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Free download in PDF Organic Chemistry Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like UPSC, NDA, SSC etc. These short solved questions or quizzes are provided by Gkseries./p>
(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
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
Answer: Phenol, chloroform and sodium hydroxide
(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
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
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
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
(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
(8)
Picric acid is formed when phenol react with which of the following reactant?
[A]
Formaldehyde
[B]
Hydrogen
[C]
Nitric acid
[D]
Hydrochloric acid
(9)
Bakelite is formed when phenol react with which of the following reactant?
[A]
Formaldehyde
[B]
Hydrogen
[C]
Nitric acid
[D]
Sulphuric acid
(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
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