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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.
| 301. |
Match the column I with column II and mark the appropriate choice A. (A) `rarr` (i), (B) `rarr` (iii), (C) `rarr` (ii), (D) `rarr` (iv)B. (A) `rarr` (ii), (B) `rarr` (iii), (C) `rarr` (iv), (D) `rarr`C. (A) `rarr` (iv), (B) `rarr` (i), (C) `rarr` (ii), (D) `rarr` (iii)D. (A) `rarr` (iv), (B) `rarr` (ii), (C) `rarr` (iii), (D) `rarr` |
| Answer» Correct Answer - C | |
| 302. |
Iodoform reaction is answered by all, exceptA. `CH_(3)-underset(OH)underset("| ")"CH"-CH_(2)-COOH`B. `CH_(3)CHO`C. `CH_(3)-CH_(2)-OH`D. `CH_(3)-CH_(2)-CH_(2)OH` |
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Answer» Correct Answer - D The compounds which can give iodoform reaction, must contain either one of the following groups `{:(CH_(3)-underset(O)underset(||)C-,CH_(3)-underset(OH)underset("| ")"CH"-),(CH_(3)-underset(Cl)underset(|)CH-,CX_(3)-underset(O)underset(||)C-),(CHX_(2)-underset(O)underset(||)C-,CH_(2)X-underset(O)underset(||)C-):}` Hence, among the given from only (d) give iodoform test. |
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| 303. |
Which of the following does not give iodoform test?A. `C_(2)H_(5)OH`B. `C_(6)H_(5)OH`C. `(CH_(3))_(2)CHOH`D. All of these |
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Answer» Correct Answer - B Compounds containing either `CH_(3)overset(|)CHOH or CH_(3)-overset(O)overset(|)C-` group, when react with `NaOH` and `I_(2)`, form yellow coloured iodoform. This test is called iodoform test. `C_(6)H_(5)OH` does not contains `CH_(3)underset(OH)underset("| ")"CH"-` group, thus it does not give iodoform test. |
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| 304. |
How many of the following glycols is virtually inert to periodate oxidation which glycol is inert ? Explain |
| Answer» Option (2) and (3) will react with periodic dut to formation of favourable conformer | |
| 305. |
Mark the correct order of decresing acid strenght of the following compunds. A. `(v) gt (iv) gt (ii) gt (i) gt (iii)`B. `(ii) gt (iv) gt (i) gt (iii) gt (v) `C. `(iv) gt (v) gt (iii) gt (ii) gt (i) `D. `(v) gt (iv) gt (iii) gt (ii) gt (i)` |
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Answer» Correct Answer - B The electron withdrawing group `(-NO_2)` increases the acidity of phenols and the electron donation grop `(-OCH_3)` decreases the acidity of phenols. The effect at P-position is greater than at m-position. |
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| 306. |
Which one of the following is not expected to undergo iodoform reaction?A. Propan-2-olB. 1-phenylethanolC. 2-butanolD. Diphenyl methanol |
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Answer» Correct Answer - D Diphenyl methanol does not contain `-COCH_(3)` group thus, does not undergo iodoform reaction. |
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| 307. |
Which of the following compunds undergo periodate oxidation ?A. B. C. D. all of the above |
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Answer» Correct Answer - D [Hint] All these compunds have `[-underset(|)overset(OH)overset(|)(C)-underset(|)overset(OH)overset(|)(C)-]` glycolic groups, hence, they ar oxidised by periodic acid `(HIO_(4))` |
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| 308. |
Absolute alcohol cannot be obtained by simple fractionsal distillation because `:`A. pure `C_(2)H_(5)OH` is unstableB. `C_(2)H_(5)OH` forms hydrogen bonding with waterC. boiling point `C_(2)H_(5)OH` is very close to that of waterD. constant boiling azeotropic mixture is formed with water |
| Answer» Correct Answer - D | |
| 309. |
The mixture of ethanol and water cannot be separated by distillation becauseA. They form a constant boiling mixtureB. Alcohol molecules are solvatedC. Their boiling points are very nearD. Alcohol remains dissolved in water |
| Answer» Correct Answer - A | |
| 310. |
