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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
The IUPAC name of `CH_(3)CH_(2)OCH(CH_(3))_(2)`is :A. isopropoxyethaneB. 2-methyoxybutaneC. 1-methyl-1-methoxyethaneD. 2-ethyoxypropane |
| Answer» Correct Answer - D | |
| 102. |
Following compounds are given (i) `CH_(3)CH_(2)OH` (ii) `CH_(3)COCH_(3)` (iii) `(CH_(3))_(2)CHOH` (iv) `CH_(3)OH` 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. only (ii)D. (i) ,(ii) and (iii) |
| Answer» Correct Answer - D | |
| 103. |
`CH_(3)overset(O)overset(||)"CCH"_(2)overset(O)overset(||)COCH_(3)` is reduced to `CH_(3)underset(OH)underset("| ")"CH"CH_(2)overset(O)overset(||)COCH_(3)` byA. `LiAlH_(4)`B. `NaBH_(4)`C. Both (a) and (b)D. None of these |
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Answer» Correct Answer -C `LiAlH_(4)` reduces ketonic as well as ester group, but `NaBH_(4)` reduces only ketonic group. |
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| 104. |
The missing structures `A` and `B` in the recation sequence: `R -CH_(2)-CH_(2)OH overset(AI(2)O_(3))underset(350^(@)C)rarrR-CH=CH_(2)overset((i)O_(3))underset((ii)Zn//H_(3)O)rarr` `RCHO +A, RCHO overset(Reduct)rarrB`, areA. `CH_(3)OH,RCOOH`B. Methanal, `RCH_(2)OH`C. Ethanal, `RCOOH`D. Methanal, `RCHOHR` |
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Answer» Correct Answer - B `R-CH_(2)CH_(2)OHoverset(A1_(2)O_(3))underset(350^(@)C)rarrR-CH=CH_(2)overset((i)O_(3))underset((ii)Zn,H_(3)O^(o+))rarr` `R-Cho +CH_(2)O (A)` `R-CHO overset("Methanol Reduce")rarr R-underset((B))(CH_(2)OH)` |
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| 105. |
A reaction characteristic of vicinal diols is their oxidative cleavage on treatment with periodic acid `(HIO_(4))`. The carbon-carbon bond of the vicinal diol uinit is broken and two carbonyl groups result. Periodic acid is reduced to iodic acid `(HIO_(3))` Cyclic diols react to give dicarbonyl compounds. The reactions are faster when the hydroxyl gorups are cid than when they are trans but both stereoisomers are oxidised by periodic acid. Periodic acid cleavage of vicinal diols is often used for analytic purposes as an aid in structure determination. By identifying the carbonyl compounds produced, The constitution of the diol may be deduced. Which of the following products is/are obtained when glycerol is treated with `HIO_(4)` ?A. HCHOB. HCOOHC. `HIO_(3)`D. All of these |
| Answer» Correct Answer - d | |
| 106. |
A reaction characteristic of vicinal diols is their oxidative cleavage on treatment with periodic acid `(HIO_(4))`. The carbon-carbon bond of the vicinal diol uinit is broken and two carbonyl groups result. Periodic acid is reduced to iodic acid `(HIO_(3))` Cyclic diols react to give dicarbonyl compounds. The reactions are faster when the hydroxyl gorups are cid than when they are trans but both stereoisomers are oxidised by periodic acid. Periodic acid cleavage of vicinal diols is often used for analytic purposes as an aid in structure determination. By identifying the carbonyl compounds produced, The constitution of the diol may be deduced. Which of the following diols will be oxidised by `HIO_(4)` ?A. `F-underset(F)underset(|)overset(F)overset(|)(C)-underset(OH)underset(|)overset(OH)overset(|)(C)-H`B. `{:(CH_(2)-OH),(|),(CH_(2)-OH):}`C. `overset(OH)overset(|)(C)H_(2)-CH_(2)-overset(OH)overset(|)(C)H_(2)`D. All of these |
| Answer» Correct Answer - b | |
| 107. |
A reaction characteristic of vicinal diols is their oxidative cleavage on treatment with periodic acid `(HIO_(4))`. The carbon-carbon bond of the vicinal diol uinit is broken and two carbonyl groups result. Periodic acid is reduced to iodic acid `(HIO_(3))` Cyclic diols react to give dicarbonyl compounds. The reactions are faster when the hydroxyl gorups are cid than when they are trans but both stereoisomers are oxidised by periodic acid. Periodic acid cleavage of vicinal diols is often used for analytic purposes as an aid in structure determination. By identifying the carbonyl compounds produced, The constitution of the diol may be deduced. Which of the following compounds (s) is / are obtained when the following compound is oxidixed by `HIO_(4)` ? A. B. `CH_(3)-overset(O)overset(||)(C )-CH_(3)`C. D. `CH_(3)-overset(O)overset(||)(C )-H` |
| Answer» Correct Answer - a,b | |
| 108. |
