995 + Interview Questions in HYDROCARBONS IN GENERAL AWARENESS Page 8 InterviewSolution

351.	`(CH_(3))_(2)C=CHCH_(3)+NOBr rarr` Product . The structure of the product isA. `(CH_(3))_(2)C(NO)-CH(Br)CH_(3)`B. `(CH_(3))_(2)C(Br)-CH(NO)CH_(3)`C. `(CH_(3))_(2)CH-C(NO)(Br)CH_(3)`D.
Answer» Correct Answer - b The reaction follows Markownikoff rule, namely the bromide ion adds on to the carbon having the least number of hydrogen and the more positive part namely the `-NO` group adds to the other carbon of the double bond.

Discussion

352.	The major product obtained on treatment of `CH_(3) CH_(2)CH(F)` `CH_(3)with CH_(3)O^(-)//CH_(3)OH` is .A. `CH_(3)CH_(2)CH(OCH_(3))CH_(3)`B. `CH_(3)CH=CHCH_(3)`C. `CH_(3)CH_(2)CH=CH_(2)`D. `CH_(3)CH_(2)CH_(2)OCH_(2)`
Answer» Correct Answer - b `CH_(3)CH_(2)-CH(F)-CH_(3)` is a secondary halid. So, it will undergo dehydro`-` halogenation to form alkene. `CH_(3)CH_(2)-CH(F)-CH_(3)overset(CH_(3)O)rarrCH_(3)-CH=CH-CH_(3)`

Discussion

353.	Given below, catalyst and corresponding process/reaction are matched. The mismatch isA. `[RhCl(PPh_(3))_(2):` HydrogenationB. `TiCl_(4)+Al(C_(2)H_(5))_(3):` PolymerizationC. `V_(2)O_(5):` Haber`-` Bosch processD. Nickel `-` Hydrogenation
Answer» Correct Answer - c `V_(2)O_(5)` is used as a catalyst in contact process for the manufacture of `SO_(3)` and hence `H_(2)SO_(4)`. In Haber `-` Bosch process for the manufacture of `NH_(3)`, finely divided `Fe+` molybdenum are used.

Discussion

354.	An organic compound (A), `C_6H_10` , on reduction first gives (B), `C_6H_12` , and finally (C ),`C_6H_14`, (A) on ozonolysis followed by hydrolysis gives two aldehydes (D) , `C_2H_4O`, and (E) , `C_2H_2O_2`. Oxidation of (B) with acidified `KMnO_4` gives only the acid (F), `C_3H_6O_2`. Determine the structure of the compound (A) to (F) with proper reasoning .
Answer» (i)Since the aldehyde (E) contains two O atoms , therefore, it must be a dialdehyde. The only dialdehyde having the molecular formula , `C_2H_2O_2` is glyoxal, i.e., O=CH-CH=O . The other aldehyde (D) having the molecular formula , `C_2H_4O` must be acetaldehyde, i.e., `CH_3CHO`. Further since glyoxal is a dialdehyde therefore, two molecules of acetaldehyde must have been formed . Thus, the structure of the alkene (A) is `underset"Hexa-2,4-diene(A)"(CH_3CH=CH-CHCH_3)underset((ii)Zn//H_2O)overset((i)O_3//CH_2Cl_2)to underset"Acetaldehyde"(CH_3CH)=O+O = underset"Glyoxal"(CH-CH)=O+O =underset"Acetaldehyde"(CHCH_3)` (ii)Since, (A) on reduction gives (B) which on oxidation with alk. `KMnO_4` gives only the acid (F), therefore (B) must be hex-3-ene and (F) must be propanoic acid `underset"[A]"(CH_3CH=CH-CH=CHCH_3)underset"1,4-Addition"overset(H_2//Ni)to underset"Hex-3-ene(B)"(CH_3CH_2CH=CHCH_2CH_3)overset"[O]"to underset"Propanoic acid (F)"(CH_3CH_2COOH)+ underset"Propanoic acid(F)"(CH_3CH_2COOH)` (iii)Since (A) on reduction first gives B (hex-3-ene) and finally (C ) , therefore , (C) must be n-hexane. `underset"Hex-3-ene"(CH_3CH_2CH=CHCH_2CH_3)overset(H_2//Ni)to underset"n-Hexane(C)"(CH_3CH_2CH_2CH_2CH_2CH_3)`

