Alcohols Phenols and Ethers Class 12 MCQ Questions is one of the best strategies to prepare for the CBSE Class 12 Board exam. If you want to complete a grasp concept or work on one’s score, there is no method except constant practice. Students can improve their speed and accuracy by doing more MCQ of Alcohols Phenols and Ethers class 12 which will help them all through their board test.
Alcohols Phenols and Ethers Class 12 MCQ
Class 12 Chemistry MCQ with answers are given here to chapter the Alcohols, Phenols and Ethers. These MCQs are based on the latest CBSE board syllabus and relate to the latest Class 12 Chemistry syllabus. By Solving these Class 12 MCQ, you will be able to analyze all of the concepts quickly in the chapter and get ready for the Class 12 Annual exam.
Learn Class 12 Chemistry Alcohols Phenols and Ethers MCQ with answers pdf free download according to the latest CBSE and NCERT syllabus. Students should prepare for the examination by solving CBSE Alcohols, Phenols and Ethers Class 12 MCQ with answers given below.
Question 1. Methanol is industrially prepared by
(a) oxidation of CH4 by steam at 900ºC
(b) reduction of HCHO using LiAIH4
(c) reaction of HCHO with a solution of NaOH
(d) reduction of CO using H2 and ZnO–Cr2O3
Question 2. The major products C and D formed in the following reactions respectively are
H3C−CH2−CH2−O−C(CH3)3 excess HI C + D
(a) H3C−CH2−CH2−I and I−C(CH3)3
(b) H3C−CH2−CH2−OH and I−C(CH3)3
(c) H3C−CH2−CH2−I and HO−C(CH3)3
(d) H3C−CH2−CH2−OH and HO−C(CH3)3
Question 3. Lucas reagent is
(a) conc. HCl and anhydrous ZnCl2
(b) conc. HNO3 and hydrous ZnCl2
(c) conc. HCl and hydrous ZnCl2
(d) conc. HNO3 and anhydrous ZnCl2.
Question 4. The major organic product in the reaction is
CH3 – O – CH(CH3)2 + HI products
(a) CH3I + (CH3)2CHOH
(b) CH3OH + (CH3)2CHI
Question 5. The heating of phenyl methyl ether with HI produces
(d) ethyl chloride.
Question 6. Among the following sets of reactants which one produces anisole?
(a) CH3CHO ; RMgX
(b) C6H5OH ; NaOH ; CH3I
(c) C6H5OH ; neutral FeCl3
(d) C6H5CH3 ; CH3COCl ; AlCl3
Question 7. Which one is formed when sodium phenoxide is heated with ethyl iodide?
(b) Ethyl phenyl alcohol
(d) None of these
Question 8. Ethyl chloride is converted into diethyl ether by
(a) Perkins reaction
(b) Grignard reaction
(c) Wurtz synthesis
(d) Williamson’s synthesis.
Question 9. Which one of the following compounds is resistant to nucleophilic attack by hydroxyl ions?
(a) Diethyl ether
(d) Methyl acetate
Question 10. The compound which does not react with sodium is
Question 11. Among the following the one which reacts most readily with ethanol is
(a) p-nitrobenzyl bromide
(b) p-chlorobenzyl bromide
(c) p-methoxybenzyl bromide
(d) p-methylbenzyl bromide
Question 12. Intermolecular hydrogen bonding is strongest in :
Question 13. Propan-1-ol can be prepared from propene by :
(a) H2O / H2SO4
(b) Hg(OAc)2 / H2O followed by NaBH4
(c) B2H6 followed by H2O2
Question 14. Lucas reagent is:
(a) anhy. AlCl3 + conc. HCl
(b) anhy. AlCl3 + conc.HNO3
(c) anhy. ZnCl2
(d) anhy. ZnCl2 + conc. HCl
Question 15. The most suitable reagent for the conversion of RCH2OH → RCHO is :
(d) PCC (pyridine chlorochromate)
Question 16. An organic compound ‘X’ with molecular fommla, C7H8O is insoluble in aqueous NaHCO3 but dissolves in NaOH. When treated with bromine water’ X’rapidly gives ‘Y’ C7H5OBr3 .
The compounds’ X’ and’ Y’ respectively, are
(a) benzyl alcohol and 2, 4, 6-tribromo-3-methoxy benzene
(b) benzyl alcohol and 2, 4, 6-tribromo-3-methyl phenol
(c) o-cresol and 3, 4, 5-tribromo-2-methyl phenol
(d) methoxybenzene and 2, 4, 6-tribromo-3-methoxy benzene
(e) m-cresol and 2, 4, 6-tribromo-3-methyl phenol
Question 17. Benzoylation of phenol in alkaline medium is known as
(a) Friedel-Crafts reaction
(b) Wurtz-Fittig reaction
(c) Schotten-Baurnann reaction
(d) Sabatier Senderens reduction
Question 18. When o- or p -phenol sulphonic acid is treated with bromine water, the product formed is
(a) 2, 4-dibromophenol
(b) 2, 4, 6-tribromophenol
(c) 3-bromophenol boric acid
(d) 3, 5-dibromophenol
Question 19. The final product of the following reaction is/are
Question 20. Phenol on heating with CCI4 and aqueous KOH gives salicylic acid. This reaction is
(a) Friedel-Craft reaction
(b) Diels-Alder reaction
(c) Reimer-Tiemann reaction
(d) Wittig reaction
Question 21. Among the following, which is least acidic?