What are the products of the following reaction? A. `Br-C_(6)H_(4)-OCH_(2)CH_(2)-Br`B. `Ph-Br+Br -CH_(2)CH_(2)-OH`C. `Ph -Br +Br -CH_(2)CH_(2)-Br`D. `Ph -OH +CH_(3)-CHBr_(2)` |
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Answer» Correct Answer - D `Ph-O-CH_(2)-CH_(2)-OH overset(H)underset(-H_(2)O)rarr Ph-O-CH_(2)underset(CH_(2))o+` `rarr Ph-O-overset(+)(CH)-CH_(3) overset(o+)overset(Br)rarrPh-O-overset(CH_(3))overset(|)underset(Br)underset(|)(CH)` `overset(HBr)underset(S_(N)I)rarrPh-OH+Br-underset(Br)underset(|)(CH)-CH_(3)` |
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| 311. |
Methanol and ethanol are miscible in water due toA. dissociation in waterB. their acidic natureC. hydrogen bond with waterD. alkyl groups |
| Answer» Correct Answer - C | |
| 312. |
Which of the following is industrially prepared by passing ethylene into hypochlorous acid?A. EthaneB. Ethylene oxideC. Ethylene dinitrateD. Ethylene glycol |
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Answer» Correct Answer - D `underset("Ethyl ene")(H_(2)C=CH_(2))+underset("hypochlorous")(HOCI)rarrunderset("Ethyl ene chlorohydrine")underset(CI)underset(|)(H_(2)C-CH_(2)OH)` `overset([NaHCO_(3)])rarrunderset(("Ethyl eneglycol"))underset(OHOH)underset(| |)(H_(2)C-CH_(2))+NaCI+CO_(2)` |
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| 313. |
Ethyl alcohol on oxidation with `K_2Cr_2O_7` givesA. acetic acidB. acetaldehydeC. formaldehydeD. formic acid |
| Answer» Correct Answer - A | |
| 314. |
The mixture of ethanol and `H_2SO_4` is distilled in distillation flask at `140^@C`. The flask would then containA. `H_2SO_4` and `C_2H_5-O-C_2H_5` onlyB. `H_2O, H_2SO_4` and `C_2H_5OSO_3H` onlyC. `H_2O , C_2H_5OSO_3H, C_2H_5`D. `C_2H_5-O-C_2H_5, C_2H_5OSO_3H, H_2SO_4` and `H_2O` |
| Answer» Correct Answer - D | |
| 315. |
Equimolar quantities of ethanol and methanol are heated with conc. `H_(2)SO_(4)`. The product formed isA. `C_(2)H_(5)OC_(2)H_(5)`B. `CH_(3)OCH_(3)`C. `C_(2)H_(5)OCH_(3)`D. all the these |
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Answer» Correct Answer - D `3R^(1)-OH +3R^(2)-OH overset(H_(2)SO_(4))underset(Delta)rarr R^(1)-O-R^(2)+R^(2)-O-R^(2)+R^(1)-O-R^(1) +3H_(2)O` |
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| 316. |
Which of the following are ismoers?A. Methyl alcohol and diMethyl etherB. Acetone and acetaldehydeC. Ethylalcohol and diMethyletherD. Propionice acid and propanone |
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Answer» Correct Answer - C `C_(2)H_(5)OH`and`CH_(3)-O-CH_(3)`are isomers. |
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| 317. |
Ethanol is prepared industrially byA. Hydration of ethyleneB. Fermentation of sugarsC. Both the aboveD. None of these |
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Answer» Correct Answer - C Hydration of alkenes `CH_(2)=CH_(2)+overset(+)HHSoverset(-)O_(4)rarrCH_(3)-CH_(2)-HSO_(4)` `CH_(3)-CH_(2)HSO_(4)underset(Boil)overset(H_(2)O)rarrCH_(3)-CH_(2)-OH-H_(2)SO_(4)` Fermentation of sugars: `C_(12)H_(22)O_(11)+H_(2)overset("Invertase")rarrunderset("Glucose")(C_(6)H_(12)O_(6))+underset("Fructose")(C_(6)H_(12)O_(6))` `underset("Glucose of Fructose")(C_(6)H_(12)O_(6))overset("Zymase")rarr2C_(2)H_(5)OH+2CO_(2)` |
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| 318. |
`C_(6)H_(5)-CH=CHCHO overset((X))rarr C_(6)H_(5)CH=CH_(2)OH` In the above sequence (X) can be:A. `N_(2)//Ni`B. `K_(2)Cr_(2)O_(7)//H^(+)`C. `NaBH_(4)`D. Both`(a)`and`(c )` |
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Answer» Correct Answer - C `NaBH_(4)`and `LiAH_(4)`attack only carbony`1` group and reduce it into alcohol group. They do not attack on double bond. `underset("cinnamic aldehyde")(C_(6)H_(5)-CH=CHCHO) overset(NaBH_(4))rarr underset("cinnamic alcohol")(C_(6)H_(5)-CH=CH.CH_(2)OH)` Whereas `H_(2)//Ni` affects double bond and `K_(2)Cr_(2)O_(7)//H^(+)`carries oxidation. |
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| 319. |
On heating ethanol with excess of conc. `H_2SO_4` at 443 K, product obtained isA. etheneB. ethaneC. ethyneD. ethoxy ethane |