Discussion

355.	The reaction between benzene and ICI in presence of anhyd. `AICI_3` yields _____
Answer» Correct Answer - iodobenzene

Discussion

356.	Among the following , the most stable conformation of n-butane isA. B. C. D.
Answer» Correct Answer - C Anti-conformation (c ) of n-butane is the most stable since the two bulky `CH_3` groups are as far apart as possible .

Discussion

357.	Which of the following compounds will exhibit geometrical isomerism ?A. 2-Phenyl-1-buteneB. 1,1-Diphenyl-1-propeneC. 1-Phenyl-2-buteneD. 3-Phenyl-1-butene
Answer» Correct Answer - C Only in 1-phenyl-2-butene `(C_6H_5CH_2-CH=CH-CH_3)` both the carbon atoms of the double bond have different substituents and hence shows geometrical isomerism.

Discussion

358.	An alkene is formed from a carbocation byA. Elimination of a `H^(+)` ionB. Elimination of `H^(-)` ionC. Addtion of a `H^(+)` ionD. Addition of a `H^(-)` ion
Answer» Correct Answer - a a

Discussion

359.	Geometrical isomerism is causedA. by restricted rotation around C=C bondB. by the presence of one asymmetric carbon atomC. due to the differennt groups attached to the same functional groupD. by swing of hydrogenn atom between two divalent atoms.
Answer» Correct Answer - A Geometrical isomerism arises due to restricted rotation around C=C bond.

Discussion

360.	Benzene on ozolysis yields.A. GlyoxalB. AcetoneC. EthanolD. Methanol
Answer» Correct Answer - A `C_(6)H_(6) underset((ii)H_(2)O//Zn))overset((i)O_(6))3 underset("Glyoxal")overset(CHO)overset(\|)(CHO)`

Discussion

361.	The most reactive hydrocarbon isA. EtheneB. EthyneC. EthaneD. Methane
Answer» Correct Answer - A Alkynes are less reactive than alkenes

Discussion

362.	Hydration of acetylene to ethanal is catalysed byA. `Ba^(2+)`B. `Na^(+)`C. `Li^(+)`D. None
Answer» Correct Answer - A `underset("Acetylene")CH-=CH+H_(2)O overset(Ba^(2+))to [CH_(2)=CHH] to underset("Ethanol")(CH_(3)CHO)`

Discussion

363.	Each of the following alkul halide reacts with sodium metal in presnce of ether to form alkane exceptA. `CH_(3)Cl`B. `CH_(3)CH_(2)Cl`C. `CH_(3)-underset(CH_(3))underset(\|)(CH)-Cl`D. `(CH_(3))_(3)C Cl`
Answer» Correct Answer - D Tertiary alkul halides undergo elimination when treated with Na/dry ether to form an alkenet.

Discussion

364.	The o,p-directing byt deactivating group isA. `-NH_(2)`B. `-OH`C. R-(alkyl)D. X-(halogen)
Answer» Correct Answer - D Due to large size of X(halogen) the lone pair does not participate into resonance with C of benzene fully. Further X is more electronegative than C.

Discussion

365.	The function of CaO in the reaction `RCO_(2)^(-) underset("Heat")overset(NaOH+CaO)to` isA. that of a catalystB. that of a dehydration agentC. that of a drying agentD. that of a nucleophilic agent.
Answer» Correct Answer - C NaOH is deliquscent. To keep it dry CaO (a drying agent) is added.

