Hydrocarbons Test 1

Total Questions:50 Total Time: 75 Min

Remaining:

 

Questions 1 of 50

Question:In the preparation of Grignard reagent from haloalkane, the metal

Answers Choices:

Mg

Zn

Li

K

Questions 2 of 50

Question:Sodium acetate can be converted to ethane by

Answers Choices:

Heating with \(LiAl{H_4}\)

Electrolysing its aqueous solution

Heating with sodalime

Heating with calcium acetate

Questions 3 of 50

Question:Kerosene is used as fuel because it is

Answers Choices:

Less volatile

More volatile

Cheap

Abundantly available

Questions 4 of 50

Question:\(C{H_3} - C{H_2} - C{H_2} - C{H_3}\mathop \to \limits^{HBr} \Pr oduct\). Product in above reaction is

Answers Choices:

\(C{H_3} - \mathop {\mathop {CH\,}\limits_{|\,\,\,\,\,\,\,\,} }\limits_{Br\,\,\,} - C{H_2} - C{H_3}\)

\(C{H_3} - \mathop {\mathop {CH}\limits_{|\,\,\,\,\,\,} }\limits_{C{H_3}} - C{H_3}\)

\(\mathop {\mathop {C{H_2}}\limits_{\,\,|\,\,\,\,\,\,\,\,\,\,} }\limits_{Br\,\,\,\,} - C{H_2} - \mathop {\mathop {C{H_2}}\limits_{|\,\,\,\,\,\,\,\,} }\limits_{C{H_3}} \)

All of these

Questions 5 of 50

Question:Petroleum ether can be used as

Answers Choices:

Solvent for fat, oil, varnish and rubber

As a fuel

Both 1 and 2

None of these

Questions 6 of 50

Question:Which of the following are produced from coaltar

Answers Choices:

Synthetic dyes

Drugs

Perfumes

All the three

Questions 7 of 50

Question:The organic compound used as antiknock agent in petroleum is

Answers Choices:

\({({C_2}{H_5})_4}Pb\)

TNT

\(C{H_3}MgBr\)

\({({C_2}{H_5})_2}Hg\)

Questions 8 of 50

Question:In catalytic reduction of hydrocarbons which catalyst is mostly used

Answers Choices:

Pt /Ni

Pd

\(Si{O_2}\)

Misch Metal

Questions 9 of 50

Question:A sample of gasoline contains 81% iso-octane and 19% n-heptane. Its octane number will be

Answers Choices:

19

81

100

62

Questions 10 of 50

Question:The natural petroleum contains

Answers Choices:

Saturated hydrocarbons

Cyclic saturated hydrocarbons

Compounds of sulphur

All of these

Questions 11 of 50

Question:A liquid hydrocarbon can be converted to gaseous hydrocarbon by

Answers Choices:

Cracking

Hydrolysis

Oxidation

Distillation under reduced pressure

Questions 12 of 50

Question:The tetrahedral nature of carbon was first given by

Answers Choices:

Kekule

Le Bel and Van't Hoff

Pauling

Armstrong and Bayer

Questions 13 of 50

Question:Gasoline is a mixture of alkanes with the number of carbon atoms

Answers Choices:

\({C_3} - {C_5}\)

\({C_5} - {C_6}\)

\({C_6} - {C_8}\)

\({C_7} - {C_9}\)

Questions 14 of 50

Question:The final product of complete oxidation of hydrocarbons is

Answers Choices:

Acid

Aldehyde

\({H_2}O + C{O_2}\)

Dihydric alcohol

Questions 15 of 50

Question:By Wurtz reaction, a mixture of methyliodide and ethyliodide gives

Answers Choices:

Butane

Ethane

Propane

A mixture of the above three

Questions 16 of 50

Question:Product obtained by nitration of propane is

Answers Choices:

Nitropropane

Nitromethane

Nitroethane

All of these

Questions 17 of 50

Question:B.P. of branched chain alkanes as compared to straight chain alkanes are

Answers Choices:

Lower

Equal

Higher

Independent of the chain

Questions 18 of 50

Question:Daily use candles (paraffin wax) contain

Answers Choices:

