NEET Chemistry Alcohols Phenols and Ethers MCQs Set B

Question:

B is

• a) (CH₃)₃CHO
• b)

  

• c) (CH₃)₂CHCOCH₃
• d)

  

Answer:

Question:

Product (C) is

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Ethyl chloride is converted into diethyl ether by

• a) Perkin’s reaction
• b) Grignard reaction
• c) Wurtz synthesis
• d) Williamson’s synthesis

Answer: Williamson’s synthesis

Question: Ethylene oxide when treated with Grignard reagent yields

• a) Primary alcohol
• b) Secondary alcohol
• c) Tertiary alcohol
• d) Cyclopropyl alcohol

Answer: Primary alcohol

Question:

Product (C) is

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question:

• a) Alkyl iodide
• b) Vinyl chloride
• c) Vinyl iodide
• d) Allyl chloride

Answer: Allyl chloride

Question:

The product is

• a)

  

• b)

  

• c) Mixture of (1) & (2)
• d) No reaction

Answer:

Question:

What is B?

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question:

Product (C) is

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Reaction of phenol with chloroform in presence of dilute sodium hydroxide finally introduces which one of the following functional group?

• a) –CHCl₂ 
• b) –CHO
• c) –CH₂Cl 
• d) –COOH

Answer:  –CHO

Question:  Which of the following is not the product of dehydration of 

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question:  Which of the following reaction(s) can be used for the preparation of alkyl halides?

• a) (IV) only
• b) (III) and (IV) only
• c) (I), (III) and (IV) only
• d) (I) and (II) only

Answer: (I), (III) and (IV) only

Question:  The reaction

is called 

• a) Gatterman - Koch reaction
• b) Williamson synthesis
• c) Williamson continuous etherification process
• d) Etard reaction

Answer: Williamson synthesis

Question: Among the following sets of reactants which one produces anisole ?

• a) CH₃CHO; RMgX 
• b) C₆H₅OH; NaOH; CH₃I
• c) C₆H₅OH; netural FeCl₃
• d) C₆H₅–CH₃; CH₃COCl; AlCl₃  

Answer:  C₆H₅OH; NaOH; CH₃I

Question:  Among the following ethers, which one will produce methyl alcohol on treatment with hot concentrated HI ?

• a)

  

• b)

  

• c)

  

• d)  CH₃–CH₂–CH₂–CH₂–O–CH₃

Answer:

Question:  In the following reaction :

The major product is

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question:  Identity Z in the sequence of reactions

• a) CH₃–(CH₂)₃–O–CH₂CH₃
• b) (CH₃)₂CH₂–O–CH₂CH₃
• c) CH₃(CH₂)₄–O–CH₃
• d) CH₃CH₂–CH(CH₃)–O–CH₂CH₃

Answer:   CH₃–(CH₂)₃–O–CH₂CH₃

Question:  In the following reactions,

The major products (A) and (C) are respectively 

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Which among the following show tautomerism?

• a) Alcohols
• b) Phenol
• c) Ethers
• d) Anisole

Answer: Phenol

Question:  Among the following four compounds

a. Phenol

b. Methyl phenol

c. m-Nitrophenol

d. P-nitrophenol

The acidity order is 

• a) d > c > a > b
• b) c > d > a > b
• c) a > d > c > b
• d) b > a > c > d

Answer: d > c > a > b

Question: When glycerol is treated with excess of HI, it produces

• a) 2-iodopropane 
• b) Allyl iodide
• c) Propene
• d) Glycerol triiodide

Answer:  2-iodopropane 

Question: Which one of the following compounds has the most acidic nature ?

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Which one of the following compounds will be most readily dehydrated ?

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Which of the following conformers for ethylene glycol is most stable?