Discussion

366.	The main product produced in the dehydrohalogenation of 2-bromo-3,3-dimethylbutane is:A. 3,3-dimethylbuteneB. 2,3-dimethylbuteneC. 2,3-dimethylbut-2-eneD. 4-methylpent-2-ene
Answer» Correct Answer - C

Discussion

367.	When but-I-yne is treated with excess of HBr the expected product isA. 1,2-DibromobtutaneB. 2,3-DibromobutaneC. 1,1-DibromobutaneD. All of these
Answer» Correct Answer - B `CH_(3)CH_(2)C-=CH+HBr to CH_(3)CH_(2)-CBr=CH_(2) overset(HBr)to CH_(3)CH_(2)C(Br)_(2)CH_(3)`

Discussion

368.	But-1-yne can be converted into 1-bromo-1-butene by reacting it with which of the following reagent?A. HBrB. HBr and `C_(6)H_(5)COO_(2)`C. `Br_(2) and H_(2)O_(2)`D. `Br_(2) and C Cl_(4)`
Answer» Correct Answer - B `CH_(3)CH_(2)C-=CH+HBr overset("Peroxide")to CH_(3)CH_(2)CH=CHBr`

Discussion

369.	The hydrocarrbon which gives benzene on passing through a red hot iron tube isA. `CH_(4)`B. `C_(2)H_(2)`C. `C_(2)H_(4)`D. `C_(2)H_(6)`
Answer» Correct Answer - B `3C_(2)H_(2) overset("Red hot Cu tube")to C_(6)H_(6)("benzene")`

Discussion

370.	The reactioin of HBr with `CH_(3)C-undeA. `CH_(3)underset(CH_(3))underset(\|)(CBr)-CH_(3)`B. `CH_(3)CH_(2)CH_(2)CH_(2)-Br`C. `CH_(3)-underset(CH_(3))underset(\|)(CH)-CH_(2)Br`D. `CH_()CH_(2)-underset(Br)underset(\|)(C)-H-CH_(3)`
Answer» Correct Answer - C

Discussion

371.	Write IUPAC name of the following
Answer» 4-Ethyl-2,5,7-decariene.

Discussion

372.	Assertion. Calcium carbide on hydrolysis gives ethylene Reason. Calcium carbide contains `C^(4-)` anionsA. If both assertion and reason are true, and reason is the true explanation of the assertion.B. If both assertion and reason are true, but reason is not the true explanation of the assertion.C. If assertion is true, but reason is false.D. If both assertion and reason are false
Answer» Correct Answer - D Correct assertion. Calcium carbide on hydrolysis gives acetylene. Correct reason. `CaC_2` contains `C_2^(2-)` anion.

Discussion

373.	In the alkane `H_3C-CH_(2)-C(CH_(3))_2-CH_(2)-CH(CH_(3))_2`, identify `1^(@),2^(@),3^(@),` carbon atoms and give the number of H atoms bonded to each one of these.
Answer» Correct Answer - `{:(" "1^(@)),(" "H" "H" "CH_(3)" "H" "H),(" "\|1^(@)" "\|2^(@)" "\|4^(@)" "\|2^(@)" "\|3^(@)" "1^(@)),(H-C" "-C" "-C" "-C" "-C" "-CH_(3)),(" "\|" "\|" "\|" "\|" "\|),(" "H" "H" "CH_(3)" "H" "CH_(3)),(" "1^(@)" "1^(@)):}` 15 H attached to `1^(@)` carbons 4H attached to `2^(@)`carbons 1H attached to `3^(@)` carbons `1^(@)` carbon atoms are those which are bonded to only one carbon atom i.e., they have only one carbon atom as their neighbour. The given structure has five `1^(@)` carbon atoms and fifteen hydrogen atoms attached to it. `2^(@)` carbon atoms are those which are bonded to two carbon atoms i.e., they have two carbon atoms as their neighbours. The given structure has two `2^(@)` carbon atoms and four hydrogen atoms attached to it. `3^(@)` carbon atoms are those which are bonded to three carbon atoms i.e., they have three carbon atoms as their neighbours. The given structure has one 3° carbon atom and only one hydrogen atom is attached to it.

