269 + Interview Questions in ORGANIC-COMPOUNDS-CONTAINING-HALOGENS IN GENERAL AWARENESS Page 2 InterviewSolution

51.	`S_(N)1` reaction is favoured byA. Non-polar solventsB. Crowding at the `alpha`-carbon atomC. Small groups on the carbon attached to the halogen atomD. All the above
Answer» Correct Answer - B Bulky groups on the carbon atom attached to the halogen atom i.e, crowding at the `alpha`-carbon atom favours the `S_(N^(1))` mechanism.

Discussion

52.	Teriary alkyl halides are practically inert to ` S_(N)2` mechanism because of .A. InsolubilityB. InstabilityC. Inductive effectD. Steric hindrance
Answer» Correct Answer - D Reactivity of t-alkyl halide depends upon transient state which decreases with hindrance in t-alkyl halide

Discussion

53.	Which of the follwing is the example of `S_(N)2` reaction .A. `CH_(3) Br + OH - CH_(3) OH + Br`B. `CH_(3) underset(Br)underset (\|)CHCH_(3) + OH rarrCH_(3) underset(OH)underset(\|)CHOH + Br^(-)`C. `CH_(3) CH_(2) OHoverset(_H_(2)O)rarrCH_(2) =CH_(2)`D. `CH_(3)-underset(Br)underset(\|)overset(CH_(3))overset(\|)C-CH_(3)+OH^(-)rarrCH_(3)-underset(H)underset(\|)overset(CH_(3))overset(\|)C-O-CH_(3)+Br^(-)`
Answer» Correct Answer - A Only `1^(@)` alky 1 halides I .e `CH_(3)Br` undergoes `S_(N)2` reaction .

Discussion

54.	Which one among the following compounds has the highest dipole moment ? .A. o-bromochlorobenzeneB. o-dibromobenzeneC. m-dichlorobenzeneD. o-dichlorobenzene
Answer» Correct Answer - D `mu _("resultant") = sqrt(mu_(1)^(2)+ mu_(2)^(2) + 2mu_(1) mu_(2)^(2) cos theta)` `Resultant is maximum when two groups are ortho to each other .

Discussion

55.	Which of the following halide will have highest dipole moment ?A. 1,4-DichlorobenzeneB. DichloromethaneC. TrichloromethaneD. m-Dichlorobenzene
Answer» Correct Answer - B `mu CH_(2)Cl_(2)=1.55 D`.

Discussion

56.	Among the following, the molecule with the highest dipole moment is :A. `CH_(3)CI`B. `CH_(2)CI_(2)`C. `CHCI_(3)`D. `C C_(4)`
Answer» Correct Answer - A `CH_(3)` has one `CI` atom which is more electronegative so it will have highest dipole moment .

Discussion

57.	Consider the following reactions which are carried out at the same temperature `CH_(3) -Br + OH^Theta overset(EtOH)rarr CH_(3) -OH + BrQ ...(i)` ` CH_(3) Br + OH^Theta overset(DMSO)rarr CH_(3) -OH + BrQ ...(ii)` Which of the following statement is correct about these reactionsA. Both the reactions take place at the same rateB. The first reaction takes place faster than second reaction .C. The second reaction takes place faster than first reaction .D. Both the reactions take place by `S_(N)1` mechanism .
Answer» Correct Answer - C Polar aprotic solvent favours `S_(N)2` mechanism .

Discussion

58.	Among the following, the molecule with the highest dipole moment is :A. `CH_(3)Cl`B. `CH_(2)Cl_(2)`C. `CHCl_(3)`D. `C Cl_(4)`
Answer» Correct Answer - A `CH_(3)Cl` have one `Cl` atom which is more electronegative so it will have highest dipole moment .