Propene, `CH_(3)-CH = CH_(2)`, can be converted to `1`-propanol by oxidation. Which set of reagents among the following is ideal to effect the conversion?A. Alkaline `KMnO_(4)`B. `B_(@)H_(6)`and alkaline `H_(2)O_(2)`C. `O_(3)//Zn`dustD. `OsO_(4)//NaHSO_(3)` |
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Answer» Correct Answer - B Diborane `H_(2)O_(2)//OH-`gives anti-Markownikoff addition of `H-OH` |
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| 109. |
Propene can be converted into 2-propanol by hydration. Which of the following reagents is ideal to affect the conversion ?A. Alkaline `KMnO_4`B. Zn dust+ `H_2O`C. conc. `H_2SO_4`D. conc. HCI |
| Answer» Correct Answer - C | |
| 110. |
Raju prepared soap in the chemistry lab. A liquid remained after the preparation. He argued that it was useless.1. Do you agree with him? Why? 2. How can you prepare glycerol from spentlye? |
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Answer» 1. No. It can be used to prepare glycerol. 2. Spentlye contains unreacted alkali, glycerol, water, NaCI, and soluble soap. It is first treated with acid to remove alkali, then with aluminium sulphate to remove soluble soap. It is then evaporated under reduced pressure to remove NaCI. The resulting solution is then decolorised using animal charcoal, Then the solution is distilled under reduced pressure to remove water. In this way we get glycerol. |
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| 111. |
Which of the following does not answer idoform test?(a) 1-propanol (b) Ethanol (c) 2 propanol (d) Ethanal |
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Answer» (a) 1- propanol |
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| 112. |
4-methoxy acetophenone can be prepared from anisol by ......... |
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Answer» Friedel crafts reaction. |
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| 113. |
a) Write suitable reagent or reagents used for the following conversions:b) Write a test to distinguish between phenol and alcohol. |
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Answer» a) i) aq.NaOH or aq,KOH ii) Conc. H2SO4 at 413 K iii) CHCI3 + aq. NaOH b)
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| 114. |
Which of the following alcohols can be obtained from HCHO?(a) CH3OH (b) C2H5OH (c) CH3CH2CH2CH2OH (d) All of these |
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Answer» (d) All of these |
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| 115. |
Phenol can be converted to o-hydroxy benzaldehyde by |
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Answer» Reimer-Tiemann reaction. |
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| 116. |
Arrange the following compounds in the increasing order of acidity:Phenol, Alcohol, and Water |
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Answer» Alcohol < Water < Phenol |
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| 117. |
1. Arrange the compounds in the increasing order of their strength.4-Nitro phenolPhenolPropan-1-ol4-Methyl phenol. 2. You are given benzene, conc.H2SO4 and NaOH. Prepare phenol using these compounds. |
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Answer» 1. 4-Nitrophenol > Phenol > 4-Methylphenol > 1- Propanol. Presence of electron with drawing groups at ortho and para positions increases the acidic strength of substituted phenols. 2. By the action of benzene with conc.H2SO4 & NaOH, sodium benzene sulphonate is formed. This on acidification gives phenol. |
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| 118. |
Ethers are kept in air tight brown bottles because A. Ethers absorb moisture B. Ethers evaporate readily C. Ethers oxidise to explosive peroxide D. Ethers are inert |
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Answer» Correct answer is C. Ethers oxidise to explosive peroxide |
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| 119. |
Which of the following isomers is more volatile : o-nitrophenol or p-nitrophenol? |
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Answer» The isomer o-nitrophenol with lower boiling point is more volatile. |
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| 120. |
Ether free from moisture and alcohol is known as,(a) dry ether (b) absolute ether (c) pure ether (d) spirit ether |
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Answer» Option : (b) absolute ether |
