General Science MCQ – 131 (Chemistry)

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1. Benzenediazonium chloride on reaction with phenol in weakly basic medium gives?
(A) Diphenyl ether
(B) p-hydroxyazobenzene
(C) Chlorobenzene
(D) Benzene

2. Phenol reacts with bromine in CS₂ at low temperature to give?
(A) m-bromophenol
(B) o-and p- bromophenol
(C) p- bromophenol
(D) 2,4,6-tribromophenol

3. When phenol is treated with excess bromine water it gives?
(A) m-bromophenol
(B) o-and p- bromophenol
(C) p- bromophenol
(D) 2,4,6-tribromophenol

4. Phenol on reduction with H₂ in the presence of Ni catalyst gives?
(A) Benzene
(B) Toluene
(C) Cyclohexane
(D) Cyclohexanol

5. Dehydration of alcohol is an example of?
(A) Addition reaction
(B) Elimination reaction
(C) Substitution reaction
(D) Redox reaction

6. The compound obtained by the reaction of ethane with diborane followed by hydrolysis with alkaline H₂O₂ is?
(A) Ethanol
(B) Propanol
(C) Ethanal
(D) Triethyl bromide

7. Which of the following is formed when phenol is exposed to air?
(A) o-Benzoquinone
(B) p- Benzoquinone
(C) Phenoquinone
(D) o-and p- Benzoquinone

8. Which of the following is formed when glycerol is heated with oxalic acid at 503K?
(A) Glycerin acid
(B) Acrolein
(C) Allyl alcohol
(D) Methanoic acid

9. The alcohol which does not react with Lucas regent is?
(A) isobutyl alcohol
(B) n-butanol
(C) tert-butyl alcohol
(D) sec-butyl alcohol

10. Phenol is less acidic than?
(A) acetic acid
(B) p-methozyphenol
(C) Nitrophenol
(D) Ethanol

General Science MCQ – 130 (Biology)