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question:  Consider the following reaction,

• a) CH₃CH₂–O–CH₂–CH₃
• b) CH₃–CH₂–O–SO₃H  
• c) CH₃CH₂OH
• d) CH₂= CH₂

Answer:  CH₃CH₂OH

Question:  Consider the following reaction

The product Z is 

• a) Benzaldehyde
• b) Benzoic acid
• c) Benzene
• d) Toluene

Answer: Benzoic acid

Question:  H₂COH.CH₂OH on heating with periodic acid gives 

• a) 2HCOOH
• b)

  

• c)

  

• d) 2 CO₂

Answer:

Question:   The major organic product in the reaction, CH₃–O– CH(CH₃)₂+ HΙ→ Product is

• a) CH₃OH + (CH₃)₂CHI  
• b) ΙCH₂OCH(CH₃)₂
• c)

  

• d) CH₃ Ι + (CH₃)₂CHOH

Answer:  CH₃ Ι + (CH₃)₂CHOH

Question: Ethylene oxide when treated with Grignard reagent yields

• a) Secondary alcohol
• b) Tertiary alcohol
• c) Cyclopropyl alcohol
• d) Primary alcohol

Answer: Primary alcohol

Question: Which one of the following compounds is most acidic?

• a) Cl–CH₂–CH₂–OH
• b)

  

• c)

  

• d)

  

Answer:

Question:  When 3, 3-dimethyl 2-butanol is heated with H₂SO₄, the major product obtained is

• a) 2, 3-dimethyl 2-butene
• b) cis and trans isomers of 2, 3-dimethyl 2-butene
• c) 2, 3-dimethyl 1-butene
• d) 3, 3-dimethyl 1-butene

Answer: 2, 3-dimethyl 2-butene

Question:  Decreasing order of reactivity of hydrogen halide acids in the conversion of ROH → RX is

• a) HCl > HBr > HI > HF
• b) HI > HBr > HCl > HF
• c) HF > HCl > HBr > HI
• d) HF > HBr > HI > HCl

Answer: HI > HBr > HCl > HF

Question:  Which reagent converts propene to 1-propanol?

• a) H₂O, H₂SO₄
• b) B₂H₆, H₂O₂, OH^–
• c) B₂H₆, H₂O₂, OH^–
• d) Aq. KOH

Answer: B₂H₆, H₂O₂, OH^–

Question: n-propyl alcohol and isopropyl alcohol can be chemically distinguished by which reagent?

• a) PCl₅  
• b) Reduction
• c) Oxidation with potassium dichromate
• d) Ozonolysis

Answer: Oxidation with potassium dichromate

Question: Which one of the following will not form a yellow precipitate on heating with an alkaline solution of iodine?

• a) CH₃CH(OH)CH₃  
• b) CH₃CH₂CH(OH)CH₃
• c) CH₃OH  
• d) CH₃CH₂OH

Answer:  CH₃OH  

Question: The general molecular formula, which represents the homologous series of alkanols is

• a) C_nH_{2n + 2}O 
• b) C_nH_2nO₂
• c) C_nH_2nO 
• d) C_nH_{2n + 1}O

Answer: C_nH_{2n + 2}O 

Question:  On heating glycerol with conc. H₂SO₄, a compound is obtained which has bad odour. The compound is

• a) Acrolein
• b) Formic acid
• c) Allyl alcohol
• d) Glycerol sulphate

Answer: Acrolein

Question:  The correct acidic order of the following is

• a) I > II > III
• b) III > I > II
• c) II > III > I
• d) I > III > II

Answer: III > I > II

Question:  When phenol is treated with CHCl₃ and NaOH, the product formed is

• a) Benzaldehyde
• b) Salicylaldehyde
• c) Salicylic acid
• d) Benzoic acid

Answer: Salicylaldehyde

Question: The compound which does not react with sodium, is

• a) CH₃COOH  
• b) CH₃– CHOH – CH₃
• c) C₂H₅OH 
• d) CH₃– O – CH₃

Answer:  CH₃– O – CH₃

Question:  Reaction of 

with RMgX leads to formation of

• a) RCH₂CH₂OH 
• b) RCHOHCH₃
• c) RCHOHR
• d)

  

Answer:  RCH₂CH₂OH 

Question: Which of the following will not be soluble in sodium hydrogen carbonate?

