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

41.

CH3COOH when reacts with C,HOH gives a product. The same product is obtained by which reaction?

  • Acetic acid + methanol

  • Acetic anhydride + water

  • Acetic anhydride + ethanol

  • Acetamide + methanol


42.

Which of the following amines gives yellow oily liquid with HNO3

  • Ethyl methyl amine

  • Aniline

  • 3-methyl benzyl amine

  • Methyl amine


43.

N-ethyl-N-methylpropan-1-amine is

  • 1° amine

  • 2° amine

  • 3° amine

  • 4° amine


44.

The correct order of dehydration of alcohols is

  • 1° > 2° > 3°

  • 3° > 2° > 1°

  • 2° > 1° > 3°

  • 1° > 3° > 2°


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45.

Ethanolic KOH gives

  • dehalogenation reactions

  • dehydrogenation reactions

  • dehydrohalogenation reactions

  • substitution reactions


46.

Which of the following is a trisaccharide ?

  • Stachyrose

  • Sucrose

  • Raffinose

  • Ribose


47.

Glucose on reaction with Fehling solution gives

  • cupric oxide

  • cuprous oxide

  • saccharic acid

  • both (b) and (c)


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48.

α- hydroxy propanoic acid has ........ asymmetric carbon atoms. 

  • 4

  • 3

  • 2

  • 1


D.

1

Asymmetric carbon atom is the carbon, four valencies of which are satisfied by four different groups. The structure of a-hydroxy propanoic acid is

CH3CH*|OH - COOH

(C* = aymmetric carbon atom)

Thus, α-hydroxy propanoic acid has one asymmetic carbon atom.


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49.

In Clemmensen's reduction, the catalyst used is 

  • Zn- Hg + Conc HCl

  • NH2NH2 + C2H5ONa

  • PdCl2 /H2O

  • (C6H5)3P + C2H5ONa


50.

The common names of the lower fatty acids are obtained from

  • their parent hydrocarbon

  • their reduction product

  • the sources from which they are obtained

  • IUPAC system


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