Discussion

374.	What is the major product obtained when 2-bromobutane is heated with alcoholic KOH? Write only the major product expected to be obtained.
Answer» `CH_(3)-CH_(2)-underset(Br)underset(\|)(CH)-CH_(3)underset(Delta)overset("alc".KOH)rarrCH_(3)-CH=CH-CH_(3)+KBr+H_(2)O`

Discussion

375.	In the reaction , `C_2H_5Br underset((ii)CuI)overset((i)Li)to "(X)" overset(CH_3Br)to (Y) `, the products X and Y are ________ and ____________ respectively.
Answer» Correct Answer - `(C_2H_5)_2 CuLi, CH_3C_2H_5`

Discussion

376.	How many products will be formed in this reaction? A. `10`B. `2`C. `3`D. `4`
Answer» Correct Answer - b Two products will be obtained by addition reaction above and below the plane of ring. It is the example of syn hydroxylation.

Discussion

377.	Those groups which activate the benzene ring are generallyA. o-directingB. p-directingC. o-and m-directingD. o-and p-directing.
Answer» Correct Answer - D

Discussion

378.	Which among the following is a non-planar molecule?A. B. C. D.
Answer» Correct Answer - C

Discussion

379.	What does circle inside the benzene ring indicate?
Answer» A delocalized ring of pi electrons.

Discussion

380.	Suggest the name of a Lewis acid other than anhydrous aluminium chloride which can be used during ethylation of benzene.
Answer» Anhydrous FeCl₃, SnCl₄, BF₃

Discussion

381.	Suggest the name of Lewis acids other than anhydrous aluminium chloride which can be used during ethylation of benzene.
Answer» anhydrous FeCl₃, SnCl₄, BF₃ etc.

Discussion

382.	In the presence of peroxide, addition of HBr to prepare propene takes place according to anti Markovnikov's rule but peroxide effect is not seen in the case of HCl and HI. Explain.
Answer» Homolysis of HCl does not takes place and in the case of HI, homolysis takes place but the iodide free radical combine with the similar free radical to form I₂ molecule. Thus, peroxide effect is observed only in case of HBr.

Discussion

383.	Name two tests to test the presence of double bond in a compound.
Answer» (i) Decolourises brown colour of bromine water (ii) Decolourising pink colour of Baeyer’s reagent.

383.

Name two tests to test the presence of double bond in a compound.

Answer»

(i) Decolourises brown colour of bromine water

(ii) Decolourising pink colour of Baeyer’s reagent.

Discussion

384.	The addition of HCl in presence of peroxide does not follow anti-Markownikov’s rule because ………….. (A) HCl bond is too strong to be broken homolytically (B) Cl atom is not reactive enough to add on to a double bond (C) Cl atom combines with H atom to form HCl (D) HCl is a reducing agent
Answer» Correct option is: (A) HCl bond is too strong to be broken homolytically The addition of HCl in presence of peroxide does not follow anti-Markownikov’s rule because HCl bond is too strong to be broken hmolytically. (A) HCl bond is too strong to be broken homolytically

384.

The addition of HCl in presence of peroxide does not follow anti-Markownikov’s rule because ………….. (A) HCl bond is too strong to be broken homolytically (B) Cl atom is not reactive enough to add on to a double bond (C) Cl atom combines with H atom to form HCl (D) HCl is a reducing agent

Answer»

Correct option is: (A) HCl bond is too strong to be broken homolytically

The addition of HCl in presence of peroxide does not follow anti-Markownikov’s rule because HCl bond is too strong to be broken hmolytically.

(A) HCl bond is too strong to be broken homolytically

Discussion

385.	In a compound electrophilic substitution has occurred the substituents E are methyl `-CH_(3)Cl-CCl_(3)` and `-CHCl_(2)` the correct increasing order towards electrophilic substitution isA. `-CH_(3) lt -CH_(2)Cl lt -CHCl_(2) lt -C Cl_(3)`B. `-CH_(3) lt -CH_(2)Cl lt -CH_(2)Cl lt -C Cl_(3)`C. `-C Cl_(3) lt -CH_(2)Cl lt -CHCl_(2) lt -CH_(3)`D. `-C Cl_(3) lt -CHCl_(2) lt -CHCl_(2) lt -CH_(3)`
Answer» Correct Answer - D

Discussion

386.	What are meta directing groups. Give examples.
Answer» The substituents or groups which direct the incoming group to meta position called meta directing groups. -NO₂ , -CN,-CHO,-COOH , SO₃H

386.