Discussion

59.	The `S_(N^(1))` reactivity of the following halides will be in the order: (i) `(CH_(3))_(3)C-Br` (ii) `(C_(6)H_(5))CHBr` (iii) `(C_(6)H_(5))_(2)C(CH_(3))Br` (iv) `(CH_(3))_(2)CHBr` (v) `C_(2)H_(5)Br`A. (v) gt (iv) gt (i) gt (ii) gt (iii)B. (ii) gt (iii) gt (v) gt (i) gt (iv)C. (i) gt (iii) gt (v) gt (ii) gt (iv)D. (iii) gt (ii) gt (i) gt (iv) gt (v)
Answer» Correct Answer - D More stable the carbocation more reactive is the alkyl halide in `S_(N^(1))` reaction. Since the stability of the carbocations decreases the order of their reactivity is `(C_(6)H_(5))_(2)overset(+)(C )CH_(3)gt (C_(6)H_(5))_(2)CH^(+)gt(CH_(3))_(3)C^(+)gt(CH_(3))_(2)C_(2)^(+)H_(5)`, hence the reactivity of the alkyl halides decreases in the same order. So (iii) gt (ii) gt (i) gt (iv) gt (v) i.e., (C ) is correct.

Discussion

60.	`CH_(3) -underset(C_(3)H_(7)(n))underset(\|)overset(C_(2)H_(5))overset(\|)C-CI overset(NaOH(ag))rarr CH_(3) -underset(C_(3)H_(7)(n))underset(\|)overset(C_(2)H_(5))overset(\|)C-CI` . The product obtained will be .A. d-formB. l-formC. racemic mixture mainlyD. None of these
Answer» Correct Answer - C As `RX` is `3^(@)` so carbocation being reactive intermediate mainly racemization occurs .

Discussion

61.	The correct increasing order of the reactivity of halides for `S_(N^(1))` reaction is:A. `CH_(3)CH_(2)X lt (CH_(3))_(2)CHX lt CH_(2)=CHCH_(2)X lt PhCH_(2)X`B. `(CH_(3))_(2)CHX lt CH_(3)CH_(2)X lt CH_(2)=CHCH_(2)X lt PhCH_(2)X`C. `PhCH_(2)X lt (CH_(3))_(2)CHX lt CH_(3)CH_(2)X lt CH_(2)=CHCH_(2)X`D. `CH_(2)=CHCH_(2)X lt PhCH_(2)X lt (CH_(3))_(2)CHX lt CH_(3)CH_(2)X`
Answer» Correct Answer - A The increasing order of reactivity is `1^(@) lt 2^(@) lt 3^(@) lt` alkyl benzyl

Discussion

62.	The increasing order of reactivity of the following isomeric halides with `Ag NO_(3) (H_(2)O+alcohol)` is (I) `C_(6) H_(5) -CH=CH - CH_(2) -CH_(2) -CI` (II) `C_(6) H_(5) -CH =CH-underset(Cl)underset(\|)(C)H-CH_(3)` (III) `C_(6) H_(5) - underset(CI)underset(\|)C =CH-CH_(2) -CH_(3)` (IV) `C_6H_5-underset(Cl)underset(\|)overset(C_6H_5)overset(\|)C-CH=CH_2`A. `III lt IV lt II lt I`B. `III lt IV lt II `C. `III lt I lt II lt IVD. `III lt I lt II lt IV ltIII`
Answer» Correct Answer - C On the basis of carbocation stability .

Discussion

63.	When chloroform is treated with conc `HNO_(3)` it givesA. `CHCI_(2)NO_(2)`B. `C CI_(3)NO_(2)`C. `CHCI_(2)HNO_(3)`D. None of these
Answer» Correct Answer - B `underset("Chlorform")(CHCI_(3))+conc. HNO_(3)rarrunderset("Chloropicrim")(C CI_(3)-NO_(2))+H_(2)O`

Discussion

64.	Westrosol has the following formulaA. `CHCl_(3)`B. `CH_(2)Cl_(2)`C. `CHCl_(2)CH_(2)Cl`D. `C Cl_(2)=CHCl`
Answer» Correct Answer - D `C Cl_(2)=CHCl`, westrosol.

Discussion

65.	A sample of chloroform being used as anaesthetic is tested by .A. Fehling solutionB. Ammoniacal `CU_(2)CI_(2)`C. `Ag NO_(3)` solutionD. `AgNO_(3)` solution after boiling with alcoholic `KOH` solution .
Answer» Correct Answer - C::D Before using the sample of chloroform as an anaesthetic it is tested by treating with aq solution of `AgNO_(3)` A pure sample does not give ppt with aq `AgNO_(3)` .

