VBQ Alcohols Phenols and Ethers Class 12 Chemistry

VBQs Alcohols Phenols and Ethers Class 12 Chemistry with Alcohols Phenols and Ethers has been provided below for standard students. We have provided chapter wise VBQ for Class 12 Chemistry with Alcohols Phenols and Ethers. The following Alcohols Phenols and Ethers Class 12 Chemistry value based questions with answers will come in your exams. Students should understand the concepts and learn the solved cased based VBQs provided below. This will help you to get better marks in class 12 examinations.

Alcohols Phenols and Ethers VBQs Class 12 Chemistry

Question. Which one is formed when sodium phenoxide is heated with ethyl iodide ?
(a) Phenetole
(b) Ethyl phenyl alcohol
(c) Phenol
(d) None of these

Question. Phenol, when it first reacts with concentrated sulphuric acid and then with concentrated nitric acid, gives
(a) 2, 4, 6-trinitrobenzene
(b) o-nitrophenol
(c) p-nitrophenol
(d) nitrobenzene

Question. Which of the following cannot be made by using Williamson’s synthesis?
(a) Methoxybenzene
(b) Benzyl p-nitrophenyl ether
(c) Methyl tertiary butyl ether
(d) Di-tert-butyl ether

Question. 3 moles of ethanol react with one mole of phosphorus tribromide to form 3 moles of bromoethane and one mole of X. Which of the following is X?
(a) H₃PO₄
(b) H₃PO₂
(c) HPO₃
(d) H₃PO₃

Question. Alcohols of low molecular weight are
(a) soluble in water
(b) soluble in water on heating
(c) insoluble in water
(d) insoluble in all solvents

Question. In the reaction

(a) benzaldehyde
(b) chlorobenzene
(c) benzoic acid
(d) salicylic acid

Question. What is the correct order of reactivity of alcohols in the following reaction?

Question. The hydrocarbon which produce phenol and acetone as a by product in the large quantity is

Question. Which of the following compounds will react with sodium hydroxide solution in water?
(a) C₆H₅OH
(b) C₆H₅CH₂OH
(c) (CH₃)₃COH
(d) C₂H₅OH

Question. Mark the correct increasing order of reactivity of the following compounds with HBr/HCl

(a) A < B < C
(b) B < A < C
(c) B < C < A
(d) C < B < A

Question. 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. In the reaction

Phenol behaves as
(a) Bronsted base
(b) Bronsted acid
(c) Lewis acid
(d) Lewis base

Question. In the given reaction

Question. Monochlorination of toluene in sunlight followed by hydrolysis with aq. NaOH yields.
(a) o-Cresol
(b) m-Cresol
(c) 2, 4-Dihydroxytoluene
(d) Benzyl alcohol

Question. Aspirin is an acetylation product of
(a) p-Dihydroxybenzene
(b) o-Hydroxybenzoic acid
(c) o-Dihydroxybenzene
(d) m-Hydroxybenzoic acid

Question. An ether is more volatile than an alcohol having the same molecular formula. This is due to
(a) dipolar character of ethers
(b) alcohols having resonance structures
(c) inter-molecular hydrogen bonding in ethers
(d) inter-molecular hydrogen bonding in alcohols  

Question. Ethyl alcohol is industrially prepared from ethylene by
(a) Permanganate oxidation
(b) Catalytic reduction
(c) Absorbing in H₂SO₄ followed by hydrolysis
(d) All the three

Question. Which one of the following on oxidation gives a ketone ?
(a) Primary alcohol
(b) Secondary alcohol
(c) Tertiary alcohol
(d) All of these

Question. The fermentation reactions are carried out in temperature range of
(a) 20-30°C
(b) 30-40°C
(c) 40-50°C
(d) 50-60°C

Question. For the reaction,

the order of reactivity is
(a) HBr > HI > HCl
(b) HI > HCl > HBr
(c) HI > HBr > HCl
(d) HCl > HBr > HI

Question. Ether can be used
(a) as a general anaesthetic
(b) as a refrigerant
(c) in perfumery
(d) all of the above

Question. Methyl alcohol is toxic. The reason assigned is
(a) it stops respiratory track
(b) it reacts with nitrogen and forms CN– in the lungs
(c) it increses CO₂ content in the blood
(d) it is a reduction product of formaldehyde

Question. When phenol is heated with CHCl₃ and alcoholic KOH when salicyladehyde is produced. This reaction is known as
(a) Rosenmund’s reaction
(b) Reimer-Tiemann reaction
(c) Friedel-Crafts reaction
(d) Sommelet reaction

Question. Which enzyme converts glucose and fructose both into ethanol ?
(a) Diastase
(b) Invertase
(c) Zymase
(d) Maltase

Question. Phenol is less acidic than_______________ .
(a) ethanol
(b) o–nitrophenol
(c) o-methylphenol
(d) o-methoxyphenol

