Explore topic-wise InterviewSolutions in .

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.

1.

The product formed on reation of ethyl alcohol with bleaching powder is .A. `CHCl_(3)`B. `C Cl_(3)CHO`C. `CH_(3)COCH_(3)`D. `CH_(3)CHO`

Answer» Correct Answer - A
2.

In the solvolysis of 3-methyl-3-bromohexane, which of the following statements is not correct?A. It involves carbocation intermediateB. The intermediate involves `sp^(2)` carbonC. Polar solvents accelerates the reactionD. It involves in version of configuration

Answer» Correct Answer - D
3.

When ethyl alcohol `(C_(2)H_(5)OH)` reacts with thionyl chloride, in the presence of pyridine, the product obtained isA. `CH_(3)CH_(2)Cl+HCl`B. `C_(2)H_(5)Cl+HCl+SO_(2)`C. `CH_(3)CH_(2)Cl+H_(2)O+SO_(2)`D. `CH_(3)COCl+HCl+SO_(2)`

Answer» Correct Answer - B
`C_(2)H_(5)OH+SOCl_(2)overset("pyridine")toC_(2)H_(5)Cl+SO_(2)+HCl`
4.

Benzylidene chloride isA. `C_(6)H_(5)CH_(2)Cl`B. `C_(6)H_(5)CHCl_(2)`C. `C_(6)H_(4)ClCH_(2)Cl`D. `C_(6)H_(5)C Cl_(3)`

Answer» Correct Answer - B
5.

Chloroform reacts with the following compound to give a hypnoticA. PhenolB. `R-NH_(2)`C. AcetoneD. `HNO_(3)`

Answer» Correct Answer - C
`underset("acetone")(CH_(3)-overset(O)overset(||)(C)-CH_(3))overset(CHCl_(3))to(CH_(3))_(2)-underset("Chloretone (Hypnotic)")(overset(OH)overset(|)(C)-C Cl_(3))`
6.

Reduction of acetyl chloride with `H_(2)` in presence of Pd givesA. `CH_(3)COCH_(3)`B. `C_(2)H_(5)OH`C. `CH_(3)COOH`D. `CH_(3)CHO`

Answer» Correct Answer - D
`CH_(3)COCl+H_(2)underset("Reduction")overset(Pd)toCH_(3)CHO+HCl`
7.

Allyl chloride on dehydrochlorination gives:A. PropadieneB. PropyleneC. AcetylchlorideD. Acetone

Answer» Correct Answer - A
8.

n-propylbromide on treatment with ethanolic potassium hydroxide producedA. PropaneB. PropeneC. PropyneD. Propanol

Answer» Correct Answer - B
`underset("n-propyl bro mide")(CH_(3)-CH_(2)-CH_(2)Br) overset("ethanolic KOH")toCH_(3)underset("propene")(-CH)=CH_(2)+KBr+H_(2)O`
9.

The reaction conditions leadint to the best yield of `C_(2)H_(5)Cl` areA. `C_(2)H_(6)("excess")+Cl_(2)overset("UV light")to`B. `C_(2)H_(6)+Cl_(2)("excess")underset("room temp")overset(dark)to`C. `C_(2)H_(6)+Cl_(2)(excess)overset("UV light")to`D. `C_(2)H_(6)+Cl_(2)overset("UV light")to`

Answer» Correct Answer - A
`C_(2)H_(6) (excess)+Cl_(2) overset("UV light")toC_(2)H_(5)Cl+HCl`
10.

Which compound does not form iodoform with alkali and iodineA. AcetoneB. EthanolC. Diethyl ketoneD. isopropyl alcohol

Answer» Correct Answer - C
`CH_(3)CH_(2)-CO-CH_(2)-CH_(3) overset(NaOH//I_(2))to` No Yellow ppt.
`{:(CH_(3)COCH_(3)overset(NaOH//I_(2))toCHI_(3)),(C_(2)H_(5)OH overset(NaOH//I_(2))toCHI_(3)),(CH_(3)-underset(OH)underset(|)(C)H-CH_(3) overset(NaOH//I_(2))toCHI_(3)):}}"yellow ppt"`
11.

