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Chemical Properties of Hydroxy compounds MCQ Advance level

Dear Readers,

Compared to other sections, Chemistry is considered to be the most scoring section. If prepared thoroughly, chemistry can help students to secure a meritorious position in the exam. These questions are very important in achieving your success in Exams after 12th.

Q1. Read the following statements carefully (1) A secondary alcohol on oxidation gives a ketone (2) Ethanol reacts with conc. H2SO4 at 180oC to yield ethylene (3) Methanol reacts with iodine and sodium hydroxide to give a yellow precipitate of iodoform (4) Hydrogen gas is liberated when sodium is added to alcohol Select the correct statements from the above set

  •  1, 2
  •  3, 4
  •  1, 2, 4
  •  1, 3, 4

1, 2, 4

Q2. Rectified spirit obtained by fermentation contains 4.5% of water. So in order to remove it, rectified spirit is mixed with suitable quantity of benzene and heated. Benzene helps because

  •  Primary >It is dehydrating agent and so removes water
  •  Secondary >It forms the lower layer which retains all the water so that alcohol can be distilled off
  •  Tertiary >It forms an azeotropic mixture having high boiling point and thus allows the alcohol to distill over
  •  It forms low boiling azeotropic mixtures which distill over, leaving behind pure alcohol which can then be distilled

It forms low boiling azeotropic mixtures which distill over, leaving behind pure alcohol which can then be distilled

Q3. Assertion : A triester of glycerol and palmitic acid on boiling with aqueous NaOH gives a solid cake having soapy touch Reason : Free glycerol is liberated which is a greasy solid

  •  Both assertion and reason are true statements and reason is the correct explanation of assertion
  •  Both assertion and reason are true statements and reason is not the correct explanation of assertion
  •  Assertion is true but reason is a false statement
  •  Both assertion and reason are false statements

Assertion is true but reason is a false statement

Q4. Which of the following would undergo dehydration most readily

  •  1-phenyl-1 butanol
  •  2-phenyl-2-butanol
  •  1-phenyl-2-butanol
  •  2-phenyl-1-butanol

1-phenyl-2-butanol

Q5. Which of the following is not true in case of reaction with heated copper at 300oC

  •  Phenol → Benzyl alcohol
  •  Primary alcohol → Aldehyde
  •  Secondary alcohol → Ketone
  •  Tertiary alcohol → Olefin

Phenol → Benzyl alcohol

Q6.  A mixture of methanol vapours and air is passed over heated copper. The products are

  •  Carbon monoxide and hydrogen
  •  Formaldehyde and water vapour
  •  Formic acid and water vapour
  •   Carbon monoxide and water vapour

Formaldehyde and water vapour

Q7. Which is more reactive with HBr

  •  2-methyl propane-2-ol
  •  Propane-1-ol
  •  Propane-2-ol
  •  2-methyl propane-1-ol

2-methyl propane-2-ol

Q8.  Propene is the product obtained by dehydration of

  •  2-propanol
  •  1-propanol
  •  Propanal
  •  n-propyl alcohol

2-propanol

Q9. Isopropyl alcohol on oxidation forms

  •  Acetone
  •  Ether
  •  Ethylene
  •  Acetaldehyde

Acetone

Q10. The acid strengths of ethanol, isopropanol and tert. butanol decrease in the order

  •  Ethanol >isopropanol>tert. butanol
  •  Tert. butanol >isopropanol>Ethanol
  •  Isopropanol>tert. butanol> Ethanol
  •  Tert. butanol > Ethanol >isopropanol

Ethanol >isopropanol>tert. butanol



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