Organic Chemistry

Practice questions on named reactions, condensations, oxidations, and organic chemistry tests for engineering entrance exams

12 Questions Published

Questions

Question 1 Multiple Choice (Single Answer)

Urotropine can be obtained by which of the following reactions?

  1. Reaction between formaldehyde and ammonia
  2. Reaction between phenol and formaldehyde
  3. Reaction between vinyl acetylene and hydrochloric acid
  4. Reaction between benzaldehyde and triphenylphosphine alkylindenes
  5. Reaction between acetylene and chlorine
Question 2 Multiple Choice (Single Answer)

Which of the following compounds is formed by the action of acetone with bleaching powder?

  1. Ethane
  2. Chloroform
  3. Ethyl alcohol
  4. Nitroethane
  5. Ethenamide
Question 3 Multiple Choice (Single Answer)

Which of the following are the constituents of green oil?

  1. Anthracene and phenanthrene
  2. Benzene and toluene
  3. Phenol and naphthalene
  4. Cersols and naphthalene
  5. Both (2) and (3)
Question 4 Multiple Choice (Single Answer)

What are the products formed when 2-methyl but-2-ene is oxidised in the presence of periodic or lead tetra-acetate?

  1. Acetone and acetaldeyde
  2. Acetaldehyde and formaldehyde
  3. Acetic acid and formic acid
  4. Acetone and acetic acid
  5. Benzaldehyde and ethyl acetate
Question 5 Multiple Choice (Single Answer)

When 2 molecules of acetophenone are condensed in the presence of aluminium ter-butoxide, which of the following compounds is formed?

  1. Acetoacetic ester
  2. Dypnone
  3. Pinacol
  4. Phorone
  5. Benzalacetophenone
Question 6 Multiple Choice (Single Answer)

Elbs persulfate reaction synthesises

  1. benzyl alcohol and soda-benzoate
  2. catechol
  3. catechol and quinol
  4. methylsalicylate
  5. quinol
Question 7 Multiple Choice (Single Answer)

When two molecules of acetone condense in the presence of dry HCl gas, which of the following compounds is formed?

  1. Mesityl oxide
  2. Phorone
  3. Mesitylene
  4. Schiff's base
  5. Methyl salicylate
Question 8 Multiple Choice (Single Answer)

Glycerol is oxidised by bismuth nitrate to produce

  1. meso-oxalic acid
  2. resorcinol
  3. phenyl acetate
  4. salicylic acid
  5. salicylaldehyde
Question 9 Multiple Choice (Single Answer)

Which of the following statements is correct about Lucas test?

  1. Tertiary alcohol produces the turbidity immediately.
  2. Alkyl iodide reacts with silver nitrite to form the corresponding nitroalkane.
  3. Primary alcohol gives turbidity within 5 to 10 minutes.
  4. Carbonyl gets reduced into alcohol by using alcoholic sodium.
  5. Iodoform decomposes to free iodine when in contact with organic matter.
Question 10 Multiple Choice (Single Answer)

Phenol reacts with bromine in carbon disulphide at low temperature. Which of the following is/are the major product(s) obtained?

  1. Ortho-bromophenol
  2. 2,4,6 tribromophenol
  3. Para-bromophenol
  4. Both (1) and (2)
  5. Hydroquinone
Question 11 Multiple Choice (Single Answer)

'Oil of wintergreen' is obtained when

  1. salicylic acid is treated in the presence of conc. H2SO4/CH3OH
  2. salicylic acid reacts in the presence of C6H5OH/POCl3
  3. salicylic acid is catalysed by (CH3CO)2CO
  4. Both (2) and (3)
  5. phenol is condensed with benzene diazonium chloride
Question 12 Multiple Choice (Single Answer)

Mesitylene is formed when

  1. 2 molecules of acetylene react with sulphur
  2. 3 molecules of acetylene are catalysed by red hot tube
  3. 4 molecules of acetylene are catalysed by nickel cyanide under pressure
  4. 3 molecules of propyne are passed through red hot tube
  5. 2 molecules of acetophenone are catalysed in the presence of aluminium tetraoxide