On treatment with chlorine in presence of sunlight toluene gives the product .A. o-chloro tolueneB. 2,5-dichloro tolueneC. p-chloro tolueneD. Benzyl chloride

Answer» Correct Answer - D
12.

The odd decomposition of carbon chlorine bond formA. Two free ionsB. two-carbonium ionC. Two carbanionD. A cation and an anion

Answer» Correct Answer - D
`R-CH_(2)-Cl overset("Heterolytic bond fission")tounderset("cation")(RCH_(2)^(o+))+underset("anion")(Cl^(ө))`
Cl is more electronegative than `C` by which it form anion and hydrocarbon form cation.
13.

What is the product formed in the following reaction `C_(6)H_(5)OH+C Cl_(4)underset((2)" "H^(+))overset((1)" "NaOH)to`A. p-hydroxybenzoic acidB. o-hydroxybenzoic acidC. BenzaldehydeD. Salicylaldehyde

Answer» Correct Answer - B
14.

An isomer of `C_(3)H_(6)Cl_(2)` on boiling with aqueous KOH gives acetone. Hence, the isomer isA. 2,2-dichloropropaneB. 1,2-dichloropropaneC. 1,1-dichloropropaneD. 1,3-dichloropropane

Answer» Correct Answer - A
`underset("2,2-dichloropropane "("isomer of "C_(3)H_(6)Cl_(2)))(CH_(3)-underset(Cl)underset(|)overset(Cl)overset(|)(C)-CH_(3)+underset("Aqueous")(2KOH) underset(2-KCl)overset(boil)to underset("unstable")(CH_(3)-underset("Unstable")(CH_(3)-overset(O)overset(||)(C)-CH_(3))`
15.

Which conformation of `C_(6)H_(6)Cl_(6)` is most powerful insecticideA. aaeeeeB. aaaeeeC. aaaaeeD. aaaaaa

Answer» Correct Answer - B
aaaeee form is the most powerful insecticide form of `C_(6)H_(6)Cl_(6)`.
16.

On heating diethyl ether with conc. `HI,2` moles of which of the following is formedA. EthanolB. IodoformC. Ethyl iodideD. Methyl iodide

Answer» Correct Answer - C
`C_(2)H_(5)-O-C_(2)H_(5)+underset((conc.))(2HI)tounderset("Ethyl iodide")(2C_(2)H_(5)I)+H_(2)O`
17.

2-Methylpropane on monochlorination under photochemical conditions giveA. 2-chloro-2-methylpropane as major productB. (1:1) mixture of 1-chloro-2-methylpropane and 2-chloro-2-methylpropaneC. 1-chloro-2-methylpropane as a major productD. (1:9) mixture of 1-chloro-2-methylpropane and 2-chloro-2-methylpropane

Answer» Correct Answer - C
`CH-underset(CH_(3))underset(|)overset(H)overset(|)(C)-CH_(3)-underset((A))(CH_(3)-underset(CH_(3))underset(|)overset(Cl)overset(|)(C)-CH_(3))+underset((B))(CH_(3)-underset(CH_(3))underset(|)(C)H-CH_(2)-Cl`
Ratio of (A): (B) is 5:9
18.

The products of combustion of an aliphatic thiol (RSH) at 298 K areA. `CO_(2)(g),H_(2)O(g) and SO_(2)(g)`B. `CO_(2)(g),H_(2)O(l) and SO_(2)(g)`C. `CO_(2)l,H_(2)O(l) and SO_(2)(g)`D. `CO_(2)(g),H_(2)O(l) and SO_(2)(l)`

Answer» Correct Answer - B
On combustion of RSH (aliphatic and aromatic thio alcohol) at 298 K, `CO_(2)(g),H_(2)O(l) and SO_(2)(g)` are obtained.
19.

During debromination of meso-dibromobutane, the major compound formed is :A. n-butaneB. 1-buteneC. cis-2-buteneD. trans-2-butene

Answer» Correct Answer - D
Debromination is a trans-elimination gives trans-2-butene.
20.

In `CH_(3)CH_(2)Br,%` of Br isA. 80B. 75C. 70D. 7

Answer» Correct Answer - B
% of Br`=("Mass of Br")/("Mass of organic compound")xx100`
`=(80)/(109)xx100=73.39%` or approx. 75%
21.

