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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.
| 351. |
(A ) Acidic character of alcohols follows the order `:` Primary `gt` Secondary `gt` Tertiary (R ) Acidic character of alcohols is due to the presence of polar O-H group.A. If both (A) and (R ) are correct and (R ) is correct explanation of (A ).B. If both (A ) and (R ) are correct but (R ) is not correct explanation of (A ).C. If (A) is correct but (R ) is incorrectD. If (A) is incorrect but (R ) is correct. |
| Answer» Correct Answer - B | |
| 352. |
1-butanol is oxidised by acidified `K_2Cr_2O_7` give,A. butanalB. butanoic acidC. buteneD. butane |
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Answer» Correct Answer - B 1-butanol is treated with acidified `K_2Cr_2O_7` oxidation gives butanoic acid and. when treated with mild oxidising agent it give butanal. |
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| 353. |
(A) `CH_(3)OH` is a nuelophile (R ) `CH_(3)OH` forms sodium methoxide on treatment with NaOH.A. If both (A) and (R ) are correct and (R ) is correct explanation of (A ).B. If both (A ) and (R ) are correct but (R ) is not correct explanation of (A ).C. If (A) is correct but (R ) is incorrectD. If (A) is incorrect but (R ) is correct. |
| Answer» Correct Answer - B | |
| 354. |
When 2-methyl butane-1-ol is dehydrated to give an alkene, the preferred product isA. 2-methyl 2-buteneB. 2-methyl 1-buteneC. 2-methyl 1-propeneD. n-hexene |
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Answer» Correct Answer - A `(CH_3)_2C(OH)(C_2H_5) overset(20% H_2SO_4 // 363 K)to (CH_3)_2C=CHCH_3 + H_2O` |
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| 355. |
(A) Alcohols can be dried over anhydrous `CaCl_(2)` (R ) Anhydrous `CaCl_(2)` absorbs moisture of aqueous ethyl alcohol.A. If both (A) and (R ) are correct and (R ) is correct explanation of (A ).B. If both (A ) and (R ) are correct but (R ) is not correct explanation of (A ).C. If (A) is correct but (R ) is incorrectD. If (A) is incorrect but (R ) is correct. |
| Answer» Correct Answer - D | |
| 356. |
Which of the following organic compounds could not be dried by anhydrous `CaCl_(2)` ?A. EthanolB. BenzeneC. ChloroformD. Ethyl acetate |
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Answer» Correct Answer - A Ethanol could not be dried by anhyrous `CaCl_(2)` because it reacts with `CaCl_(2)` as follows `CaCl_(2)+4C_(2)H_(5)OH rarr underset("Solid")(CaCl_(2).4C_(2)H_(5)OH)` |
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| 357. |
Aralkyl alcohols are also named asA. allylic alcoholB. vinylic alcoholC. benzylic alcoholD. aryl alcohol |
| Answer» Correct Answer - C | |
| 358. |
`KMnO_4` acts as oxidising agent inA. acidic mediumB. neutral mediumC. alkaline mediumD. all of the above |
| Answer» Correct Answer - D | |
| 359. |
Which of the following gives ketone on oxidation?A. `(CH_(3))_(3)COH`B. `CH_(3)CH_(2)CH_(2)OH`C. `(CH_(3))_(2)CHCH_(2)OH`D. `CH_(3)CHOHCH_(3)` |
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Answer» Correct Answer - D `CH_(3)-underset(OH)underset(|)(CH)CH_(3) overset([O])rarrCH_(3)-underset(O)underset(||)(C)-CH_(3)` |
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| 360. |
Conc. `H_(2)SO_(4)` heated with excess of `C_(2)H_(5)OH` at `1406^(@)C` to formA. `CH_(3)CH_(2)-O-CH_(3)`B. `CH_(3)CH_(2)-O-CH_(2)CH_(3)`C. `CH_(3)CH_(2)-O-CH_(2)-CH_(2)-CH_(3)`D. `CH_(2)=CH_(2)` |
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Answer» Correct Answer - C `CH_(3)CH_(2)-OH+HO-CH_(2)-CH_(3)overset("Conc. "H_(2)SO_(4))underset(140^(@)C)rarrunderset("Diethyl ether")(CH_(3)CH_(2)-O-CH_(2)-CH_(3)+CH_(2)0` |
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| 361. |
Isopropy`1` alochols heated at `300^(@)C` with copper catayst to formA. acetoneB. diMethyl etherC. acetaldehydeD. ethane |