Discussion

66.	An anaesthetic : narcylene, is the commercial name of :A. `C_(2)H_(4)`B. `C_(2)H_(2)`C. `CHCl_(3)`D. Ether
Answer» Correct Answer - B `C_(2)H_(2)`

Discussion

67.	The compound `Cl_(2)C =CHCl` is known as westrosol. Which one of the following statement is wrong regarding this compound ?A. It is used as a solventB. It is used in refrigeratorsC. It is used as a degreasing agentD. It is obtained by reating westron with `Ca(OH)_(2)`.
Answer» Correct Answer - B Westrosol is not used in refrigerators.

Discussion

68.	A sample of chloroform being used as anaesthetic is tested by .A. `AgNO_(3)(aq)`B. Fehling solutionC. `AgNO_(3)(aq)` after boiling with KOHD. Any of the above.
Answer» Correct Answer - A `AgNO_(3)` (aq). If it given white ppt., then sample of chloroform contains phosgene.

Discussion

69.	Which of the following on reaction with chloroform will given chloretone ?A. `HNO_(3)`B. `(CH_(3))_(2)C=O`C. ChloralD. `(CH_(3))_(2)CHCHO`
Answer» Correct Answer - B `Cl-overset(Cl)overset("\|")underset(Cl)underset("\|")("C")-H+H_(3)C-overset(O)overset("\|\|")("C")-CH_(3)rarr underset("Chloretone")(H_(3)C-overset(OH)overset("\| ")underset(C Cl_(3))underset("\| ")("C ")-CH_(3))`

Discussion

70.	Which of the following ketone will not give yellow precipitate with `NaOH//I_(2)` ?A. `ICH_(2)COCH_(2)CH_(3)`B. `CH_(3)COOCOCH_(3)`C. `CH_(3)CONH_(2)`D. `CH_(3)CH(OH)CH_(2)CH_(3)`
Answer» Correct Answer - A::D `ICH_(2)COCH_(2)CH_(3)overset(I_(2)//NaOH)rarr CHI_(3)+CH_(3)CH_(2)COONa` `CH_(3)-overset(OH)overset(\|)(C )HCH_(2)CH_(3)overset(I_(2)//NaOH)rarr CHI_(3)+CH_(2)CH_(2)COONa`

Discussion

71.	`A overset(I_(2)//NaOH)rarr` Iodoform + Sod. Succinate In the above sequence A can beA. Pentan-2-oneB. AcetophenoneC. 4-KetopenoneD. Hexane-2,5-dione
Answer» Correct Answer - C::D `underset("4-Ketopentanoic acid")(CH_(3)-overset(O)overset("\|\|")(C )-CH_(2))-CH_(2)-COOH overset(I_(2)//NaOH)rarr` `underset("Iodoform")(CHI_(3))+NaOOC-underset("Sod. Succinate")(CH_(2)-CH_(2)-COONa)` `underset("Hexane-2,5-dione")(CH_(3)-overset(O)overset("\|\|")(C )-CH_(2)-CH_(2)-overset(O)overset("\|\|")-CH_(3))overset(I_(2)//NaOH)rarr` `underset("Iodoform")(2CHI_(3))+underset("Sod. succinate")(NaOOC-CH_(2)-CH_(2)-COONa)`

Discussion

72.	Assertion: Benzyl bromide when kept in acetone water produces benzyl alcohol. Reason: The reaction follows `S_(N)2` mechanism.
Answer» Correct Answer - C

Discussion

73.	What would be the product when propene reacts with chlorine in presence of `C Cl_(4)`A. PVCB. Allyl chlorideC. Vinyl chlorideD. 1,2-Dichloroethane
Answer» Correct Answer - B `CH_(3)-CH=CH_(2)overset(Cl_(2),773 K)underset(-HCl)rarr underset("Allyl chloride")(ClCH_(2)-CH=CH_(2))` Allylic substitution occurs

