Organic Chemistry
Practice questions on named reactions, condensations, oxidations, and organic chemistry tests for engineering entrance exams
Questions
Urotropine can be obtained by which of the following reactions?
- Reaction between formaldehyde and ammonia
- Reaction between phenol and formaldehyde
- Reaction between vinyl acetylene and hydrochloric acid
- Reaction between benzaldehyde and triphenylphosphine alkylindenes
- Reaction between acetylene and chlorine
Which of the following compounds is formed by the action of acetone with bleaching powder?
- Ethane
- Chloroform
- Ethyl alcohol
- Nitroethane
- Ethenamide
Which of the following are the constituents of green oil?
- Anthracene and phenanthrene
- Benzene and toluene
- Phenol and naphthalene
- Cersols and naphthalene
- Both (2) and (3)
What are the products formed when 2-methyl but-2-ene is oxidised in the presence of periodic or lead tetra-acetate?
- Acetone and acetaldeyde
- Acetaldehyde and formaldehyde
- Acetic acid and formic acid
- Acetone and acetic acid
- Benzaldehyde and ethyl acetate
When 2 molecules of acetophenone are condensed in the presence of aluminium ter-butoxide, which of the following compounds is formed?
- Acetoacetic ester
- Dypnone
- Pinacol
- Phorone
- Benzalacetophenone
Elbs persulfate reaction synthesises
- benzyl alcohol and soda-benzoate
- catechol
- catechol and quinol
- methylsalicylate
- quinol
When two molecules of acetone condense in the presence of dry HCl gas, which of the following compounds is formed?
- Mesityl oxide
- Phorone
- Mesitylene
- Schiff's base
- Methyl salicylate
Glycerol is oxidised by bismuth nitrate to produce
- meso-oxalic acid
- resorcinol
- phenyl acetate
- salicylic acid
- salicylaldehyde
Which of the following statements is correct about Lucas test?
- Tertiary alcohol produces the turbidity immediately.
- Alkyl iodide reacts with silver nitrite to form the corresponding nitroalkane.
- Primary alcohol gives turbidity within 5 to 10 minutes.
- Carbonyl gets reduced into alcohol by using alcoholic sodium.
- Iodoform decomposes to free iodine when in contact with organic matter.
Phenol reacts with bromine in carbon disulphide at low temperature. Which of the following is/are the major product(s) obtained?
- Ortho-bromophenol
- 2,4,6 tribromophenol
- Para-bromophenol
- Both (1) and (2)
- Hydroquinone
'Oil of wintergreen' is obtained when
- salicylic acid is treated in the presence of conc. H2SO4/CH3OH
- salicylic acid reacts in the presence of C6H5OH/POCl3
- salicylic acid is catalysed by (CH3CO)2CO
- Both (2) and (3)
- phenol is condensed with benzene diazonium chloride
Mesitylene is formed when
- 2 molecules of acetylene react with sulphur
- 3 molecules of acetylene are catalysed by red hot tube
- 4 molecules of acetylene are catalysed by nickel cyanide under pressure
- 3 molecules of propyne are passed through red hot tube
- 2 molecules of acetophenone are catalysed in the presence of aluminium tetraoxide