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| 121. |
Which of the following alcohols is prepared by acid catalyzed hydration of alkenes?(a) Butan-l-ol (b) Propan-l-ol (c) Ethanol (d) Methanol |
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Answer» Option : (c) Ethanol |
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| 122. |
Which of the following compounds gives 3-ethyl- pentan-3-ol by the action of ethyl magnesium iodide followed by acid hydrolysis?(a) Propanone(b) Butanone (c) Pentan-2-one (d) Pentan-3-one |
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Answer» Option : (d) Pentan-3-one |
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| 123. |
To prepare 3-Ethylpentan-3-ol, the reagents needed are :(a) CH3CH2MgBr + CH3COCH2CH3(b) CH3MgBr + CH3CH2CH2COCH2CH3(c) CH3CH2MgBr + CH3CH2COCH2CH3(d) CH3CH2CH2MgBr + CH3COCH2CH3 |
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Answer» Option : (c) CH3CH2MgBr + CH3CH2COCH2CH3 |
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| 124. |
Classify the following alcohols as 1°/2°/3° and allylic/benzylic |
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Answer» (1) Ally lie alcohol (primary) (2) Allylic alcohol (secondary) (3) Allylic alcohol (tertiary) (4) Benzylic alcohol (primary) (5) Benzylic alcohol (secondary) |
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| 125. |
Acylation of alkyl phenyl ether givesA. 2-alkoxy alkyl phenyl ketone (major)B. 4-alkoxy alkyl phenyl ketone (minor)C. 4-alkoxy alkyl phenyl ketone (major)D. 3-alkoxy alkyl phenyl ketone (major) |
| Answer» Correct Answer - C | |
| 126. |
Reaction used to convert acid to `1^@` alcohol isA. oxidationB. reductionC. polymerisationD. pyrolysis |
| Answer» Correct Answer - B | |
| 127. |
Benzaldehyde and phenyl magnesium halide givesA. Benzyl alcoholB. diphenyl ketoneC. diphenyl ethanolD. diphenyl methanol |
| Answer» Correct Answer - D | |
| 128. |
Which reagent can bring about `R-COOH to R-CH_2-OH`A. Sn + HClB. `Na+C_2H_5OH`C. `H_2` + PtD. `LiAlH_4` |
| Answer» Correct Answer - D | |
| 129. |
The most suitable reagent for convertion of `R-CH_2-OH to R -CHO` isA. neutral `KMnO_4`B. PCCC. acidic `K_2Cr_2O_7`D. `CrO_3` |
| Answer» Correct Answer - B | |
| 130. |
Kolbes - Schmidt reaction is used to prepareA. salicylic acidB. salicylaldehydeC. phenyl acetateD. o-xylene |
| Answer» Correct Answer - A | |
| 131. |
Consider the reaction Identify `A, X, Y and Z`A. (A)-Methyoxymethane, (X)-Ethanol , (Y)-Ethanoix acid, (Z)-Semicarbazide.B. (A)-Ethanal, (X)-Ethanol, (Y)-But-2-enal,(Z)-SemicarbazoneC. (A)-Ethanol,(X)-Acetaldehyde,(Y)-Butanone,(Z)-HydrazoneD. )A)-Methoxymethane,(X)-Ethanoic acid, (Y)-Acetate ion, (Z)-Hydrazine |
| Answer» Correct Answer - B | |
| 132. |
Methy`1-`tert-buty`1` ether on heating with `HI` of one molar concentration givesA. `CH_(3)OH+(CH_(3))_(3)C-I`B. `CH_(3)I+(CH_(3))_(2)C-OH`C. `CH_(3)I+(CH_(3))_(3)C-Cl`D. none of the above |
| Answer» Correct Answer - A | |
| 133. |
`C_(6)H_(5)-O-CH_(3)+HI_((excess))rarr`A. `CH_(3)OH and C_(6)H_(5)I`B. `CH_(3)I and C_(6)H_(5)OH`C. `CH_(3)I and C_(6)H_(5)I`D. `C_(6)H_(6) and CH_(4)` |
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Answer» Correct Answer - B |
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| 134. |
`C_(2)H_(5)-O-C_(2)H_(5)+HI_(excess)rarr`A. `C_(2)H_(5)OH and C_(2)H_(5)I`B. `2 moles of C_(2)H_(5)I`C. `2molesof C_(2)H_(5)OH`D. `C_(2)H_(4)` |
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Answer» Correct Answer - B |
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| 135. |
Which of the following is strongest Lewis BaseA. `H_(2)O`B. `CH_(3)OH`C. `CH_(3)OCH_(3)`D. `C_(6)H_(5)OH` |
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Answer» Correct Answer - C |
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| 136. |
Place the following alcohols in decreasing order of rate of dehydration with `H_(2)SO_(4)`. `CH_(3)CH_(2)CHunderset((A))((OH))CH_(2)CH_(2)CH_(3)` `(CH_(3))_(2)Cunderset((B))((OH))CH_(2)CH_(2)CH_(3)` `(CH_(3))_(2)Cunderset((C))((OH))CH(CH_(3))_(2)` `CH_(3)CH_(2)CHunderset((D))((OH))CH(CH_(3))_(2)` `CH_(3)CH_(2)CH_(2)underset((E))(CH_(2))CH_(2)CH_(2)OH`A. `III gt II gt IV gt V I`B. `III gt II gt IV gt I gt V`C. `III gt II gt I gt IV gt V`D. `III gt II gt I gt V gt IV` |