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Answer» Correct Answer - A Secondary alcohol on dehydrogenation gives avetone. `CH_(3)-underset(OH)underset(|)(CH)-CH_(3)overset(Cu)underset(300^(@)C)rarrCH_(3)-underset(O)underset(||)(C)-CH_(3)+H_(2)` |
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| 362. |
On oxidation of alcohol gives an acid having the same number of carbon atoms. The alcohol is,A. `1^@` alcoholB. `2^@` alcoholC. `3^@` alcoholD. not necessary |
| Answer» Correct Answer - A | |
| 363. |
Which of the following is not true in case of reaction with heated copper at `300^(@)C` ?A. Phenol `to` Benzyl alcoholB. Secondary alcohol `to` KetoneC. Primary alcohol `to` AldehydeD. Tertiary alcohol `to` Olefin . |
| Answer» Correct Answer - A | |
| 364. |
When tertiary butyl alcohol is passed over reduced copper, the reaction taking placed isA. Secondary butyl alcohol is formedB. 2-Methylpropene is formedC. 1-Butene is formed .D. Butanal is formed . |
| Answer» Correct Answer - B | |
| 365. |
Boiling point of `CH_(3)CH_(2)OH(351 K)` is much higher than that of isomeric ether `(CH_(3))_(2)O(248K)`. This indicatesA. hydrogen bonds are much stronger intermolecular attractions than dipole-dipole attractionsB. dipole-dipole attractions are much stronger than hydrogen bondsC. `(CH_(3))_(2)O` has two hydrophobic groups while `CH_(3)CH_(2)OH` has oneD. `(CH_(3))_(2)O` has two hydrophilic groups while `CH_(3)CH_(2)OH` has one |
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Answer» Correct Answer - A There is no H-bonding in ether. Since, H-bonding have much stronger interaction than dipole-dipole attractions. |
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| 366. |
Boiling point of ethanol is greater than isomeric ether is due toA. hydrogen bonds are much stronger than dipole-dipole altractionB. dipole-dipole attraction is much stronger than hydrogen bondC. ether has two hydrophobic group while alcohol has oneD. ether has two hydrophilic group while alcohol has one |
| Answer» Correct Answer - A | |
| 367. |
Write IUPAC names of the following compounds: (i) `CH_(3)-underset(CH_(3))underset("| ")("C ")H-underset(OH)underset("| ")("C ")H-overset(CH_(3))overset("| ")underset(CH_(3))underset("| ")("C ")-CH_(3)` (ii) `H_(3)-underset(OH)underset("| ")("C ")H-CH_(2)-underset(OH)underset("| ")("C ")H-underset(C_(2)H_(5))underset("| ")("C ")-CH_(2)-CH_(3)` (iii) `CH_(3)-underset(OH)underset("| ")("C ")H-underset(OH)underset("| ")("C ")H-CH_(3)` (iv) `HO-CH_(2)-underset(OH)underset("| ")("C ")H-CH_(2)-OH` (ix) `CH_(3)-O-CH_(2)-underset(CH_(3))underset("| ")("C ")H-CH_(3)` (x) C_(6)H_(5)-O-C_(2)H_(5)` (xi) `C_(6)H_(5)-O-C_(7)H_(15)(n-)` (xii) `CH_(3)-CH_(2)-O-underset(CH_(3))underset("| ")("C ")H-CH_(2)-CH_(3)` |
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Answer» (i) 2,2,4-Trimethylpentan-3-ol (ii) 5-Ethylheptane-2,4-diol (iii) Butane-2,3-diol (iv) Propane-1,2,3-triol (v) 2-Methylphenol (vi) 4-Methylphenol (vii) 2,5-Dimethylphenol (viii) 2,6-Dimethylphenol (ix) 1-Methoxy-2-methylpropane (x) Ethoxybenzene (xi) 1-Phenoxyheptane (xii) 2-Ethoxybutane |
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| 368. |
Statement I Solubility of n-alcohol in water decreases with increase in molecular weight. Statement II The relative proportion of the hydrocarbon part in alcohols increases with increasing molecular weight which permit enhanced hydrogen with water.A. If both (A) and (R ) are correct and (R ) is correct explanation of (A ).B. If both (A ) and (R ) are correct but (R ) is not correct explanation of (A ).C. If (A) is correct but (R ) is incorrectD. If (A) is incorrect but (R ) is correct. |
| Answer» Correct Answer - C | |
| 369. |
Solubility of alcohol in water is due toA. hydrophobic R-groupB. hydrophillic OH-groupC. hydrophobic OH-groupD. hydrophilic R-group |