Higher saturated hydrocarbon

Lower saturated hydrocarbon

Higher unsaturated hydrocarbon

Lower unsaturated hydrocarbon

Questions 19 of 50

Question:C-H bond length is greatest in

Answers Choices:

\({C_2}{H_2}\)

\({C_2}{H_4}\)

\({C_2}{H_6}\)

\({C_2}{H_2}B{r_2}\)

Questions 20 of 50

Question:Which one of the following compounds does not form an ozonide

Answers Choices:

Ethene

Propyne

Propene

Propane

Questions 21 of 50

Question:Which of the following is a good conductor of heat of electricity

Answers Choices:

Diamond

Graphite

Anthracite

Charcoal

Questions 22 of 50

Question:Which one of the following has the minimum boiling point

Answers Choices:

1-Butene

1-Butyne

n-Butane

Isobutane

Questions 23 of 50

Question:The propene reacts with HBr to form

Answers Choices:

Ethane

Hexane

1-bromo-propane

2-bromo propane

Questions 24 of 50

Question:Ethylene may be obtained by dehydration of which of the following with concentrated \({H_2}S{O_4}\) at \(160 - {170^o}C\)

Answers Choices:

\({C_2}{H_5}OH\)

\(C{H_3}OH\)

\(C{H_3}C{H_2}C{H_2}OH\)

\({(C{H_3})_2}CHC{H_2}OH\)

Questions 25 of 50

Question:Aqueous sulphuric acid reacts with 2-methyl-1-butene to give predominantly

Answers Choices:

Isobutyl hydrogen sulphate

2-methyl-2-butanol

2-methyl-1-butanol

Secondary butyl hydrogen sulphate

Questions 26 of 50

Question:How can ethene be produced from ethanol

Answers Choices:

By dehydrohalogenation

By dehydrogenation

By dehydration with conc. \({H_2}S{O_4}\) at \({170^o}C\)

By reduction with hydrogen iodide

Questions 27 of 50

Question:Cyclopentene on treatment with alkaline \(KMn{O_4}\) gives

Answers Choices:

Cyclopentanol

trans 1, 2-cyclopentanediol

cis 1, 2-cyclopentanediol

1 : 1 mixture of cis and trans 1, 2-cyclopentanediol

Questions 28 of 50

Question:Which of the following is the most stable alkene

Answers Choices:

\({R_2}C = C{R_2}\)

\(RCH = CHR\)

\(RC{H_2} = C{H_2}R\)

\(C{H_2} = C{H_2}\)

Questions 29 of 50

Question:During debromination of meso-dibromobutane, the major compound formed is

Answers Choices:

n-butane

1-butane

cis-2-butene

trans-2-butene

Questions 30 of 50

Question:What product is formed when 1-chlorobutane react with alcoholic KOH

Answers Choices:

1-butene

2-butene

1-butanol

2-butanol

Questions 31 of 50

Question:Ethylene is converted to X on passing through a mixture of an acidified aqueous solution of palladium chloride and cupric chloride. Which of the following reagents readily take part in addition reaction with X

Answers Choices:

\(B{r_2}\)

HBr

HCl

HCN

Questions 32 of 50

Question:Addition of HCl does not obey antimarkownikoff's rule because

Answers Choices:

It is a strong acid

It is a gas

Its bond energy is high

Its bond energy is less

Questions 33 of 50

Question:The final product formed by the ozonolysis of compound \(RCH = C{R_2}\) is

Answers Choices:

RCHO

\({R_2}CO\)

Both 1 and 2

None of these

Questions 34 of 50

Question:Presence of peroxides affects the addition of

Answers Choices:

HBr

HCl

HI

All of these

Questions 35 of 50

Question:The reaction \(C{H_2} = C{H_2} + {H_2} \to C{H_3} - C{H_3}\) is called

Answers Choices:

Wurtz's reaction

Kolbe's reaction

Sabatier and Senderen's reaction

Carbylamine reaction

Questions 36 of 50

Question:An alkene given two moles of HCHO, one mole of \(C{O_2}\)and one mole of \(C{H_3}COCHO\)on ozonolysis. What is its structure

Answers Choices:

\(C{H_2} = C = CH - C{H_2} - C{H_3}\)