What are meta directing groups. Give examples.

Answer»

The substituents or groups which direct the incoming group to meta position called meta directing groups.

-NO₂ , -CN,-CHO,-COOH , SO₃H

Discussion

387.	What is the chief product of reaction between `beta`-butylene chloride and alc. KOH/`NaNH_(2)`A. 1,2-butadieneB. 1,3-butadieneC. 2-butyneD. 1-butyne
Answer» Correct Answer - C

Discussion

388.	Assertion `:` `CH_(4)` does not react `Cl_(2)` in dark. Reason`:` Chlorination of `CH_(4)` takes place in sunlight.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 - b Clorination of `CH_(4)` takes place either in presence of light or at high temperature, and not in dark because in darkness, `Cl` free radicals are not produced.

Discussion

389.	Consider the following reaction. Which of the following base will give the best yield of the alkene II as the major product?A. `CH_(3)O^(-)`B. `C_(2)H_(5)O^(-)`C. `(CH_(3))_(3)CO^(-)`D. `(C_(2)H_(5))_(3)CO_(-)`
Answer» Correct Answer - D As the size of base increases amount of least substituted alkenes increases

Discussion

390.	Acetylene is used in the large scale production ofA. PolytheneB. Vinyl chlorideC. Ethyl alcoholD. Benzene
Answer» Correct Answer - B

Discussion

391.	The compounds `A` and `B` in the sequence `CH-=CH+H_(2)O overset(H_(2)SO_(4), HgSO_(4)) underset(60^(@)C)rarrAoverset([O])rarrB` areA. acetone and acetic acid respectivelyB. acetaldehyde and acetic acid respectivelyC. acetaldehyde and ethyl alcohol respectivelyD. ethyl alcohol and acetaldehyde respectively
Answer» Correct Answer - B `HC=CH+H_(2)O underset(H_(2)SO_(4) 60^(@)C)overset(H_(2)SO_(4))to `H_(3)C-CIO overset([O])to CH_(3)COOH`

Discussion

392.	The most volatile alkane is:A. n-pentaneB. isopentaneC. neopentaneD. n-hexane
Answer» Correct Answer - C Neo-group have least surface area due to branching so it have lowest B.P.

Discussion

393.	The compounds `A` and `B` in the sequence `CH-=CH+H_(2)O overset(H_(2)SO_(4), HgSO_(4)) underset(60^(@)C)rarrAoverset([O])rarrB` areA. Acetone and acetic acid respectivelyB. Acetaldehyde and acetic acid respectivelyC. Acetaldehyde and ethyl alcohol respectivelyD. Acetone and acetaldehyde respectively
Answer» Correct Answer - b `CH-=CH+H_(2)Ooverset(H_(2)SO_(4), HgSO_(4))underset(60^(@)C)rarrCH_(3)CHOoverset([O])rarrCH_(3)COOH`

Discussion

394.	The oxidation of benzene by `V_(2)O_(5)` in the presence of aire producesA. Malic acidB. Maleic acidC. Maleic anhydrideD. none of these
Answer» Correct Answer - C

Discussion

395.	Toluene reacts with chromyl chloride to form :A. BenzaldehydeB. Benzoic acidC. ChlorobenzeneD. none of these
Answer» Correct Answer - A

Discussion

396.	Write any two test for alkenes
Answer» Rapid decolourisation of bromine in CCl₄ without evolution of hydrogen bromide. Decolourisation of cold dilute aqueous solution of KMnO₄

Discussion

397.	Mention the uses of alkenes.
Answer» Alkenes are used as starting material in the synthesis of alcohols, plastics, detergents and fuels. Ethenc is the most important organic fcedstock in the polymer industry. Examples are, PVC, Sarans and Polythene. These polymers are used in the manufacture of floor tiles, shoe-soles, synthetic fibres, raincoats, pipes etc

Discussion

398.	What is peroxide effect?
Answer» The addition of HBr to an alkene in the presence of organic peroxide gives the antì-Markovnikofl’s product. This effect is called as peroxide effect.