| Answer» Correct Answer - B | |
| 370. |
The solubility of a gas in water depends uponA. acidic natureB. basic natureC. neutral natureD. tendency to form hydrogen bonding |
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Answer» Correct Answer - D Solubility of alcohols depends upon tendency to form hydrogen bond with water. More the tendency to form hydrogen bond with water more the solubility . In isomeric alcohols, tendency to form hydrogen bond with water is `3^@ gt 2^@ gt 1^@` |
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| 371. |
In above reaction A and B respectivelyA. `H_2//Pt,LiAlH_4 // H_2O`B. `H_2 // Pt , H_2 //Pt`C. `LiAlH_4 // H_2O , LiAlH_4 // H_2O`D. `LiAlH_4 // H_2O, H_2//Pt` |
| Answer» Correct Answer - D | |
| 372. |
Which of the following are isomers?A. Methyl alcohol and diMethyl etherB. Ethyl aclohol and diMethyl etherC. Acetone and acetaldehydeD. Propinoic acid and propanone |
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Answer» Correct Answer - B `C_(2)H_(5)OH` and `CH_(3)-O-CH_(3)` are isomers. |
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| 373. |
Isobutyl alcohol can not be obtained by the reaction between A. 1,2,3B. 1,2,4C. 1,3,4D. 2,3,4 |
| Answer» Correct Answer - B | |
| 374. |
Alcohols acts as `:`A. oxidising agentB. reducing agentC. Lewis baseD. Bronsted acid |
| Answer» Correct Answer - C::D | |
| 375. |
Isobutyl alcohol cannot be obtained by the reaction between `:`A. `C_(2)H_(5)MgBr` and `CH_(3)CHO`B. `CH_(3)MgBr` and `CH_(3)CH_(2)CHO`C. `(CH_(3))_(2)CHMgBr` and `HCHO`D. `CH_(3)MgBr` and `CH_(3)COCH_(3)` |
| Answer» Correct Answer - A,B,D | |
| 376. |
Ethers are isomeric withA. aldehydesB. alcoholsC. acidsD. ketones |
| Answer» Correct Answer - B | |
| 377. |
In glycerine,A. one `1^@` OH group is presentB. one `2^@` OH group is presentC. two `2^@` OH groups are presentD. one `3^@` OH group is present |
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Answer» Correct Answer - B `HOCH_2overset(***)CH(OH)CH_2OH` is a glycerine `***` mark carbon atom is secondary carbon atom |
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| 378. |
The compound is not isomeric with diethyl etherA. butan-1-olB. propan-2-olC. 2-methyl -2-propanolD. butan-2-ol |
| Answer» Correct Answer - B | |
| 379. |
The compound which is not isomeric with diethyl ether isA. butan-1-olB. 2-methyl propan-2-olC. butanoneD. n-propyl methyl ether |
| Answer» Correct Answer - C | |
| 380. |
A temperature of `-110^@`C can be obtained by using ,A. ether and `CO_2`B. ether and solid `CO_2`C. acetone and `CO_2`D. acetone and solid `CO_2` |
| Answer» Correct Answer - B | |
| 381. |
The compound which is not isomeric with diethyl ether isA. n-propyl methyl etherB. butan-1-olC. 2-methylpropan-2-olD. butanone |
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Answer» Correct Answer - D Ethers and alcohol are isomeric compounds. Molecular formula for diethyl ether and butanone are respectively `C_4H_10O` and `C_4H_8O`. Hence, butanone, a ketone, cannot be isomeric with ether. |
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| 382. |
Ethers are mainly used as,A. solventB. cooling agentC. anaestheticD. substitute of petrol |
| Answer» Correct Answer - A | |
| 383. |
The correct increasing order of acidic strength isA. `CH_3 OH gt H_2O gt (CH_3)_2 CHOH`B. `H_2O gt CH_3OH gt (CH_3)_2CHOH`C. `(CH_3)_2 CH OH gt CH_3OH gt H_2O`D. `H_2O gt (CH_3)_2CH OH gt CH_3OH` |
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Answer» Correct Answer - B Water is more acidic than alcohols because of minimum positive inductive effect of hydrogen atom. `R-O^(+) H_2 overset(Cl^-)to RCl + H_2O ` |
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| 384. |
The major product of the following reaction is `:` A. a hemiacetalB. an acetalC. an etherD. an ester |
| Answer» Correct Answer - B | |
| 385. |