The correct increasing order of the reactivity of halides for `S_(N^(1))` reaction is:A. `CH_(3)-CH_(3)-X lt (CH_(3))_(2)CH-XltCH_(2)=CH-CH_(2)-XltPhCH_(2)-X`B. `(CH_(3))_(2)CH-XltCH_(3)-CH_(2)-XltCH_(2)=CH-CH_(2)XltPhCH_(2)-X`C. `PhCH_(2)-Xlt(CH_(3))_(2)CH-XltCH_(3)-CH_(2)-XltCH_(2)=CH-CH_(2)-X`D. `CH_(2)=CH-CH_(2)-XltPh-CH_(2)-Xlt(CH_(3))_(2)CH-XltCH_(3)-CH_(2)-X`

Answer» Correct Answer - A
As per carbocation,
stability`toROH+CH_(2)=CH_(2)+Br`
22.

Amont the following the most reactive towards alcoholic KOH isA. `CH_(2)=CHBr`B. `CH_(3)COCH_(2)CH_(2)Br`C. `CH_(3)CH_(2)Br`D. `CH_(3)CH_(2)CH_(2)Br`

Answer» Correct Answer - B
A Elimination of `Br^(-)` become easier due to the presence of carbonyl group.
23.

In the following sequence of reactions: `CH_(3)-Br overset(KCN)rarr A overset(H_(3)overset(+)(O))rarr B overset(LiAlH_(4))rarr C` the end product (C ) is :A. AcetoneB. MethaneC. AcetaldehydeD. Ethyl alcohol

Answer» Correct Answer - D
`CH_(3)-Br overset(KCn)tounderset((A))(CH_(3)-CN)overset(H_(3)O^(+))to underset((B))(CH_(3)-COOH)overset(LiAlH_(4))to underset("Ethyalcohol")underset((C))(CH_(3)-CH_(2)-OH)`
24.

Alcoholic solution of KOH is used for ,A. DehydrationB. DehydrogenationC. DehydrohalogenationD. Dehalogenation

Answer» Correct Answer - C
`CH_(3)-CH_(2)-Br+underset((alc))(KOH)overset("dehydrohalogenation")toCH_(2)=CH_(2)+HBr+H_(2)O`
In alcoholic KOH alkoxide ions `(RO^(-))` are present which is a strong base. They abstract proton from `beta`-carbon of alkyl halide and favours elimination reaction.
`ROH+KOHtounderset("ptassium alkoxide")(ROK)+H_(2)`
`RO^(-)+H-overset(beta)(C)H_(2)-overset(alpha)(C)H_(2)-Br`
25.

Identify Z in the following series: ` C_(2) H_(5) I underset("KOH")overset("Alcoholic")(rarr) " X " overset(Br_(2))(rarr) " Y " overset("KCN")(rarr) Z `A. `CH_(3)CH_(2)CN`B. `{:(,CH_(2)CN),(,"|"),(,CH_(2)CN):}`C. `BrCH_(2)-CH_(2)CN`D. `BrCH=CHCN`

Answer» Correct Answer - B
`C_(2)H_(5)Ioverset(alc.KOH)toC_(2)H_(4)overset(Br_(2))tounderset(Br)underset(|)(C)H_(2)-underset(Br)underset(|)(C)H_(2)overset(KCN)tounderset("Butane-1,4-dinitrile")(underset(CN)underset(|)(C)H_(2)-underset(CN)underset(|)(C)H_(2))`
26.

Velocity of the `S_(N^(2))` reaction depends on the concentration of the substrate as well as te nucleophile. The reaction is favoured by strong `Nu^(overset(..)(ө))`, and in the presence of polar aprotic solvent, optically active halides give walden inversion by `S_(N^(2))` mechanism. the presence of hetro group (atom as `beta-C` atom, unsaturation at `beta-C`, and `(-overset(O)overset(||)(C)-)` Allyl halides also give `S_(N^(2))` mechanism. EDG at ortho-and para-positions in benzyl halides favours `S_(N^(1))` mechanism, whereas EWG favours `S_(N^(2))` mechanism. Q. In the reeaction , [X] isA. `C_(2)H_(5)Br`B. C. D. `CH_(2)=CH_(2)`

Answer» Correct Answer - C
Neighbrouring group participation of `(COO^(ө))` group, with retention of configuration.
27.