Discussion

399.	Peroxide effect is not observed in ……….. (a) HCl (b) HI (c) HBr (d) Both (a) and (b)
Answer» (d) Both (a) and (b)

Discussion

400.	The correct IUPAC name of the following alkane is(i) 3,6 – Diethyl – 2 – methyloctane(ii) 5 – Isopropyl – 3 – ethyloctane(iii) 3 – Ethyl – 5 – isopropyloctane(iv) 3 – Isopropyl – 6 – ethyloctane
Answer» (i) 3,6 – Diethyl – 2 – methyloctane

Discussion

Explore topic-wise InterviewSolutions in .

`(CH_(3))_(2)C=CHCH_(3)+NOBr rarr` Product . The structure of the product isA. `(CH_(3))_(2)C(NO)-CH(Br)CH_(3)`B. `(CH_(3))_(2)C(Br)-CH(NO)CH_(3)`C. `(CH_(3))_(2)CH-C(NO)(Br)CH_(3)`D.

The major product obtained on treatment of `CH_(3) CH_(2)CH(F)` `CH_(3)with CH_(3)O^(-)//CH_(3)OH` is .A. `CH_(3)CH_(2)CH(OCH_(3))CH_(3)`B. `CH_(3)CH=CHCH_(3)`C. `CH_(3)CH_(2)CH=CH_(2)`D. `CH_(3)CH_(2)CH_(2)OCH_(2)`

Given below, catalyst and corresponding process/reaction are matched. The mismatch isA. `[RhCl(PPh_(3))_(2):` HydrogenationB. `TiCl_(4)+Al(C_(2)H_(5))_(3):` PolymerizationC. `V_(2)O_(5):` Haber`-` Bosch processD. Nickel `-` Hydrogenation

The reaction between benzene and ICI in presence of anhyd. `AICI_3` yields _____

Among the following , the most stable conformation of n-butane isA. B. C. D.

Which of the following compounds will exhibit geometrical isomerism ?A. 2-Phenyl-1-buteneB. 1,1-Diphenyl-1-propeneC. 1-Phenyl-2-buteneD. 3-Phenyl-1-butene

An alkene is formed from a carbocation byA. Elimination of a `H^(+)` ionB. Elimination of `H^(-)` ionC. Addtion of a `H^(+)` ionD. Addition of a `H^(-)` ion

Geometrical isomerism is causedA. by restricted rotation around C=C bondB. by the presence of one asymmetric carbon atomC. due to the differennt groups attached to the same functional groupD. by swing of hydrogenn atom between two divalent atoms.

Benzene on ozolysis yields.A. GlyoxalB. AcetoneC. EthanolD. Methanol

The most reactive hydrocarbon isA. EtheneB. EthyneC. EthaneD. Methane

Hydration of acetylene to ethanal is catalysed byA. `Ba^(2+)`B. `Na^(+)`C. `Li^(+)`D. None

Each of the following alkul halide reacts with sodium metal in presnce of ether to form alkane exceptA. `CH_(3)Cl`B. `CH_(3)CH_(2)Cl`C. `CH_(3)-underset(CH_(3))underset(|)(CH)-Cl`D. `(CH_(3))_(3)C Cl`

The o,p-directing byt deactivating group isA. `-NH_(2)`B. `-OH`C. R-(alkyl)D. X-(halogen)

The function of CaO in the reaction `RCO_(2)^(-) underset("Heat")overset(NaOH+CaO)to` isA. that of a catalystB. that of a dehydration agentC. that of a drying agentD. that of a nucleophilic agent.

