Tiêu đề ALCOHOLS, PHENOLS, ETHERS.pdf ✅

UNIT 8 ALCOHOLS, PHENOLS AND ETHERS Exercise 1: NCERT Based Topic-wise MCQs 8.0 INTRDUCTION 1. In benzyl alcohol, −OH group directly attach to NCERT Page-324/ N-194 (a) sp 3 hybridised carbon (b) sp 2 hybridised carbon (c) sp hybridised carbon (d) None of these 8.1 CLASSIFICATION 2. Which of the following shows structure of allylic alcohol? NCERT Page-324/N-194 (i) CH2 = CH − CH2OH (ii) CH2 = CH − OH (iii) CH2 = CH − CH(CH3 )OH (iv) CH2 = CH − C(CH3 )2OH (a) (i), (iii) and (iv) (b) (i), (ii) and (iv) (c) (ii), (iii) and (iv) (d) (i), (ii), (iii) and (iv) 3. Which of the following is aliphatic dihydric alcohol? NCERT Page-325/ N-195 (a) Glycerol (b) Ethylene glycol (c) Catechol (d) Resorcinol 4. An example of a compound with functional group-O-is: NCERT Page N-198 (a) acetic acid (b) methylalcohol (c) diethyl ether (d) acetone 5. In which of the following structures hydroxyl group is attached to sp 2 carbon atom? NCERT Page-325/N-195 (a) (b) (C) (d)
6. Identify the secondary alcohols from the following set: (i) CH3CH2CH(OH)CH3 NCERT-N-194, CBSE Paper 2021-22 (i) CH3 − CH2 − CH(OH) − CH3 (ii) (C2H5 )3COH (iii) (d) (a) (i) and (iv) (c) (i) and (ii) (b) (i) and (iii) (d) (i), (iii) and (iv) 8.2 NOMENCLATURE 7. The IUPAC name of below compound is NCERT Page-325 & 326/N-197 (a) 1,1-dimethyl-1,3-butanediol (b) 2-methyl-2,4-pentanediol (c) 4-methyl-2,4-pentanediol (d) 1,3,3-trimethyl-1, 3-propanediol 8. Butane-2-ol is NCERT Page-329/N-194 (a) primary alcohol (b) secondary alcohol (c) tertiary alcohol (d) aldehyde 9. Cresol has NCERT Page-327/N-197 (a) Alcoholic-OH (c) −COOH (b) Phenolic- OH (d) −CHO 10. Vinyl Carbonyl is NCERT Page-N-197 (a) HO − CH2 − CH = CH2 (b) CH3C(OH) = CH2 (c) CH3 − CH = CH − OH (d) CH3 − C(CH2OH) = CH2 8.3 STRUCTURE OF FUNCTIONAL GROUP 11. The C − O − C angle in ether is about NCERT Page-329/N-198 (a) 180∘ (b) 190∘28′ (c) 110∘ (d) 105∘ 12. The C − O − H bond angle in alcolols is slightly less than the tetrahedral angle whereas the C − O − C bond angle in ether is slightly greater because NCERT Page-329/N-198 & 199 (a) of repulsion between the two bulky R groups.