Discussion

74.	`Cl_(2)` reacts with `CS_(2)` in presence of `I_(2)` catalyst to formA. `CHCl_(3)`B. `C Cl_(4)`C. `C_(2)H_(5)Cl`D. `C_(2)H_(6)`
Answer» Correct Answer - B `CS_(2)+3Cl_(2)overset(Delta)underset(AlCl_(3))rarr C Cl_(4)+S_(2)Cl_(2)`

Discussion

75.	The raction of toluene with `CI_(2)` in presence of `FeCI_(3)` gives `X` and reaction in presence of light gives `Y` Thus `X` and `Y` are .A. `X`=Benzyl chloride, `Y =m-`chlorotolueneB. `X=` Benzal chloride, `Y=0`-chlorotolueneC. `X= m`- Benzal chloride, `Y=p`-chlorotolueneD. `X=`o-and p-chlorotoluene `Y` =Trichloromethy 1 benzene .
Answer» Correct Answer - D

Discussion

76.	`C_(3)H_(8)+CI_(2)overset(Light)toC_(3)H_(7)CI+HCI` is an example of which of the following types of reactions ?A. EliminationB. SubstitutionC. AdditionD. None of these
Answer» Correct Answer - B Free radical substitution.

Discussion

77.	`CF_(x)CI_(y)` [Where x + y =4] These compounds are not used becauseA. These are fluorocarbonsB. These are difficult to synthesiseC. They deplete ozone layerD. None of these
Answer» Correct Answer - C They deplete ozone layer.

Discussion

78.	Which responds to + ve iodoform test ?A. Butanol-1B. Butan-1-alC. Butanol-2D. 3-pentanone
Answer» Correct Answer - C Because it has `CH_(3)CHOH-R` alcohol system.

Discussion

79.	Ethyl bromide on treatment with alcoholic KOH givesA. EthyleneB. EthanolC. Acetic acidD. Ethane
Answer» Correct Answer - A `underset("bromide")underset("Ethyl")(C_(2)H_(5)Br)+underset("Alcoholic")(KOH)rarr underset("Ethylene")(C_(2)H_(4))+KBr+H_(2)O` This reaction ios known as dehydrohalogenation.

Discussion

80.	Chlorobenzene on reaction with `CH_(3)Cl` in the presence of anhy. `AlCl_(3)` will giveA. TolueneB. m-ChlorotolueneC. p-ChlorotolueneD. A mixture of o-and p-chlorotoluene
Answer» Correct Answer - D `-Cl` is ortho, para directing group (Friedel craft alkylation).

Discussion

81.	Chlorobenzene and benzyl chloride are distinguished byA. treatment with aq. KOH followed by neutralisation with `HNO_(3)` and then `AgNO_(3)` solutionB. Lucas regantC. decolourisation of `Br_(2)` in `C Cl_(4)`D. orange red colour with `CHCl_(3)//AlCl_(3)`
Answer» Correct Answer - A Benzyl chloride gives white ppt. but chlorobenzene does not.

Discussion

82.	The reactionof `CH_(3)CH=CH-CH_(2)Cl` with alcoholic KCN producesA. `CH_(3)-CH=CH-CH_(2)CN`B. `CH_(3)-CH(CN)CH=CH_(2)`C. Both A and BD. None of the above
Answer» Correct Answer - C `CH_(3)-CH=CH-CH_(2)Cl underset(-Cl^(-))rarr[CH_(3)-CH=CH-CH_(2)^(+)rarrCH_(3)-overset(+)(C )H-CH=CH_(2)]overset(CN^(-))rarrCH_(3)-CH=CH-CH_(2)CN+CH_(3)-overset(CN)overset("\| ")("C ")H-CH=CH_(2)`

Discussion

83.	`C_(6)H_(5)-CH_(2)-CI+KCN(aq)rarrC_(6)H_(5)-CH(2)-C=N+KCI` Compounds `X` and `Y` are .A. `C_(6)H_(6) +KCI`B. `C_(6)H_(5)CH_(2)CN+KCI`C. `C_(6)H_(5)CH_(3)+KCI`D. None of these
Answer» Correct Answer - B `C_(6)H_(5) -CH_(2)-CI+KCN(aq)` .

