JEE & NEETJEE Chemistry 100+ MCQ & Answer JEE Main Chemistry | page-02 | General Knowledge MCQ And Answer February 1, 2025 DSN MARATHI 11. Which of the following is true regarding polyhydric alcohols? A. It should have more than four OH groups B. It should have three or more OH groups C. It should have two or more OH groups D. It should have one or more OH groups Answer Option : C 12. Benzene diazonium chloride on reaction with phenol in weakly basic medium gives ______. A. Benzene B. Chlorobenzene C. p-Hydroxyazobenzene D. Diphenyl ether Answer Option : C 13. Dehydration of alcohol is an example of ______. A. Addition reaction B. Elimination reaction C. Substitution reaction D. Redox reaction Answer Option : B 14. What is the general formula for an aliphatic alcohol? (R=alkyl group) A. R-H B. R-OH C. R-CHO D. R-COOH Answer Option : B 15. Phenol on reduction with H2 in the presence of Ni catalyst gives _______. A. Benzene B. Toluene C. Cyclohexane D. Cyclohexanol Answer Option : D 16. Which of the following compounds contain an aryl carbon? A. Ethanol B. Phenol C. Benzyl alcohol D. Vinyl alcohol Answer Option : B 17. Phenol reacts with bromine in CS2 at low temperature to give ______. A. m-bromophenol B. p-bromophenol C. 2,4,6-tribromophenol D. o- and p-bromophenol Answer Option : D 18. Which of the following reactions is common in alkenes? A. Addition B. Elimination C. Substitution D. Superposition Answer Option : A 19. Cis-trans isomerism in alkenes is due to _______. A. chiral carbon B. free rotation about single bond C. free rotation about the double bond D. restricted rotation about the double bond Answer Option : D 20. Which among the following is not colourless? A. Butene B. Ethene C. Methene D. Propene Answer Option : B
11. Which of the following is true regarding polyhydric alcohols? A. It should have more than four OH groups B. It should have three or more OH groups C. It should have two or more OH groups D. It should have one or more OH groups Answer Option : C
12. Benzene diazonium chloride on reaction with phenol in weakly basic medium gives ______. A. Benzene B. Chlorobenzene C. p-Hydroxyazobenzene D. Diphenyl ether Answer Option : C
13. Dehydration of alcohol is an example of ______. A. Addition reaction B. Elimination reaction C. Substitution reaction D. Redox reaction Answer Option : B
14. What is the general formula for an aliphatic alcohol? (R=alkyl group) A. R-H B. R-OH C. R-CHO D. R-COOH Answer Option : B
15. Phenol on reduction with H2 in the presence of Ni catalyst gives _______. A. Benzene B. Toluene C. Cyclohexane D. Cyclohexanol Answer Option : D
16. Which of the following compounds contain an aryl carbon? A. Ethanol B. Phenol C. Benzyl alcohol D. Vinyl alcohol Answer Option : B
17. Phenol reacts with bromine in CS2 at low temperature to give ______. A. m-bromophenol B. p-bromophenol C. 2,4,6-tribromophenol D. o- and p-bromophenol Answer Option : D
18. Which of the following reactions is common in alkenes? A. Addition B. Elimination C. Substitution D. Superposition Answer Option : A
19. Cis-trans isomerism in alkenes is due to _______. A. chiral carbon B. free rotation about single bond C. free rotation about the double bond D. restricted rotation about the double bond Answer Option : D
20. Which among the following is not colourless? A. Butene B. Ethene C. Methene D. Propene Answer Option : B