| Answer» Correct Answer - A | |
| 320. |
An equimolarr quantities of ethanol and propanol are heated with conc. `H_(2)SO_(4)`. The product /s formed is /are `:`A. `C_(2)H_(5)O C_(2) H_(5)`B. `C_(3)H_(7)O C_(3)H_7`C. `C_(2)H_(5)OC_(3)H_7`D. All of these |
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Answer» Correct Answer - D `C_2H_5OH+CH_3CH_2CH_2OHoverset((conc.H_2SO_4))underset(Delta)rarrC_2H_5OC_2H_5+C_3H_7OC_3H_7+C_2H_5OC_3H_7` |
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| 321. |
The product obtained on heating ethanol with conc. `H_(2)SO_(4)` at `165^(@)-170^(@)C`, isA. `(C_(2)H_(5))_(2)SO_(4)`B. `CH_(3)COOH`C. `CH_(2)=CH_(2)`D. `C_(2)H_(5)HSO_(4)` |
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Answer» Correct Answer - C `C_(2)H_(5)Ohoverset("Conc. "H_(2)SO_(4))underset(170^(@)C)rarr underset("Ethylene")(CH_(2)=CH_(2))+H_(2)O` |
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| 322. |
Asseriton: Methanol is stronger acid than water. Reason: All alcohols are stronger acod than water.A. If both assertion and reason are true and the reason is the correct explanantion of the assertion.B. If both assertion and reason are true but reason is not the correct explanantion of the asseriton.C. If assertion is true but reason is false.D. If assertion if false but reason is ture. |
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Answer» Correct Answer - C `CH_(3)OH` is stronger acid than water and rest all aclohols are weaker acids. |
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| 323. |
Assertion: The relative ease of dehydration of alcohols following order: Tretiary `gt ` secondary `gt` Primary Reason : Formation of carbocation is the slowest step of reaction.A. if both assertioon and reason are true and reason is the corrct explanation of assertion.B. If both assertion and reason are ture but reason is not the corrcet explanation of assertion.C. If assertion is true but reason is false .D. if both assertion and reason are false. |
| Answer» Correct Answer - A | |
| 324. |
Assertion: Alcohols give only substitution products with `HX` and not elimination product. Reason: `X^(-)` is a very weak base which cannot abstract proton from alcohol.A. If both assertion and reason are true and the reason is the correct explanantion of the assertion.B. If both assertion and reason are true but reason is not the correct explanantion of the asseriton.C. If assertion is true but reason is false.D. If assertion if false but reason is ture. |
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Answer» Correct Answer - A If both assertion and reason are true and the reason is the correct explanantion of the asseriton. |
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| 325. |
In this reaction , `(CH_(3))_(3) C - CH_(2)OH overset("Conc." H_(2)SO_(4))underset(170^(@)C)(to) X` X isA. `(CH_3)_2C=CHCH_3`B. `CH_3-=CH`C. `(CH_3)_2CHCH_2CH_3`D. `CH_3-CH_2-underset(CH_3)underset(|)C=CH_2` |
| Answer» Correct Answer - A | |
| 326. |
Assertion: Acid cataysed dehydration of `t`-butanol is faster than `n`-butanol. Reason: The order of stability of carbocation is `3^(@) gt 2^(@) gt 1^(@)`.A. If both assertion and reason are true and the reason is the correct explanantion of the assertion.B. If both assertion and reason are true but reason is not the correct explanantion of the asseriton.C. If assertion is true but reason is false.D. If assertion if false but reason is ture. |
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Answer» Correct Answer - A If both assertion and reason are true and the reaosn is the correct explanantion of the asseriton. |
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| 327. |
2-butanol on dehydration mainly gives,A. `CH_3CH_2CH=CH_2`B. `CH_3CH=CHCH_3`C. `(CH_3)_2C=CH_2`D. `CH_3CH=CH_2` |
| Answer» Correct Answer - B | |
| 328. |