Molecular formula `C_2H_6O` representsA. alcohols and acidsB. alcohols and ethersC. only alcoholsD. only ethers |
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Answer» Correct Answer - B Molecular formula `C_2H_6O` are ethers and alcohols. i) `C_2H_5OH`, ii) `CH_3OCH_3` |
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| 386. |
Find the product of the given reaction ? A. B. C. D. |
| Answer» Correct Answer - A | |
| 387. |
Oxidation of 2-pentanone mainly producesA. butyric acid and `CO_2+H_2O`B. acetic acid and propionic acidC. propionic acid+ `CO_2+ H2O`D. acetic acid and butyric acid |
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Answer» Correct Answer - B Major mode of C-C bond fission is according to Popoffs rule |
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| 388. |
Select incorrect statement about hydroboration-oxidation :A. Addition is against Markownikoff ruleB. Intermediate is a carbocationC. It does not involve rearrangementD. It is a addition reaction |
| Answer» Correct Answer - B | |
| 389. |
Acetone is treated with excess of ethanol in the presence of hydrochloric acid. The product obtained isA. `CH_(3)CH_(2)CH_(2)-overset(O)overset(||)(C)-CH_(3)`B. `CH_(3)CH_(2)CH_(2)-overset(O)overset(||)(C)-CH_(2)CH_(2)CH_(3)`C. D. |
| Answer» Correct Answer - D | |
| 390. |
`C_5H_10O` representsA. aldehydesB. ketonesC. alcoholsD. acids |
| Answer» Correct Answer - C | |
| 391. |
In ethers, the `C-O-C` bond angle isA. `110^(@)`B. `105^(@)`C. `180^(@)`D. `120^(@)` |
| Answer» Correct Answer - A | |
| 392. |
The correct order of ease of cleavage of ether linkage by hydrogen halide follows `:`A. HI gtHBr gtHClB. HBrgt HI gtHClC. HCl gtHBrgtHID. HClgt HIgtHBr |
| Answer» Correct Answer - A | |
| 393. |
Diethyl ether does not react with `:`A. sulphuric acidB. hydrochloric acidC. hydroiodic acidD. acetic acid |
| Answer» Correct Answer - D | |
| 394. |
Acetic acid and n-propyl alcohols has same molecular mass (60). Out of these two, which have higher B.P.A. Acetic acidB. n-propyl alcoholC. eitherD. neither |
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Answer» Correct Answer - A Acetic acid exist as cyclic dimer due to intermolecular hydrogen bonding which requires high energy than hydrogen bonding present in alcohols. |
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| 395. |
Identity (Z) in the following series of reaction. A. B. C. D. |
| Answer» Correct Answer - A | |
| 396. |
In ethers, the `C-O-C` bond angle isA. `180^(@)`B. `90^(@)`C. `110^(@)`D. `160^(@)` |
| Answer» Correct Answer - C | |
| 397. |
Which of the following alcohol is least soluble in water ?A. `CH_3OH`B. `C_3H_7OH`C. `C_6H_13OH`D. `C_10H_21OH` |
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Answer» Correct Answer - D Solubility depends upon molecular weight. Solubility decreases with molecular weight. |
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| 398. |
Which of the following reacts less easily with sodium metal ?A. t-butyl alcoholB. isopropyl alcoholC. methyl alcoholD. ethyl alcohol |
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Answer» Correct Answer - A Due to the three methyl groups which are electron donating, the carbon atom bearing OH group acquires partial negative charge, with the result it pushes the electron pair to the O-H bond towards hydrogen and thus, hydrogen atom is firmly attached with the oxygen atom, hence it does not replace easily by sodium metal. |
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| 399. |
Which one of the following will yield propan-2-ol, choose the right answer from a to d ? A. 3, 4B. 2, 3C. 1, 3D. 1, 2 |
| Answer» Correct Answer - D | |
| 400. |
When `C_2H_5MgI` react with acetone and the addition product is hydrolysed we getA. `1^@` alcoholB. `2^@` alcoholC. `3^@` alcoholD. an aldehyde |
| Answer» Correct Answer - C | |