Question. Tonics in general contain
(a) Ether
(b) Methanol
(c) Ethanol
(d) Rectified spirit

Question. Methanol and ethanol can be distinguished by the following:
(a) By reaction with metallic sodium
(b) By reaction with caustic soda
(c) By heating with iodine and washing soda
(d) By heating with zinc and inorganic mineral acid

Question. Williamson’s synthesis is used to prepare
(a) acetone
(b) diethyl ether
(c) P.V.C.
(d) bakelite

Question. Denaturation of alcohol is the
(a) mixing of CuSO₄ (a foul smelling solid) and pyridine (to give the colour) to make the commercial alcohol unfit for drinking
(b) mixing of CuSO₄ (to give the colour) and pyridine (a foul smelling solid) to make the commercial alcohol unfit for drinking
(c) mixing of Cu(OAc)₂ and ammonia to make the commercial alcohol unfit for drinking
(d) mixing of Cu(OAc)₂ and pyridine to make the commercial alcohol unfit for drinking

Question. In order to make alcohol undrinkable pyridine and methanol are added to it. The resulting alcohol is called
(a) Power alcohol
(b) Proof spirit
(c) Denatured spirit
(d) Poison alcohol

Question. The reaction of sodium ethoxide with ethyl iodide to form diethyl ether is termed
(a) electrophilic substitution
(b) nucleophilic substitution
(c) electrophilic addition
(d) radical substitution

Question. The reaction given below is known as
C₂H₅ONa + IC₂H₅ → C₂H₅OC₂H₅ + NaI
(a) Kolbe’s synthesis
(b) Wurtz synthesis
(c) Williamson’s synthesis
(d) Grignard’s synthesis

Question. Wine (alcoholic beverages) contains
(a) CH₃OH
(b) Glycerol
(c) C₂H₅OH
(d) 2-propanol

Question. Ether which is liquid at room temperature is
(a) C₂H₅OCH₃
(b) CH₃OCH₃
(c) C₂H₅OC₂H₅
(d) None of these

Question. Which of the following are used to convert RCHO into RCH2OH?
(i) H₂/Pd
(ii) LiAlH₄
(iii) NaBH₄
(iv) Reaction with RMgX followed by hydrolysis
(a) (i) and (ii)
(b) (i), (ii) and (iii)
(c) (ii), (iii) and (iv)
(d) (i) and (iii)

Question. Arrange the following in increasing order of their acidity?
o–cresol(a), salicyclic acid(b), phenol(c)
(a) c < a < b
(b) b < c < a
(c) a < b < a
(d) a < c < b

Question. Which of the following compound is soluble in ether?
(a) Oils and fats
(b) Water
(c) NaCl
(d) PCl₅

Question. Ethanol is prepared industrially by
(a) hydration of ethylene
(b) fermentation of sugar
(c) Both the above
(d) None of these

Question. CH₃CH₂OH can be converted into CH₃CHO by ________
(a) catalytic hydrogenation
(b) treatment with LiAlH₄
(c) treatment with pyridinium chlorochromate
(d) treatment with KMnO₄

Question. Ethanol and dimethyl ether form a pair of functional isomers.
The boiling point of ethanol is higher than that of dimethyl ether, due to the presence of
(a) H-bonding in ethanol
(b) H-bonding in dimethyl ether
(c) CH₃ group in ethanol
(d) CH₃ group in dimethyl ether

MATCHING TYPE QUESTIONS

Question. Match the columns
Column-I                                    Column-II
(A) Methanol                            (p) Conversion of phenol to o-hydroxysalicylic acid
(B) Kolbe’s reaction                   (q) Wood spirit
(C) Williamson’s synthesis         (r) Heated copper at 573 K
(D) Conversion of 2° alcohol      (s) Reaction of alkyl halide with sodium alkoxide
to ketone            
(a) A – (s), B – (r), C – (q), D – (p)
(b) A – (q), B – (s), C – (p), D – (r)
(c) A – (q), B – (p), C – (s), D – (r)
(d) A – (r), B – (q), C – (p), D – (s)

Question. Match the columns

(a) A – (q), B – (p), C – (s), D – (r)
(b) A – (r), B – (p), C – (s), D – (q)
(c) A – (s), B – (q), C – (p), D – (r)
(d) A – (q), B – (r), C – (s), D – (p)

Question. Match the columns
Column-I                                  Column-II 
(A) Antifreeze used in               (p) Methanol
car engine
(B) Solvent used in                  (q) Phenol
perfumes
(C) Starting material for           (r) Ethleneglycol
picric acid
(D) Wood spirit                        (s) Ethanol
(a) A – (s), B – (q), C – (p), D – (r)
(b) A – (r), B – (s), C – (q), D – (p)
(c) A – (s), B – (q), C – (r), D – (p)
(d) A – (p), B – (r), C – (q), D – (s)