\(C{H_2} = CH - \mathop {\mathop {CH\, - }\limits^{\,\,|\,\,\,\,\,\,\,\,\,\,\,} }\limits^{C{H_3}} CH = C{H_2}\)

\(C{H_2} = C = \mathop {\mathop {C\, - \,}\limits_{|\,\,\,\,\,\,\,\,} }\limits_{C{H_3}} C{H_3}\)

\(C{H_{2\,}} = C = \mathop {\,\mathop {C\,\,\, - \,}\limits^{|\,\,\,\,\,\,\,\,\,\,\,} }\limits^{C{H_3}} CH = C{H_2}\)

Questions 37 of 50

Question:The product obtained, heating ethanol with conc. \({H_2}S{O_4}\)at \({165^o} - {170^o}\), is

Answers Choices:

\({({C_2}{H_5})_2}S{O_4}\)

\(C{H_2} = C{H_2}\)

\(C{H_3}COOH\)

\({C_2}{H_5}HS{O_4}\)

Questions 38 of 50

Question:A gas decolourised by \(KMn{O_4}\) solution but gives no precipitate with ammoniacal cuprous chloride is

Answers Choices:

Ethane

Methane

Ethene

Acetylene

Questions 39 of 50

Question:The shapes of methane, ethene and ethyne molecules are, respectively

Answers Choices:

Tetrahedral, planar and linear

Tetrahedral, linear and planar

Pyramidal, planar and linear

Tetrahedral, pyramidal and planar

Questions 40 of 50

Question:The C - H bond length is minimum in the bond formed by

Answers Choices:

sp - s overlapping (as in alkynes)

\(s{p^2} - s\) overlapping (as in alkenes)

\(s{p^3} - s\) overlapping (as in alkanes)

None of these

Questions 41 of 50

Question:The distinguishing test for triple bond containing acidic hydrogen is

Answers Choices:

\(Ag{(N{H_3})_2}^ + \)

\(B{r_2}\)in \(CC{l_4}\)

Alkaline\(KMn{O_4}\)

\(AlC{l_3}\)

Questions 42 of 50

Question:Triple bond of ethyne is made of or Cylindrical shape of an alkyne is due to

Answers Choices:

Three \(\sigma - {\rm{bonds}}\)

Three \(\pi - {\rm{bonds}}\)

Two \(\sigma \) and one \(\pi - {\rm{bond}}\)

Two \(\pi \) and one \(\sigma - {\rm{bond}}\)

Questions 43 of 50

Question:Distinction in pentene-1 and pentyne-1 is done by

Answers Choices:

\({[Ag{(N{H_3})_2}]^ + }\)

Conc. \({H_2}S{O_4}\)

HCl

\(B{r_2}\)

Questions 44 of 50

Question:Shortest C-C bond length is present in

Answers Choices:

\(C{H_3} - C{H_2} - C{H_3}\)

\(C{H_3}C{H_2}C{H_2}C{H_3}\)

\(C{H_2} = CH - CH = C{H_2}\)

\(CH \equiv C - C \equiv CH\)

Questions 45 of 50

Question:The ratio of \(\sigma \) and \(\pi \) bonds in benzene is

Answers Choices:

2

4

6

8

Questions 46 of 50

Question:Benzene was discovered by

Answers Choices:

Ramsay

Dalton

Faraday

Priestley

Questions 47 of 50

Question:Which among the following is the strongest o, p-directing group

Answers Choices:

OH

Cl

\({C_6}{H_5}\)

Br

Questions 48 of 50

Question:Methyl group attached to benzene can be oxidised to carboxyl group by reacting with

Answers Choices:

\(F{e_2}{O_3}\)

\(AgN{O_3}\)

\(KMn{O_4}\)

\(C{r_2}{O_3}\)

Questions 49 of 50

Question:In chlorination of benzene, the reactive species is

Answers Choices:

\(C{l^ + }\)

\(C{l^ - }\)

\(C{l_2}\)

\(C{l_2}^ - \)

Questions 50 of 50

Question:Decreasing order of C-C bond length is (I) \({C_2}{H_4}\) (II) \({C_2}{H_2}\) (III) \({C_6}{H_6}\) (IV) \({C_2}{H_6}\)

Answers Choices:

IV > III > I > II

I > II > IV > III

II > I > IV > III

IV > I > III > II