The main product produced in the dehydrohalogenation of 2-bromo-3,3-dimethylbutane is:A. 3,3-dimethylbuteneB. 2,3-dimethylbuteneC. 2,3-dimethylbut-2-eneD. 4-methylpent-2-ene

When but-I-yne is treated with excess of HBr the expected product isA. 1,2-DibromobtutaneB. 2,3-DibromobutaneC. 1,1-DibromobutaneD. All of these

But-1-yne can be converted into 1-bromo-1-butene by reacting it with which of the following reagent?A. HBrB. HBr and `C_(6)H_(5)COO_(2)`C. `Br_(2) and H_(2)O_(2)`D. `Br_(2) and C Cl_(4)`

The hydrocarrbon which gives benzene on passing through a red hot iron tube isA. `CH_(4)`B. `C_(2)H_(2)`C. `C_(2)H_(4)`D. `C_(2)H_(6)`

The reactioin of HBr with `CH_(3)C-undeA. `CH_(3)underset(CH_(3))underset(|)(CBr)-CH_(3)`B. `CH_(3)CH_(2)CH_(2)CH_(2)-Br`C. `CH_(3)-underset(CH_(3))underset(|)(CH)-CH_(2)Br`D. `CH_()CH_(2)-underset(Br)underset(|)(C)-H-CH_(3)`

Write IUPAC name of the following

In the alkane `H_3C-CH_(2)-C(CH_(3))_2-CH_(2)-CH(CH_(3))_2`, identify `1^(@),2^(@),3^(@),` carbon atoms and give the number of H atoms bonded to each one of these.

What is the major product obtained when 2-bromobutane is heated with alcoholic KOH? Write only the major product expected to be obtained.

In the reaction , `C_2H_5Br underset((ii)CuI)overset((i)Li)to "(X)" overset(CH_3Br)to (Y) `, the products X and Y are ________ and ____________ respectively.

How many products will be formed in this reaction? A. `10`B. `2`C. `3`D. `4`

Those groups which activate the benzene ring are generallyA. o-directingB. p-directingC. o-and m-directingD. o-and p-directing.

Which among the following is a non-planar molecule?A. B. C. D.

What does circle inside the benzene ring indicate?

Suggest the name of a Lewis acid other than anhydrous aluminium chloride which can be used during ethylation of benzene.

Suggest the name of Lewis acids other than anhydrous aluminium chloride which can be used during ethylation of benzene.

In the presence of peroxide, addition of HBr to prepare propene takes place according to anti Markovnikov's rule but peroxide effect is not seen in the case of HCl and HI. Explain.

Name two tests to test the presence of double bond in a compound.

The addition of HCl in presence of peroxide does not follow anti-Markownikov’s rule because ………….. (A) HCl bond is too strong to be broken homolytically (B) Cl atom is not reactive enough to add on to a double bond (C) Cl atom combines with H atom to form HCl (D) HCl is a reducing agent

What are meta directing groups. Give examples.

What is the chief product of reaction between `beta`-butylene chloride and alc. KOH/`NaNH_(2)`A. 1,2-butadieneB. 1,3-butadieneC. 2-butyneD. 1-butyne

Consider the following reaction. Which of the following base will give the best yield of the alkene II as the major product?A. `CH_(3)O^(-)`B. `C_(2)H_(5)O^(-)`C. `(CH_(3))_(3)CO^(-)`D. `(C_(2)H_(5))_(3)CO_(-)`

Acetylene is used in the large scale production ofA. PolytheneB. Vinyl chlorideC. Ethyl alcoholD. Benzene

The most volatile alkane is:A. n-pentaneB. isopentaneC. neopentaneD. n-hexane

The oxidation of benzene by `V_(2)O_(5)` in the presence of aire producesA. Malic acidB. Maleic acidC. Maleic anhydrideD. none of these

Toluene reacts with chromyl chloride to form :A. BenzaldehydeB. Benzoic acidC. ChlorobenzeneD. none of these

Write any two test for alkenes

Mention the uses of alkenes.

What is peroxide effect?

Peroxide effect is not observed in ……….. (a) HCl (b) HI (c) HBr (d) Both (a) and (b)

The correct IUPAC name of the following alkane is(i) 3,6 – Diethyl – 2 – methyloctane(ii) 5 – Isopropyl – 3 – ethyloctane(iii) 3 – Ethyl – 5 – isopropyloctane(iv) 3 – Isopropyl – 6 – ethyloctane

In the reaction , `C_2H_5Br underset((ii)CuI)overset((i)Li)to "(X)" overset(CH_3Br)to (Y) `, the products X and Y are and ____ respectively.