(c) p -nitrophenol
(d) p -chlorophenol
Question 22. Phenol is more acidic than alcohol because
(a) phenol is more soluble in polar solvents
(b) alcohol does not lose hydrogen atom
(c) phenoxide ion is stabilised by resonance
(d) phenoxide ion doesn’t exhibit resonance
Question 23. Picric acid is a stronger acid than acetic acid and benzoic acid. It contains
(a) —SO3H group
(b) two—COOH groups
(c) phenolic group
(d) three—COOH groups
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Question 24. By heating phenol with chloroform in alkali, it is converted into
(a) salicylic acid
(d) phenyl benzoate
Question 25. C2H5O Hand C6H5OHcan be distinguished by
(a) Br2 + H2O
(c) I2 + NaOH
(d) Both (b) and (c)
Question 26. Which of the following compound would not evolve CO2 when treated with NaHCO3 solution?
(a) Salicylic acid
(c) Benzoic acid
(d) 4-nitrobenzoic acid
Question 27. The following reaction is known as
(a) Perkin reaction
(b) Gattermann reaction
(c) Kolbe reaction
(d) Gattermann-a.ldehyde reaction
Question 28. An organic compound X on treatment with pyridinium chlorochromate in dichloromethane gives compound Y. Compound Y reacts with I2 and alkali to form triiodomethane. The compound ‘X’ is
Question 29. CH3OC2H5 and (CH3)3 C – OCH3 are treated with hydroiodic acid. The fragments obtained after reactions are
(a) CH3I + HOC2H5; (CH3)3 Cl + HOCH3
(b) CH3OH + C2H5I; (CH3)3 Cl + HOCH3
(c) CH3OH + C2H5I; (CH3)3COH + CH3I
(d) CH3I + HOC2H5; CH3I + (CH3)3 COH.
Question 30. Which of the following is a primary halide?
(a) Iso-propyl iodide
(b) Secondary butyl iodide
(c) Tertiary butyl bromide
(d) Neohexyl chloride
Question 31. An aromatic ether is not cleaved by HI even at 525 K. The compound is
Question 32. Ethanol when reacted with PCl5 gives A, POCl3 and HCl. A reacts with silver nitrite to form B (major product) and AgCl. A and B respectively are
(a) C2H5 C l and C2H5OC2H5
(b) C2H6 and C2H5OC2H5
(c) C2H5 C l and C2H5NO2
(d) C2H6 and C2H5NO2
Question 33. Polyvinylalcohol can be prepared by
(a) polymerization of vinyl alcohol
(b) alkaline hydrolysis of polyvinyl acetate
(c) polymerization of acetylene
(d) reaction of acetylene with H2SO4 in presence of HgSO4
Question 34. The formation of diethyl ether from ethanol is based on :
(a) Dehydrogenation reaction
(b) Hydrogenation reaction
(c) Dehydration reaction
(d) Heterolytic fission reaction
Question 35. Chloropicrin is obtained by the reaction of
(a) steam on carbon tetrachloride
(b) nitric acid on chlorobenzene
(c) chlorine on picric acid
(d) nitric acid on chloroform
Question 36. Ethanol can be prepared more easily by which reaction ?
(i) CH3CH2Br + H2O → CH3CH2OH
(ii) CH3CH2Br + Ag2O (in boiling water)→ CH3CH2OH
(a) by (i) reaction
(b) by (ii) reaction
(c) Both reactions proceed at same rate
(d) by none
Question 37. The ether that undergoes electrophilic substitution reactions is
Question 38. A triglyceride can have how many different acyl groups?
Question 39. Which of the following fact(s) explain(s) as to why p-nitrophenol is more acidic than phenol?
I. –I Effect of nitro group.
II. Greater resonance effect of p-nitrophenoxy group
III. Steric effect of bulky nitro group
(a) I and II
(b) I and III
(c) II and III
(d) II alone
Question 40. ClCH2CH2OH is stronger acid than CH3CH2OH because of:
(a) – I effect of Cl increases negative charge on O atom of alcohol
(b) – I effect of Cl disperses negative charge on O atom to produce more stable cation
(c) – I effect of Cl disperses negative charge on O atom to produce more stable anion
(d) None of these
Question 41. Phenol on reaction with Br2 in non-polar aprotic solvent furnishes
(a) 2, 4, 6-tribromophenol
(c) o- and p-bromophenol
Question 42. In the Victor-Meyer’s test, the colour given by 1°, 2° and 3° alcohols are respectively.
(a) red, colourless, blue
(b) red, blue, colourless
(c) blue, red, violet
(d) red, blue, violet.
Question 43. Which one of the following is not formed when glycerol reacts with HI ?
(a) CH3 — CHI — CH3
(b) CH3 — CH = CH2
(c) CH2OH — CHI — CH2OH
(d) CH2 = CH — CH2I
Question 44. The reaction of Lucas reagent is fastest with:
(b) CH3(CH2 )2OH
Question 45. Following compounds are given:
(i) CH3CH2OH (ii) CH3COCH3
(iii) CH3 – CHOH
Which of the above compound(s), on being warmed with iodine solution and NaOH, will give iodoform?
(a) (i) and (ii)
(b) (i), (iii) and (iv)
(c) (i) only
(d) (i), (ii) and (iii)
Question 46. Ethanol when reacted with PCl5 gives A, POCl3 and HCl. A reacts with silver nitrite to form B (major product) and AgCl. A and B respectively are
(a) C2H5 Cl and C2H5OC2H5
(b) C2H6 and C2H5OC2H5
(c) C2H5Cl and C2H5NO2
(d) C2H6 and C2H5NO2
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