Acid catalysed dehydration of t-butanol is faster than that of n-butanol becauseA. tertiary carbocation is more stable than primary carbocationB. primary carbocation is more stable than tertiary carbocationC. t-butanol has a higher boiling pointD. rearrangement takes place during dehydration of t-butanol. |
| Answer» Correct Answer - A | |
| 329. |
What is an antifreeze?A. GlycolB. EthylalcoholC. WaterD. Methanol |
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Answer» Correct Answer - A Glycol is used as an antifreeze for automobile radiates because it lowers down the melting point of water. |
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| 330. |
`C(4)H_(10)O+PCl_(5)rarrR_(1)Cl+R_(2)Cl+POCl_(3)` `R_(1)Cl` gives halogrom test but `R_(2)Cl` does not, hence, the original compound of the reaction is `:`A. ethoxyethaneB. 1-methoxypropaneC. 2-methoxypropaneD. isobutyl alcohol |
| Answer» Correct Answer - C | |
| 331. |
One mole of diethyl ether on heating with conc. HI givesA. 1 mole of `C_(2)H_(5)I` and 1 mole of `C_(2)H_(5)OH`B. 2 Moles of iodoethaneC. 2 Moles of ethanolD. Iodoethane and ethonol but not in a `1:1` mole ratio |
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Answer» Correct Answer - B |
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| 332. |
In the reaction given below, `X` is Neopentyl alcohol `overset(H_(2)SO_(4))(rarr)X`A. 2-methylpentaneB. Neo-pentaneC. 2-methylpent-2-eneD. 2-methylbut-2-ene |
| Answer» Correct Answer - D | |
| 333. |
An oxygen atom in ether is :(a) sp2 -hybridized (b) sp3 -hybridized (c) sp-hybridized (d) sp2-d-hybridized |
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Answer» Option : (b) sp3 -hybridized |
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| 334. |
Resorcinol on distillation with zinc dust gives A. Cyclohexane B. Benzene C. Toluene D. Benzene-1, 3-diol |
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Answer» Correct answer is (b) Benzene |
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| 335. |
Identify 'A' in the following reaction :C2H5 - O - C2H5 + 2HI \( \overset{hot}{\underset{-H_2O}{\longrightarrow}}\) (a) C3H8I and CH3OH(b) C4H10I(c) C2H5I(d) C2H5I and C2H5OH |
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Answer» Option : (c) C2H5I |
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| 336. |
Which of the following is known by the name epichlorohydrin?A. 3-chloropropaneB. 3-chloropropan-1-olC. 2-chloromethyloxiraneD. none of the above |
| Answer» Correct Answer - C | |
| 337. |
An example for a polydric alcohol isA. Methyl alcoholB. Neopentyl alcoholC. Sec butyl alcoholD. Mannitol |
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Answer» Correct Answer - D |
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| 338. |
Which of the following reactions will yield only propan-2-ol ?A. `CH_(2) = CH - CH_(3) + HOH overset(H^(+))rarr`B. `CH_(3) - CHO overset(CH_(3)MgBr//HOH)rarr`C. `HCHO overset(C_(2)H_(5)MI//HOH)rarr`D. `CH_(2) = CH - CH_(3) overset("Neutral" KMnO_(4))rarr` |
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Answer» Correct Answer - B |
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| 339. |
2-Methyl pentan-1-ol is aA. `1^(@)` AlcoholB. `2^(@)` alcoholC. `3^(@)` AlcoholD. enol |
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Answer» Correct Answer - A |
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| 340. |
(I) 1,2-Dihydroxy benzene (II) 1,3-Dihydroxy benzene (III) 1,4-Dihydroxy benzene (IV) Hydroxy benzene The increasing order of boiling points of the above-mentioned alcohols is:A. I `lt` II `lt` III`lt` IVB. I `lt` II `lt` IV`lt` IIIC. IV `lt` II `lt` II`lt` IIID. IV `lt` II `lt` I`lt` III |
| Answer» Correct Answer - C | |
| 341. |
The compound fromed when Ethyl bromide is heated with dry silver oxide isA. DiMethyl etherB. DiEthyl etherC. MethylalcoholD. Ethyl alcohol |
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Answer» Correct Answer - B `2C_(2)H_(5)Br + underset(Dry)(Ag_(2)O)rarrC_(2)H_(5) - O - C_(2)H_(5) +2AgBr` If we take moist `Ag_(2)O` then alochol is formed `Ag_(2)O +H_(2)O rarr 2AgOH` `C_(2)H_(5)Br +AgOH rarr C_(2)H_(5)OH +AgBr` |