• a) 2,4,6-trinitrophenol
• b) Benzoic acid
• c) o-Nitrophenol
• d) Benzenesulphonic acid

Answer: o-Nitrophenol

Question:  IUPAC name of HOCH₂CH₂OH is:

• a) Ethylene glycol
• b) Ethane-1,2-diol
• c) Ethyl-1,2-diol
• d) Ethylene diol

Answer: Ethane-1,2-diol

Question: Which among the following show tautomerism?

• a) Alcohols
• b) Phenol
• c) Ethers
• d) Anisole

Answer: Phenol

Question: Alcohols and ethers are

• a) Position isomers
• b) Functional isomers
• c) Chain isomers
• d) Metamers

Answer: Functional isomers

Question: How many minimum number of carbons are needed for an optically active ether?

• a) 2
• b) 3
• c) 4
• d) 5

Answer: 5

Question:

The final product is

• a) Alkyl chloride
• b) Alkyl sulphate
• c) Alkene
• d) Ether

Answer: Alkyl chloride

Question: Grignard reagent is suitable reagent for the preparation of which of the following, from carbonyl compound?

• a) 1° alcohols
• b) 2° alcohols
• c) 3° alcohols
• d) All of these

Answer: All of these

Question: Lowest boiling point is for

• a) Butanol
• b) Pentanol
• c) 2-methyl propane-2-ol
• d) 2-methyl butane-2-ol

Answer:  2-methyl propane-2-ol

Question:  3° alkyl halides form alcohols preferably via

• a) S_N2  
• b) S_N1
• c) Transition state
• d) S_Ni

Answer:  S_N1

Question:  1° alcohols preferably undergo dehydration via

• a) E₁
• b) E₂
• c) S_N1 
• d) S_N2

Answer: E₂

Question: Lucas test is used to distinguish

• a) Phenols
• b) Ethers
• c) Alcohols
• d) Alkyl halides

Answer: Alcohols

Question: In Lucas test immediate turbidity is caused by

• a) 3° alcohols
• b) 2° alcohols
• c) 1° alcohols 
• d) Phenol

Answer:  3° alcohols

Question: Phenols can be distinguished from alcohols by

• a) FeCl₃(neutral)
• b) Fehling solution
• c) Tollen’s reagent
• d) 2,4-DNP

Answer:   FeCl₃(neutral)

Question: Electrophile in Reimer-Tiemann reaction

• a) CHCl₃
• b) : CH₂
• c) : CCl₂
• d) CO₂

Answer: : CCl₂

Question: Order of nucleophilicity is

• a) CH₃O^– < C₂H₅O^–
• b) C₂H₅O^– < C₂H₅S^–
• c) CH₃O^– < CH₃S^–   
• d) All of these

Answer: All of these

Question: In Reimer-Tiemann reaction, the major product is

• a) Ortho isomer due to intra molecular H-bonding
• b) Meta isomer
• c) Para isomer due to symmetry
• d) None of these

Answer: Ortho isomer due to intra molecular H-bonding

Question:  Which of the following will not give positive test with neutral FeCl₃?

• a) Nitrophenol
• b) Phenol
• c) Allyl alcohol
• d) o-cresol

Answer: Allyl alcohol

Question: Reaction of t-butyl bromide with sodium methoxide produces

• a) Sodium t-butoxide 
• b) t-butyl methyl ether
• c) Isobutane
• d) Isobutylene

Answer: Isobutylene

Question: More acidic than ethanol is

• a) CH₃CH₂CH₂CH₂CH₂CH₂CH₂CH₃
• b) CH₃CO₂CH₂CH₃ 
• c) CH₃COCH₂COCH₃
• d) CH₃COCH₃

Answer:  CH₃COCH₂COCH₃