Discussion

84.	The molecular formula of a saturated compound is `C_(2)H_(4)Br_(2)`. The formula permits the existence of twoA. Functional isomersB. Position isomersC. Optical isomerismD. cis-trans isomerism.
Answer» Correct Answer - B Position Isomers.

Discussion

85.	The reaction of chloroform with alcoholic `KOH` and p-toluidine form-A. `CH_(3)OH`B. `CH_(3)NC`C. `C_(2)H_(5)NC`D. `C_(2)H_(5)CN`
Answer» Correct Answer - C `C_(2)H_(5)NC`

Discussion

86.	What happens when `C Cl_(4)` is treated with `AgNO_(3)` solution ?A. `NO_(2)` will be evolvedB. A white ppt. of AgCl will formC. `C Cl_(4)` will dissolve in `AgNO_(3)` solutionD. Nothing will happen.
Answer» Correct Answer - D Nothing will happen.

Discussion

87.	The order of reactivity of `AlCl_(3), BF_(3), SbCl_(5), FeCl_(3)` in Friedal Craft reaction varies asA. `AlCl_(3)gt BF_(3)gt FeCl_(3)gt SbCl_(5)`B. `AlCl_(3)lt BF_(3)lt SbCl_(5)lt FeCl_(3)`C. `BF_(3)gt AlCl_(3)gt FeCl_(3)gt SbCl_(5)`D. `FeCl_(3)gt AlCl_(3)gt BF_(3)gt SbCl_(5)`
Answer» Correct Answer - A Stronger the Lewis acid, more is the reactivity in this reaction. This correct order or reactivity is `AlCl_(3) gt BF_(3)gt FeCl_(3) gt SbCl_(5)`

Discussion

88.	Assertion`:` `1-`Butene ono reaction with `HBr` in the presence of a peroxide produces `1-`bromo`-`butane Reason`:` It involves the free radical mechanism.
Answer» Correct Answer - C Correct Reason The reaction oC Curs throught the formation of a more stable `2^(@)` free radical .

Discussion

89.	Benzene haxachloride isA. 1,2,3,4,5,6-hexachlorocyclohexaneB. 1,2,3,4,5,6-hexachlorocyclohexeneC. 1,6-phenyl-1,6-chlorohexaneD. 1,1-phenyl-6,6-chlorohexane
Answer» Correct Answer - A `1,2,3,4,5,6-hexachlorocylohexane .

Discussion

90.	What is the final product of reaction `CH_(3) -C = CH overset(Na)rarroverset(CH_(3)-CH_(2)-1)rarr` .A. `CH_(2) CHCH_(2) CH_(3)`B. `CH_(3)CH_(2) C C CH_(2) CH_(3)`C. `CH CCH_(2) CH_(2) CH_(3)`D. `CH_(3) C C CH_(2) CH_(3)`
Answer» Correct Answer - D `CH_(3) -C-=CH overset(Na)rarrCH_(3) -C-=C-Na^(+) underset(S_(N)2)overset(CH_(3) -CH_(2) -I)rarr` `CH_(3) -C-= C-CH_(2) -CH_(3)` .

Discussion

91.	What is the main product of the reaction between 2 -methy propene with `HB ?A. 1-bromo butaneB. 1-bromo-2 methyl propaneC. 2-bromo butaneD. 2-bromo-2 methyl propane
Answer» Correct Answer - D `CH-underset(CH_(3))underset(\|)CH =CH_(2) + HBr rarrCH_(3) -underset("2-Bromo,2-methyl propane")underset(CH_3)underset(\|)overset(Br)overset(\|)(C)-CH_(3)`

Discussion

92.	Which one is the strongest nucleophilic site in the following species ? .A. 1B. 2C. 3D. 4
Answer» Correct Answer - D In 4th negative charge is not taking part in conjugation .

Discussion

93.	The strongest acid amongst the following isA. Salicyclic acidB. m-Hydroxybenzoic acidC. p-Hydroxybenzoic acidD. Benzoic acid
Answer» Correct Answer - A Salicyclic acid because it stabilises the corresponding salicyclate ion by intramolecular H-bonding.

