NEET Chemistry Chapter Wise Mock Test – Alcohols, Phenols and Ethers

NEET Chemistry Chapter Wise Mock Test – Alcohols, Phenols and Ethers

Question 1.
Industrially ethyl alcohol is prepared from ethylene by
(a) permanganate oxidation
(b) fermentation
(c) catalytic reduction
(d) absorbing in H₂S0₄ followed by hydrolysis

Question 2.
For the sequence of reactions,

The compound A in the sequence is
(a) 2-butanone
(b) acetaldehyde
(c) acetone
(d) propanal

Question 3.
Ethylene oxide when treated with Grignard reagent yield
(a) secondary alcohol
(b) tertiary alcohol
(c) cyclopropyl alcohol
(d) primary alcohol

Question 4.
Which of the following is not a characteristic of alcohol?
(a) They are lighter than water
(b) Their boiling points rise fairly uniformly with rising molecular weight
(c) Lower members are insoluble in water and organic solvents but the solubility regularly increases with molecular mass
(d) Lower members have a pleasant smell and burning taste, higher members are colourless and tasteless

Question 5.
Arrange the following compounds in increasing order of boiling point. Propan-1-ol, butan-1-ol, butan-2-ol, pentan-1 -ol.
(a) Propan-1-ol, butan-2-ol, butan-1-ol, pentan-1-ol
(b) Propan-1-ol, butan-1-ol, butan-2-ol, pentan-1-ol
(c) Pentan-1-ol, butan-2-ol, butan-1-ol, propan-1-ol
(d) Pentan-1-ol, butan-1-ol, butan-2-ol, propan-1-ol

Question 6.

Question 7.
Conversion of ethyl alcohol into acetaldehyde is an example of
(a) molecular rearrangement
(b) oxidation
(c) reduction
(d) hydrolysis

Question 8.
Ethyl alcohol on oxidation with K₂Cr₂O₇ gives
(a) acetic acid
(b) acetaldehyde
(c) formaldehyde
(d) formic acid

Question 9.
When primary alcohol is oxidised with Cl₂, it gives
(a) CH₃CHO
(b) CH₃COCH₃
(c) CH₃COCl
(d) COCl₂

Question 10.
A compound is soluble in cone. H₂SO₄ It does not decolourise Br₂ in CCl₄ but oxidised by chromic anhydride in sulphuric acid, within two seconds, turning orange solution to blue green, then opaque. The original solution contains
(a) secondary alcohol
(b) an ether
(c) an alkene
(d) a primary alcohol

Question 11.
The most suitable reagent for the conversion of
RCH₂OH ———> R CHO is
(a) KMn0₄
(b) K₂Cr₂O₇
(c) CrO₃
(d) PCC (pyridinium chloro chromate)

Question 12.
Isopropyl alcohol on oxidation gives
(a) acetone
(b) ether
(c) ethylene
(d) acetaldehyde

Question 13.
The alcohol that produces turbidity immediately with ZnCl₂/conc. HCl at room temperature is
(a) 1-hydroxy butane
(b) 2-hydroxy butane –
(c) 2-hydroxy-2-methyl propane
(d) 1-hydroxy-2-methyl propane

Question 14.

Question 15.

Question 16.

Question 17.

Question 18.

Question 19.

Question 20.

Question 21.

Question 22.

Question 23.

Question 24.

Question 25.

Question 26.

Question 27.

Question 28.
Salicylic acid is prepared from phenol by
(a) Reimer-Tiemann reaction
(b) Kolbe’s reaction
(c) Kolbe’s electrolysis reaction
(d) None of the above

Question 29.
The final product of the following reaction is/are

Question 30.
When methyl f-butyl ether is formed?
(a) (C₂H₅)₃CONa+CH₃Cl
(b) (CH₃)₃CONa+C₂H₅Cl
(c) CH₃ONa+(CH₃)₃CCl
(d) (CH₃)₃CONa+ CH₃Cl

Question 31.
From Williamson’s synthesis preparation of which of the following is possible?
(a) Only symmetrical ethers
(b) Only asymmetrical ethers
(c) Both (a) and (b)
(d) None of these