How many monochloro derivatives are possible when 3-methylheptane is subjected to free radical chlorination

Answer» Correct Answer - 8
`overset(1)(C)H_(3)-overset(2)(C)H_(2)overset(3)(-)overset(overset(8)(C)H_(3))overset(|)(C)H-overset(4)(C)H_(2)-overset(5)(C)H_(2)-overset(6)(C)H_(2)-overset(7)(C)H_(3)`
All the carbon atoms are different and hence eight monochloro derivatives are possible.
28.

Assertion: `C Cl_(4)` is not a fire extinguisher. Reason: `C Cl_(4)` is insoluble in water.A. If both Assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. if assertion is true but reason is false.D. If assertion is false but reason is true

Answer» Correct Answer - D
`C Cl_(4)` is used as a fire extinguisher. Its dense, non-combustible vapours cover the burning substance and prevents the availability of oxygen around burning material.
29.

In fire extinguisher, pyrene isA. `CO_(2)`B. `C Cl_(4)` is non-inflammableC. `CS_(2)`D. `CHCl_(3)`

Answer» Correct Answer - B
`C Cl_(4)` is stable to red heat. Its vapours are highly non-inflammable i.e., do not catch fire. It is because of this property a fire extinguisher is restricted because with water vapours, it forms highly poisonous phosgene gas.
`C Cl_(4)+H_(2)O to underset("Phosgene")(COCl_(2))+2HCl`
30.

`C Cl_(4)` is a well known fire extinguisher. However after using it to extinguish fire the room should be well ventilated. This is because:A. it is flammable at higher temperatureB. It is toxicC. It produces phosgene by reaction with water vapour at higher temperatureD. It is corrosive

Answer» Correct Answer - C
Carbon tetrachloride vapours react with steam above `500^(@)C` to form phosgene, a poisonous gas.
`C Cl_(4)+H_(2)O overset(500^(@)C)to underset("phosgene")(COCl_(2))+2HCl`
The dense vapours forms a protective layer on the burning objects and prevent the oxygen or air to come in contact with the burning object.
31.

Alkyl halides are less soluble in water becauseA. They ionise in waterB. They do not form H- bonds with waterC. They are highly viscousD. They have very strong C-X bond

Answer» Correct Answer - B
They are polar but fail to form H-bonds with water.
32.

Identify the set of reagents/reaction conditions X ad Y in the following set of tranformation `CH_(3)-CH_(2)-CH_(2)Broverset(X)to"Product"overset(Y)toCH_(3)-underset(Br)underset(|)(C)H-CH_(3)`A. X=dilute aqueous NaOH, `20^(@)C,Y=HBr//`acetic acid, `20^(@)C`B. X=concentrated alcoholic NaOH, `80^(@)C,Y=HBr`/acetic acid, `20^(@)C`C. X=dilute aqueous NaoH, `20^(@)C,Y=Br_(2)//CHCl_(3),0^(@)C`D. X=concentrated alcoholic NaoH, `80^(@)C` `Y=Br_(2)//CHCl_(3),0^(@)C`

Answer» Correct Answer - B
`CH_(3)-CH_(2)-CH_(2)Br underset(80^(@)(X))overset(alc." "NaOH)toCH_(3)-CH=CH_(2)underset("in "CH_(3)COOH,20^(@)C(Y))toCH_(3)-underset(Br)underset(|)(C)H-CH_(3)`.
33.

Identify X and Y in the following sequence `C_(2)H_(5)Broverset(X)to`product`overset(Y)toC_(3)H_(7)NH_(2)`A. `X=KCN,Y=LiAlH_(4)`B. `X=KCN,Y=H_(3)O^(+)`C. `X=CH_(3)Cl,Y=AlCl_(3)HCl`D. `X=CH_(3)NH_(2),Y=HNO_(2)`

Answer» Correct Answer - A
`C_(2)H_(5)Br overset(KCN(X))toC_(2)H_(5)CN overset(LiAlH_(4)(Y))toC_(2)H_(5)CH_(2)NH_(2)(C_(3)H_(7)NH_(2))`
X=KCN, Y=`LiAlH_(4)`
34.

