Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

31.

Common alum is

  • K2SO4.Al2(SO4)3.24H2O

  • (NH4)2SO4.FeSO4.6H2O

  • K2SO4.Cr2(SO4)3.24H2O

  • K2SO4.Fe2(SO4)3.24H2O


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32.

The general molecular formula for disaccharide is

  • C12H22O11

  • C10H20O10

  • C12H20O10

  • C12H22O10


A.

C12H22O11

Disaccharides are the carbohydrates which on hydrolysis gives two same or different monosaccharides. Their general formula is C12H22O11. eg,

C12H22O11 + H2H+ C6H12O6 + C6H12O6

 sucrose                        glucose      fructose


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33.

Which one of the following proteins transports oxygen in the blood stream?

  • Myoglobin

  • Insulin

  • Albumin

  • Haemoglobin


34.

Ethyl alcohol reacts with thionyl chloride to give

  • CH3CH2Cl + HCl

  • CH3CH2Cl + H2O + SO2

  • CH3CH2Cl +HCl + SO2

  • CH3CH2Cl +SO2 + Cl2


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35.

Gabriel phthalimide reaction is used for the preparation of

  • primary aromatic amines

  • secondary amines

  • primary aliphatic amines

  • tertiary amines


36.

The monomers of terylene are

  • phenol and formaldehyde

  • ethylene glycol and phthalic acid

  • adipic acid and hexamethylenediamine

  • ethylene glycol and terephthalic acid


37.

Primary alcohols can be obtained from the reaction of R Mg X with

  • CO2

  • HCHO

  • CH3CHO

  • H2O


38.

Proteins are composed of

  • α- amino acids

  • carbohydrates

  • vitamins

  • mineral salts


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39.

Heating of rubber with sulphur is called

  • vulcanisation

  • galvanisation

  • sulphonation

  • bessemerisation


40.

Which of the following statement is correct ?

  • +I group stabilises a carbocation

  • +I group stabilises a carbanion

  • -I group stabilises a carbocation

  • -I group stabilises a free radical


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