Discussion

94.	Mustard gas is:A. `CHCl_(2) CHCl_(2)`B. `CHCl=C Cl_(2)`C. `(CH_(2)CH_(2)Cl)_(2)S`D. `CHFCl_(2)`
Answer» Correct Answer - C Mustard gas (a war gas) is `(CH_(2)CH_(2)Cl)_(2)S`.

Discussion

95.	During bromination of benzene in the presence of `FeBr_(3)` the species that attacks the ring to initiate the process isA. `FeBr_(4)^(-)`B. `Br^(+)`C. `Br^(-)`D. `Br_(2)` molecule
Answer» Correct Answer - B Bromination is initiated by the attack of `Br^(+)` (brominium ion) on the benzene ring.

Discussion

96.	Which of the following compounds will show meso isomer ?A. 2-chlorobutaneB. 2,3, dichloro butaneC. 2,3-dichloropentaneD. 2-hydroxypropanoic acid
Answer» Correct Answer - B `H-overset(H)overset("\|\|")underset(H)underset(\|)(C )-overset(H)overset(\|)underset(Cl)underset(\|)(C )-H` 1, 1-dichloro ethane (ii) has meso-isomer also Both also isomeres

Discussion

97.	Reactivity order of halides of dehydrohalogenation isA. `R-F gt R-Cl gt R-Br gt R-I`B. `R-I gt R-Br gt R-Cl gt R-F`C. `R-I gt R-Cl gt R-Br gt R-F`D. `R-F gt R-I gt R-Br gt R-Cl`
Answer» Correct Answer - B For alkyl halide with the same R but different halogens, the order of reactivity towards substitution, dehydrohalogenation follows the same order i.e., `R-I gt R-Br gt R-Cl gt R-F`

Discussion

98.	2-bromopentane is heated with postassium ethoxide in ethano1 The major product obtained is .A. 2-EthoxypentaneB. Pent-1-eneC. cis-Pent-2-eneD. trans-Pent-2-ene
Answer» Correct Answer - D `beta`-elimination is trans in nature.

Discussion

99.	Chloropicrin isA. Trichloro acetaldehydeB. NitrochlorofromC. `2,4,6-trinitro pheno1D. None of these
Answer» Correct Answer - B

Discussion

100.	Aryl halides are less reactive towards nucleophilic substitution reaction as compared to alkyl halides due toA. the formation of less stable carbonium ionB. resonance stabilizationC. Longer carbon-halogen bondD. `sp^(2)`-Hybridized carbon attached to halogen.
Answer» Correct Answer - B::D Aryl halides are less reactive than alkyl halides towards nucleophilic substitution because of resonance stabilization and `sp^(2)`-hybridised carbon atom attached to halogen atom.

Discussion

Explore topic-wise InterviewSolutions in .

`S_(N)1` reaction is favoured byA. Non-polar solventsB. Crowding at the `alpha`-carbon atomC. Small groups on the carbon attached to the halogen atomD. All the above

Teriary alkyl halides are practically inert to ` S_(N)2` mechanism because of .A. InsolubilityB. InstabilityC. Inductive effectD. Steric hindrance

Which one among the following compounds has the highest dipole moment ? .A. o-bromochlorobenzeneB. o-dibromobenzeneC. m-dichlorobenzeneD. o-dichlorobenzene

Which of the following halide will have highest dipole moment ?A. 1,4-DichlorobenzeneB. DichloromethaneC. TrichloromethaneD. m-Dichlorobenzene

Among the following, the molecule with the highest dipole moment is :A. `CH_(3)CI`B. `CH_(2)CI_(2)`C. `CHCI_(3)`D. `C C_(4)`

Among the following, the molecule with the highest dipole moment is :A. `CH_(3)Cl`B. `CH_(2)Cl_(2)`C. `CHCl_(3)`D. `C Cl_(4)`

`CH_(3) -underset(C_(3)H_(7)(n))underset(|)overset(C_(2)H_(5))overset(|)C-CI overset(NaOH(ag))rarr CH_(3) -underset(C_(3)H_(7)(n))underset(|)overset(C_(2)H_(5))overset(|)C-CI` . The product obtained will be .A. d-formB. l-formC. racemic mixture mainlyD. None of these