C-Cl bond of chlorobenzene in comparison to C-Cl bond of methyl chloride isA. Longer and weakerB. Shorter and weakerC. Shorter and strongerD. Longer and stronger

Answer» Correct Answer - C
In chlorobenzene `C-Cl` bond acquires partial double bond character because of resonance.
35.

The correct order of C-X bond polarity isA. `CH_(3)Br gtCH_(3)ClgtCH_(3)I`B. `CH_(3)IgtCH_(3)BrgtCH_(3)Cl`C. `CH_(3)Cl gtCH_(3)Br gt CH_(3)I`D. `CH_(3)Cl gt CH_(3)I gt CH_(3)Br`

Answer» Correct Answer - C
The C-X bond polarity order are as under
`CH_(3)Cl gt CH_(3)Br gt CH_(3)I`
36.

Reaction of `t-butyl` bromide with sodium methoxide producesA. IsobutaneB. IsobutyleneC. Sodium t-butoxideD. t-butyl methyl ether

Answer» Correct Answer - B
`CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-Br+CH_(3)ON aoverset("Elimination")tounderset("Isobutylene")(CH_(3)-overset(CH_(3))overset(|)(C)=CH_(2)+CH_(3)OH+NaBr`
`CH_(3)Ona toCH_(3)O^(-)+Na^(+)`
methoxide ion `(CH_(3)O^(-))` is a strong base, therefore it abstract proton from `3^(@)` alkyl halide and favours elimination reaction.
37.

When `CH_(3)CH_(2)CHCl_(2)` is treated with `NaNH_(2)` the product formed isA. `CH_(3)-CH=CH_(2)`B. `CH_(3)-C-=CH`C. `CH_(3)CH_(2)CH(NH_(2))(Cl)`D. `CH_(3)CH_(2)C(NH_(2))_(2)`

Answer» Correct Answer - B
`CH_(3)-CH_(2)-CHCl_(2)+2NaNH_(2)underset(196K)overset("liq. "NH_(3))toCH_(3)C-=CH+2NaCl+2NH_(3)`
38.

`CHCl_(3) and HF` lead to the formation of a compound of fluorine of molecular weight 70. the compound isA. FluoroformB. Fluorine monoxideC. Fluorine dioxideD. Fluoromethanol

Answer» Correct Answer - A
We know that `CHCl_(3)+HFtoCFH_(3)+3HCl`. Thus in this reaction the compound obtained in fluoroform `(CHF_(3))`. As we know molecular weight of `CHF_(3)=70`
39.

Which of the following reactions gives `H_(2)C=C=C=CH_(2)`A. `CH_(2)Br-CBr=CH_(2)overset(Zn//CH_(3)OH)to`B. `HC-=C-CH_(2)-COOHunderset(40^(@)C)overset(Aq.K_(2)CO_(3))to`C. `CH_(2)Br-C-=C-CH_(2)Brunderset("Heat")overset(Zn)to`D. `2CH_(2)=CH-CH_(2)-Ito`

Answer» Correct Answer - C
`CH_(2)Br-C-=C-CH_(2)Br underset(Delta)overset(Zn)toCH_(2)=C=C=CH_(2)`.
40.

False statement isA. Chloroform is heavier than waterB. `C Cl_(4)` is non-inflammableC. Vinyl chloride is more reactive than allyl chlorideD. `Br^(-)` is a good nucleophile as compared to `I^(-)`

Answer» Correct Answer - C::D
Vinyl chloride is less reactive than allyl chloride due to resonance effect.
Order of nucleophilicity amongst the halide ion are as
`I^(-) gt Br^(-) gt Cl^(-)`.
41.