Question 32.
Tert-butyl methyl ether on heating with HI gives a mixture of
(a) Tert-butyl alcohol and methyl iodide
(b) Tert-butyl iodide and methanol
(c) isobutyleneand methyl iodide
(d) isobutylene and methanol

Question 33.
Which one of the following reaction does not yield an alkyl halide?
(a) Diethyl ether+Cl₂ (in the dark)
(b) Diethyl ether+PCl₅
(c) Diethyl ether+HI

Direction (Q.No. 34-35): In the following questions more than one of the answers given may be correct. Select the correct answers and mark it according to the codes.
Codes
(a) 1, 2 and 3 are correct
(b) 1 and 2 are correct
(c) 2 and 4 are correct
(d) 1 and 3 correct

Question 34.
Choose the correct statement about crotyl alcohol.
1. It is a primary alcohol
2. It contains one -CH₂ unit more than allyl alcohol
3. It gives test of unsaturation
4. It is an isomer of allyl alcohol

Question 35.
Diethyl ether is obtained by the reaction of
1. sodium ethoxide with methyl iodide
2. sodium ethoxide with ethyl chloride
3. ethanol with red phosphorus
4. ethanol with cone. H₂S0₄

Question 36.

Direction (Q.Nos. 37-42): Each of these questions contains two statements : Assertion and Reason. Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select one of the codes (a), (b) ,(c) and (d) given below.
(a) Assertion is true, Reason is true; Reason is the correct explanation for Assertion
(b) Assertion is true, Reason is true; Reason is not the correct explanation for Assertion
(c) Assertion is true, Reason is false
(d) Assertion is false, Reason is true

Question 37.
Assertion: Primary and secondary alcohols can be distinguished by Victor-Meyer’s test.
Reason: Primary alcohols form nitrolic acid which dissolved in NaOH to form blood red colouration but secondary alcohols form pseudonitroles which gives blue colouration with NaOH.

Question 38.
Assertion: t-butyl methyl ether is not prepared by the reaction of t-butyl bromide with sodium methoxide.
Reason: Sodium methoxide is a strong nucleophile.

Question 39.
Assertion: Solubility of n-alcohol in water decreases with increase in molecular weight.
Reason: The reactive proportion of the hydrocarbon part in alcohols increases with increasing molecular weight which permits enhanced hydrogen bonding with water.

Question 40.
Assertion: Phenoxide ion on treatment with active alkyl halide (e.g. CH₂=CH—CH₂CI) gives two products viz O-substituted and C-substituted.
Reason: Phenoxide ion is an ambident nucleophile.

Question 41.

Question 42.
The reaction

is called
(a) Williamson synthesis
(b) Williamson continuous etherification process
(c) Etard reaction
(d) Gattermann-Koch reaction

Question 43.
The order of stability of the following tautomeric compounds is

(a) III > II > I
(b) II > III > I
(c) II > I > III
(d) I > II >111

Question 44.
Among the following ethers, which one will produce methyl alcohol on treatment with hot concentrated HI?

Question 45.
On shaking H₂O₂ with acidified potassium dichromate and ether, etheral layer becomes
(a) green
(b) red
(c) blue
(d) brown

Question 46.
Dunston’s test is used for identification of
(a) glycerol
(b) acetone
(c) glycol
(d) ethanol

Question 47.
Etherates are
(a) ethers
(b) solution in ether
(c) complexes of ethers with Lewis acid
(d) complexes of ethers with Lewis base

Question 48.
In the following reactions,

Question 49.
Dehydration of alcohol is an example of which type of reaction?
(a) Substitution
(b) Elimination
(c) Addition
(d) Rearrangement

Question 50.
p-cresol reacts wfth chloroform in alkaline medium to give a compound A which adds hydrogen cyanide to form another compound B. This latter on acidic hydrolysis gives chiral carboxylic acid. The structure of the carboxylic acid is

Question 51.
Which one of the following compounds has the most acidic nature?

Question 52.
Among the given compounds, one which can be distinguished by AgN0₃ is
(a) ethane
(b) ethylene
(c) acetylene
(d) diethyl ether

Answers:

Hints And Solutions:

ChemistryPhysicsBiology