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Answer» Correct Answer - B The alcohols (II) and (III) both are `3^(@)`, but alcohol (III) gives a more substituted alkene, Alcohol (IV) and (I) both are `2^(@)`, but alcohol (IV) can give a more substituted alkene and alcohol (V) is `1^(@)`.Rate of dehydration of alcohols with conc. `H_(2)SO_(4)` follows the order `3^(@) gt 2^(@) gt 1^(@)` |
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| 137. |
Match List I with List II and choose the correct code A. `{:("A B C D"),("1 2 3 4"):}`B. `{:("A B C D"),("3 4 1 2"):}`C. `{:("A B C D"),("1 2 3 4"):}`D. `{:("A B C D"),("2 3 1 4"):}` |
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Answer» Correct Answer - A Product-1 : acetaldehyde (functional isomers of epxide), Product-2 : s-butyl alcohol, Product-3 : ethylamine and Product-4 : ethyl alcohol. |
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| 138. |
Which of the following alcohols is unable to turn orange colour of chromic acid green ?A. Primary alcoholB. Secondary alcoholC. Tertiary alcoholD. Allyl alcohol |
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Answer» Correct Answer - C Tertiary alcohol offers resistance to oxidation. Hence, `Cr^(3+)` ions are not formed and the solution does not turn green. |
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| 139. |
Which of the following alcohols is unable to turn orange colour of chromic acid green ?A. `1^(@)` alcoholB. `2^(@)` alcoholC. `3^(@)` alcoholD. Allyl alcohol |
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Answer» Correct Answer - C `3^(@)` alcohol offers resistance to oxidation. Hence, `Cr^(3+)` ions are not formed, and hence the solution does not turn green. |
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| 140. |
Glycerol is more viscous than propan-1-ol due toA. many hydrogen bonding per moleculeB. high B.P.C. high molecular weightD. more Lewis basic character |
| Answer» Correct Answer - A | |
| 141. |
`C_2H_5OH` has higher B.P. than, `C_2H_5-SH` due toA. associationB. dissociationC. low molecular massD. two lone pair of electron on oxygen |
| Answer» Correct Answer - A | |
| 142. |
conc. `H_2SO_4` reacts with `C_2H_5OH` at 443K to formA. `CH_3COCH_3`B. `CH_3COOH`C. `CH_3CHO`D. `C_2H_4` |
| Answer» Correct Answer - D | |
| 143. |
Which one is the most acidic compound?A. B. C. D. |
| Answer» Correct Answer - C | |
| 144. |
Phenols react with ferric chloride solution to give `:`A. blue colourationB. purple colourationC. green colourationD. all of these |
| Answer» Correct Answer - D | |
| 145. |
2-Phenylethanol may be prepared by the reaction of phenyl magnesium bromide with :A. HCHOB. `CH_(3)CHO`C. `CH_(3)COCH_(3)`D. |
| Answer» Correct Answer - D | |
| 146. |
Which of the following is soluble in water?A. `CS_(2)`B. `C_(2)H_(5)OH`C. `C C1_(4)`D. `CHC1_(3)` |
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Answer» Correct Answer - B Ethanol `(C_(2)H_(5)OH)` forms hydrogen bonding with water. Hence, it is solube in water. |
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| 147. |
Explain briefly |
| Answer» `overset(Theta)(O) CH_(3)` is a strong base and hence a bad leaving group hence both the ethers are inert towards nucleophilic attack | |
| 148. |
Ether and alcohol are …………. Isomers.A. chainB. positionC. functionalD. not isomers |
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Answer» Correct Answer - C The general formula for ethers and alcohols both is `C_(n)H_(2n+n)O` but the functional group present in ethers is `-O-` and in alcohols is `-OH`, so they are functioanl isomers. |
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| 149. |
Which of the following compounds is optically active?A. 1-butanolB. Isopropyl alcoholC. AcetaldehydeD. 2-butanol |
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Answer» Correct Answer - D `{:(" "OH),(" |"),(CH_(3)CH_(2)-.^(**)C-CH_(3)),(" |"),(" "H):}` `therefore" "`2-butanol having chiral carbon atom, is optically active. |
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| 150. |
Which of the following compounds is optically active ?A. ButanalB. ButanolC. Butan-2-olD. 2-methyl propane-2-ol |
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Answer» Correct Answer - C `underset((C^(**)" = chiral carbon atom"))underset("Butan-2-ol")(CH_(3)-CH_(2)-overset(H)overset(|)underset(OH)underset("| ")(C^(**))-CH_(3))` So, butan-2-ol is optically active because of presence of chiral carbon. |
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