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| 342. |
Assertion: Benzenediazonium chloride on boiling with water gives phenol. Reason: `C-N` bond is polar.A. If both assertion and reason are true and the reason is the correct explanantion of the assertion.B. If both assertion and reason are true but reason is not the correct explanantion of the asseriton.C. If assertion is true but reason is false.D. If assertion if false but reason is ture. |
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Answer» Correct Answer - B Correct explanantion Benzenediazonium chloride decomposes to form `C_(6)H_(5)^(+)` which upon nucleophilic attack by water followed by loss of a proton gives phenol. |
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| 343. |
Match the structures of the compounds given in Column I with the name of the compounds given in Column II. |
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Answer» Correct Answer - A. `rarr (4)` , B. `rarr (3)` , C. `rarr (6)` , D. `rarr (1)` , E. `rarr (7)` , F. `rarr (2)` A. Cresols are organic compounds which are methyl phenols. There are forms of cresol-o-cresol, p-cresol and m-cresol. B. Catechol is also known as pyrocatechol. Its IUPAC name is 1,2,-dihydrobenzene. It is used in the production of pesticides, perfumes and pharmaceuticals. C. Its IUPAC name is 1,3-dihydroxybenzene. Resorcinol is used to treat acne, seborrheic dermatitis and other skin disorder. D. Hydroquinone is also known as quinol. Its IUPAC name is 1, 4-dihyroxybenzene. It is a white granular solid. It is a good reducing agent. E. Anisole ot methoxy benzene, is a colourless liquid with a smell reminiscent of anise seed. F. Phenetole is an organic compound. It is also known as ethylphenyl ether. It is volatile in nature and its vapours are explosive in nature. |
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| 344. |
Assertion (A) Addition reaction of water to but-1-ene in acidic medium yields butan-1-ol. Reason (R) Addition of water in acidic medium proceeds through the formation of primary carbocation.A. Assertion and reason both are correct and reason is correct explanation of assertion.B. Assertion and reason both are wrong statements.C. Assertion is correct statement but reason is wrong statement.D. Assertion is wrong statement but reason is correct statement. |
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Answer» Correct Answer - b Assertion and reason both arw wrong statements. Correct Assertion Addition reactio of water to but-1-ene in acidic medium yields butan-2-ol. Correct Reason Addition of water in acidic medium proceeds through the formation of secondary carbocation. Mechanism `H_(2)O+H^(+) rarr H_(3)O^(+)` `CH_(3)-CH_(2)-CH=CH_(2)+H underset(":")overset(":")(O_(+))-H rarr H_(3)C-underset((2^(@) "carbocation"))(CH_(2)-overset(+)(CH)-CH_(3))+H_(2)O` `{:(H_(3)-CH_(2)-overset(+)(CH)-CH_(3)+H_(2)O rarr H_(3)C-CH_(2)-CH-CH_(3)),(" |"),(" "+:O-H),(" |"),(" "H):}` `H_(3)C-CH_(2)-overset(CH_(3))overset(|)(CH_(2))-underset(..)overset(H)overset(|)(O)-H+H_(2)O rarr CH_(3)-underset("Butane-2-ol")(CH_(2)-overset(OH)overset(|)(CH)-CH_(3))` |
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| 345. |
Which of the following alcohol contain vinyl groupA. B. C. D. |
| Answer» Correct Answer - C | |
| 346. |
The general molecular formula, which represents the homologous series of alkanols isA. `C_(n)H_(2n)O`B. `C_(n)H_(2n+1)O`C. `C_(n)H_(2n+2)O`D. `C_(n)H_(2n)O_(2)` |
| Answer» Correct Answer - C | |
| 347. |
`1^@`, `2^@` and `3^@` alcohols are identified byA. Lucas testB. oxidation testC. haloform testD. all of these |
| Answer» Correct Answer - D | |
| 348. |
Following alcohol on dehydration gives A. B. C. D. |
| Answer» Correct Answer - D | |
| 349. |
The characteristic grouping of secondary alcohol isA. B. `-CH_2OH`C. D. |
| Answer» Correct Answer - C | |
| 350. |
Grain spirit isA. isopropyl alcoholB. isobutyl alcoholC. methyl alcoholD. ethyl alcohol |
| Answer» Correct Answer - D | |