Statement I Benzonitrile is prepared by the reaction of chlorobenzene with potassium cyanide. Statement II Cyanide `(CN^(-))` is a strong nucleoohile.A. Both assertion and reason are correct and reason is the correct explanation of the assertionB. Both assertion and reason are correct, but reason is not the correct explanation of the assertionC. Assertion is correct but reason is incorrectD. Assertion is incorrect but reason is correct

Answer» Correct Answer - D
Assertion is incorrect but reason is correct.
42.

Alkyl iodide react with NaCN to give alkyl cyanide and small amount of alkyl isocyanide. Formation of these two product is due to theA. Ionic character of NaCNB. Nucleophilic character of `CN^(-)`C. Ambidentate character of `CN^(-)`D. Electrophilic character of `CN^(-)`

Answer» Correct Answer - C
:`overset(ө)(C)overset(.)(N)`: has ambidentate character because: `overset(ө)(C)overset(.)(N):` has double attacking site
`R-Ioverset(NaCN)tounderset("Major")(RCN)+underset("Minor")(RNC)`.
43.

What happens when `C Cl_(4)` is treated with `AgNO_(3)`A. `NO_(2)` will be evolvedB. A white ppt. of AgCl will be formedC. `C Cl_(4)` will dissolve in `AgNO_(3)`D. Nothing will happen

Answer» Correct Answer - D
`C Cl_(4)+AgNO_(3)to`No reaction
`C Cl_(4)` is a covalent compound. Therefore does not provide `Cl^(-)` ions.
44.

Chlorine reacts with ethanol to giveA. Ethyl chlorideB. ChloroformC. AcetaldehydeD. Chloral

Answer» Correct Answer - D
`CH_(3)CH_(2)OH+Cl_(2)toCH_(3)CHO+2HCl`
`CH_(3)CHO+3Cl_(2)tounderset("Chloral")(C Cl_(3)CHO)+3HCl`
45.

A grignard reagent may be made by reacting magnesium withA. Methyl amineB. Diethyl etherC. Ethyl iodideD. Ethyl alcohol

Answer» Correct Answer - C
`underset("Ethyl iodide")(C_(2)H_(5)I+Mg)overset("Dry ether")tounderset("Ethyl magnesium iodide")(C_(2)H_(5)-Mg-I)`
46.

Ethanol is converted into ethyl chloride by reacting withA. `Cl_(2)`B. `SOCl_(2)//Py`C. `HCl`D. NaCl

Answer» Correct Answer - B
`C_(2)H_(5)OH+SOCl_(2)overset("pyridine")toC_(2)H_(5)Cl+SO_(2)+HCl`
47.

Ethyl chloride on heating with AgCN fonns a compound (X ). The functional isomer of (X) is:A. `C_(2)H_(5)NC`B. `C_(2)H_(5)CN`C. `H_(3)C-NH-CH_(3)`D. `C_(2)H_(5)NH_(2)`

Answer» Correct Answer - B
`C_(2)H_(5)Cl+AgCN to underset("Ethyl isocyanide (X)")(C_(2)H_(5)-N overset(to)(=)C)+AgCl`
The functional isomer of ethyl isocyanide is ethyl cyanide `C_(2)H_(5)-C-=N`
48.

Ethyl bromide reacts with lead -sodium alloy to fromA. Tetraethyl leadB. Tetraethyl bromideC. Both (a) and (b)D. None of these

Answer» Correct Answer - A
`4C_(2)H_(5)Br+4Pb//Natounderset("Tetraethyl lead (TEL)")(C_(2)H_(5))_(4)Pb+4NaBr`
49.

Chloropicrin is used asA. SolventB. AnaestheticC. PerfumeD. Tear gas

Answer» Correct Answer - D
50.

Which one is the Swartz reaction from the followingA. `CH_(3)Br+NaIoverset("acetone")toCH_(3)I+NaCl`B. `CH_(3)Br+Nal overset("Acetone")toCH_(3)l+NaBr`C. `CH_(3)Br+AgFtoCH_(3)F+AgBr`D. `2CH_(3)Cl+2Naoverset("Dry ether")toCH_(3).CH_(3)+2NaCl`

Answer» Correct Answer - C
Swartz reaction.
`CH_(3)-Cl+AgF to CH_(3)F +AgCl`
`CH_(3)-Br+AgF to CH_(3)F +AgBr`