When chloroform is treated with conc `HNO_(3)` it givesA. `CHCI_(2)NO_(2)`B. `C CI_(3)NO_(2)`C. `CHCI_(2)HNO_(3)`D. None of these

Westrosol has the following formulaA. `CHCl_(3)`B. `CH_(2)Cl_(2)`C. `CHCl_(2)CH_(2)Cl`D. `C Cl_(2)=CHCl`

A sample of chloroform being used as anaesthetic is tested by .A. Fehling solutionB. Ammoniacal `CU_(2)CI_(2)`C. `Ag NO_(3)` solutionD. `AgNO_(3)` solution after boiling with alcoholic `KOH` solution .

An anaesthetic : narcylene, is the commercial name of :A. `C_(2)H_(4)`B. `C_(2)H_(2)`C. `CHCl_(3)`D. Ether

The compound `Cl_(2)C =CHCl` is known as westrosol. Which one of the following statement is wrong regarding this compound ?A. It is used as a solventB. It is used in refrigeratorsC. It is used as a degreasing agentD. It is obtained by reating westron with `Ca(OH)_(2)`.

A sample of chloroform being used as anaesthetic is tested by .A. `AgNO_(3)(aq)`B. Fehling solutionC. `AgNO_(3)(aq)` after boiling with KOHD. Any of the above.

Which of the following on reaction with chloroform will given chloretone ?A. `HNO_(3)`B. `(CH_(3))_(2)C=O`C. ChloralD. `(CH_(3))_(2)CHCHO`

Which of the following ketone will not give yellow precipitate with `NaOH//I_(2)` ?A. `ICH_(2)COCH_(2)CH_(3)`B. `CH_(3)COOCOCH_(3)`C. `CH_(3)CONH_(2)`D. `CH_(3)CH(OH)CH_(2)CH_(3)`

`A overset(I_(2)//NaOH)rarr` Iodoform + Sod. Succinate In the above sequence A can beA. Pentan-2-oneB. AcetophenoneC. 4-KetopenoneD. Hexane-2,5-dione

Assertion: Benzyl bromide when kept in acetone water produces benzyl alcohol. Reason: The reaction follows `S_(N)2` mechanism.

What would be the product when propene reacts with chlorine in presence of `C Cl_(4)`A. PVCB. Allyl chlorideC. Vinyl chlorideD. 1,2-Dichloroethane

`Cl_(2)` reacts with `CS_(2)` in presence of `I_(2)` catalyst to formA. `CHCl_(3)`B. `C Cl_(4)`C. `C_(2)H_(5)Cl`D. `C_(2)H_(6)`

`C_(3)H_(8)+CI_(2)overset(Light)toC_(3)H_(7)CI+HCI` is an example of which of the following types of reactions ?A. EliminationB. SubstitutionC. AdditionD. None of these

`CF_(x)CI_(y)` [Where x + y =4] These compounds are not used becauseA. These are fluorocarbonsB. These are difficult to synthesiseC. They deplete ozone layerD. None of these

Which responds to + ve iodoform test ?A. Butanol-1B. Butan-1-alC. Butanol-2D. 3-pentanone

Ethyl bromide on treatment with alcoholic KOH givesA. EthyleneB. EthanolC. Acetic acidD. Ethane

Chlorobenzene on reaction with `CH_(3)Cl` in the presence of anhy. `AlCl_(3)` will giveA. TolueneB. m-ChlorotolueneC. p-ChlorotolueneD. A mixture of o-and p-chlorotoluene

Chlorobenzene and benzyl chloride are distinguished byA. treatment with aq. KOH followed by neutralisation with `HNO_(3)` and then `AgNO_(3)` solutionB. Lucas regantC. decolourisation of `Br_(2)` in `C Cl_(4)`D. orange red colour with `CHCl_(3)//AlCl_(3)`

The reactionof `CH_(3)CH=CH-CH_(2)Cl` with alcoholic KCN producesA. `CH_(3)-CH=CH-CH_(2)CN`B. `CH_(3)-CH(CN)CH=CH_(2)`C. Both A and BD. None of the above

`C_(6)H_(5)-CH_(2)-CI+KCN(aq)rarrC_(6)H_(5)-CH(2)-C=N+KCI` Compounds `X` and `Y` are .A. `C_(6)H_(6) +KCI`B. `C_(6)H_(5)CH_(2)CN+KCI`C. `C_(6)H_(5)CH_(3)+KCI`D. None of these

The molecular formula of a saturated compound is `C_(2)H_(4)Br_(2)`. The formula permits the existence of twoA. Functional isomersB. Position isomersC. Optical isomerismD. cis-trans isomerism.

