Organic Chemistry Multiple Choice Questions and Answers

Questions

1 Phenolphthalein is obtained by heating phenol with conc. H₂SO₄ and which of the following reactant?

A Benzyl alcohol

B Benzene

C Benzoic acid

D Phthalic anhydride

View Answer

Answer: Phthalic anhydride

2 Salicylaldehyde can be prepared from which of the following reactants?

A Phenol and chloroform

B Phenol, chloroform and sodium hydroxide

C Phenol, carbon tetrachloride and NaOH

D Phenol, carbon tetrachloride

View Answer

Answer: Phenol, chloroform and sodium hydroxide

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3 When phenol is treated with excess of bromine water, it gives which of the following product?

A m-bromophenol

B o-and p-bromophenol

C 2,4-dibromophenol

D 2,4,6-tribromophenol

View Answer

Answer: 2,4,6-tribromophenol

4 Phenol reacts with bromine in carbon disulphate at low temperature to give which of the following product?

A m-bromophenol

B o-and p-bromophenol

C p-bromophenol

D 2,4,6-tribromophenol

View Answer

Answer: o-and p-bromophenol

5 Bromine reacts with phenol and decolorize orange color and turns it to which of the colored precipitate?

A white precipitate

B pink precipitate

C blue precipitate

D black precipitate

View Answer

Answer: white precipitate

6 Which of the following regents may be used to distinguish between phenol and benzoic acid?

A Aqueous NaOH

B Tollen’s reagent

C Molisch reagent

D Neutral FeCl₃

View Answer

Answer:Neutral FeCl₃

7 What is the major product obtained on interaction of phenol with sodium hydroxide and carbon dioxide?

A Benzoic acid

B Salicyladehyde

C Salicylic acid

D Phthalic acid

View Answer

Answer: Salicylic acid

8 Picric acid is formed when phenol react with which of the following reactant?

A Formaldehyde

B Hydrogen

C Nitric acid

D Hydrochloric acid

View Answer

Answer: Nitric acid

9 Bakelite is formed when phenol react with which of the following reactant?

A Formaldehyde

B Hydrogen

C Nitric acid

D Sulphuric acid

View Answer

Answer: Formaldehyde

10 Phenol undergoes ionization to become more stable by reacting with which of the following chemical species?

A negative ions

B positive ions

C radicals

D neutral atoms

View Answer

Answer: negative ions

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