The reaction of chloroform with alcoholic `KOH` and p-toluidine form-A. `CH_(3)OH`B. `CH_(3)NC`C. `C_(2)H_(5)NC`D. `C_(2)H_(5)CN`

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

The order of reactivity of `AlCl_(3), BF_(3), SbCl_(5), FeCl_(3)` in Friedal Craft reaction varies asA. `AlCl_(3)gt BF_(3)gt FeCl_(3)gt SbCl_(5)`B. `AlCl_(3)lt BF_(3)lt SbCl_(5)lt FeCl_(3)`C. `BF_(3)gt AlCl_(3)gt FeCl_(3)gt SbCl_(5)`D. `FeCl_(3)gt AlCl_(3)gt BF_(3)gt SbCl_(5)`

Assertion`:` `1-`Butene ono reaction with `HBr` in the presence of a peroxide produces `1-`bromo`-`butane Reason`:` It involves the free radical mechanism.

Benzene haxachloride isA. 1,2,3,4,5,6-hexachlorocyclohexaneB. 1,2,3,4,5,6-hexachlorocyclohexeneC. 1,6-phenyl-1,6-chlorohexaneD. 1,1-phenyl-6,6-chlorohexane

What is the final product of reaction `CH_(3) -C = CH overset(Na)rarroverset(CH_(3)-CH_(2)-1)rarr` .A. `CH_(2) CHCH_(2) CH_(3)`B. `CH_(3)CH_(2) C C CH_(2) CH_(3)`C. `CH CCH_(2) CH_(2) CH_(3)`D. `CH_(3) C C CH_(2) CH_(3)`

What is the main product of the reaction between 2 -methy propene with `HB ?A. 1-bromo butaneB. 1-bromo-2 methyl propaneC. 2-bromo butaneD. 2-bromo-2 methyl propane

Which one is the strongest nucleophilic site in the following species ? .A. 1B. 2C. 3D. 4

The strongest acid amongst the following isA. Salicyclic acidB. m-Hydroxybenzoic acidC. p-Hydroxybenzoic acidD. Benzoic acid

Mustard gas is:A. `CHCl_(2) CHCl_(2)`B. `CHCl=C Cl_(2)`C. `(CH_(2)CH_(2)Cl)_(2)S`D. `CHFCl_(2)`

During bromination of benzene in the presence of `FeBr_(3)` the species that attacks the ring to initiate the process isA. `FeBr_(4)^(-)`B. `Br^(+)`C. `Br^(-)`D. `Br_(2)` molecule

Which of the following compounds will show meso isomer ?A. 2-chlorobutaneB. 2,3, dichloro butaneC. 2,3-dichloropentaneD. 2-hydroxypropanoic acid

Reactivity order of halides of dehydrohalogenation isA. `R-F gt R-Cl gt R-Br gt R-I`B. `R-I gt R-Br gt R-Cl gt R-F`C. `R-I gt R-Cl gt R-Br gt R-F`D. `R-F gt R-I gt R-Br gt R-Cl`

2-bromopentane is heated with postassium ethoxide in ethano1 The major product obtained is .A. 2-EthoxypentaneB. Pent-1-eneC. cis-Pent-2-eneD. trans-Pent-2-ene

Chloropicrin isA. Trichloro acetaldehydeB. NitrochlorofromC. `2,4,6-trinitro pheno1D. None of these

Aryl halides are less reactive towards nucleophilic substitution reaction as compared to alkyl halides due toA. the formation of less stable carbonium ionB. resonance stabilizationC. Longer carbon-halogen bondD. `sp^(2)`-Hybridized carbon attached to halogen.