Aliphatic Hydrocarbons

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1Hydrogenation of alkenes/alkynes in the presence of Ni as catalyst at 300 degree Celcius results in the formation of corresponding alkanes. This reaction is known as( )Kolbe's reaction

( )Cannizaro's reaction

( )Haloform resction

( )Sabatier-senderens reaction

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2Water gas is produced by treating methane with( )H2SO4

( )NaOH

( )H2O

( )HCl

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3Alhyl halides when reduced with nascent hydrogen in the presence of Zn+HCl are converted to( )Alkenes

( )Alcohol

( )Alkanes

( )Alkynes

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4When an aqueous solution of potassium salt of monocarboxylic acid is subjected to electrolysis, corresponding alkane is formed. This reaction is known as( )Sabatier-senderens reaction

( )Cannizaro reaction

( )Kolbe's reaction

( )Alkylation

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5Ethylene can be prepared in the laboratory by heating together ethyl alcohol and ( )Phenol

( )H2SO4

( )HCl

( )HF

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6Alkenes combine readily with electrophilic reagents such as halogens giving( )Vicinal dihalides

( )Haloalkanes

( )Vinyl halides

( )Gem-dihalides

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7Ethyl hydrogen sulphate on hydrolysis with boiling water is converted to( )Methyl alcohol

( )Propyl alcohol

( )Ethylene

( )Ethyl alcohol

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8Ethylene combines with water in the presence of H2SO4 + HgSO4 and forms( )Ethyl chloride

( )Ethyl alcohol

( )Carboxylic acid

( )None of these

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9When ethene is passed through a dilute solution of KMnO4 the pink colour changes to( )Colourless

( )Red

( )Green

( )Blue

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10Ethylene polymerizes at 100 atm pressure and 400 degree Celsius to give( )Polyalcohol

( )Polyethylene

( )Polybenzene

( )Polypropylene

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11Ethylene decolourizes dilute solution of KMnO4. This test is known as( )Silver mirror test

( )Colouration test

( )Ring test

( )Baeyer's test

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12Which gas is produced by treating CaC2 with water( )HCl

( )Methane

( )Ethane

( )Acetylene

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13Which gas is used for welding purposes( )Acetylene

( )Nitrogen

( )Methane

( )Butane

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14Acetylene is used in the manufacture of( )Rubber

( )Plastic

( )Ethyl alcohol

( )All these

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15When n-hexane is heated in the presence of Pt at 500 degree celsius, it cyclists to give( )Cyclohexene

( )Benzene

( )Toulene

( )Cyclohexane

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16Formula of chloroform is( )CHCl3

( )CH2Cl2

( )CCl4

( )CH3Cl

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17Vinyl acetylene combines with HCl to form( )Divinylacetylene

( )Poly acetylene

( )Chloroprene

( )Benzene

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18The addition of unsymmetrical reagent to an unsymmetrical alkene is in accordance with( )Hund's rule

( )Markownikov's rule

( )Pauli's exclusion principle

( )Auf bau principle

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19Synthetic rubber is made by polymerization of( )Chloroform

( )Divinylacetylene

( )Acetylene

( )Butene

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20Beta-beta`-dichloroethyl sulphide is commonly known as( )Laughing gas

( )Mustard gas

( )Bio-gas

( )Phosgene gas

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21When methane reacts with Cl2 in the presence of diffused light the product obtained is/are( )Chloroform

( )Carbon tetrachloride

( )Chloromethane and dichloromethane

( )Mixture of all these

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22Which of the following compounds will not decolourize bromine water( )Ethene

( )Propene

( )Butane

( )Ethyne

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23Which of the following reagents distinguishes ethylene from acetylene?( )Aqueous alkaline KMnO4

( )Conc.H2SO4

( )Hydrogenation

( )Ammonical cuprous chloride

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24When a compound X is passed through a dilute alkaline solution of KMnO4 the pink colour of solution is discharged. The compound X is possibly( )Methane

( )Ethene

( )Benzene

( )Ethane

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25Acetylene gives( )White ppt. with ammonical AgNO3 and red ppt. with ammonical Cu(NO3)2

( )White ppt. with ammonical AgNO3 and red ppt. with ammonical Cu2Cl2

( )White ppt. with both

( )Red ppt. with both

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26The order of reactivity of halogens in aliphatic substitution reactions is( )F2>Br2>Cl2

( )Cl2>Br2>F2

( )Br2>Cl2>F2

( )Cl2>F2>Br2

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27Which of the following substances is used as an antiknock compound? ( )Lead tetrachloride

( )Lead acetate

( )Ethyl acetate

( )Tetraethyl lead

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28The IUPAC name for compound having the formula (CH3)3C-CH=CH2 is( )3,3-Dimethyl-1-butene

( )1,1,1-Trimethyl-3-propene

( )1,1-Dimethyl-3-butene

( )3,3,3-Trimethyl-1-propene

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29For preparing an alkane, a concentrated aqueous solution of sodium or potassium salt of saturated carboxylic acid is subjected to( )Oxidation

( )Electrolysis

( )Hydrolysis

( )Hydrogenation

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30In Friedal-Craft's alkylation besides AlCl3 the other reactants are( )C6H6+CH4

( )C6H6+CH3Cl

( )C6H6+NH3

( )C6H6+CH3COCl

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31The addition of HBr is easiest with( )CH2=CHCl

( )CH3-CH=CH2

( )ClCH=CHCl

( )(CH3)2C=CH2

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32Which of the following method is most appropriate for the manufacture of methane?( )By reduction of CH2Cl2

( )Wurtz reaction

( )Liquefication of natural gas

( )None of these

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33A fuel has a same knocking property as a mixture of 70 isoctane (2,2,4-trimethyl pentane) and 30% n-heptane by volume. The octane number of the fuel is ( )50

( )70

( )40

( )100

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34Hydrocarbon which is liquid at room temperature is( )Propane

( )Ethane

( )Pentane

( )Butane

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35An organic compound on treatment with Br2 in CCl4 gives bromoderivative of an alkene. The compound will be( )CH3-CH=CH2

( )HC=_CH

( )CH3CH=CHCH3

( )H2C=CH2

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36A salt producing hydrocarbon among these compounds is( )Ethane

( )Ethyne

( )Methane

( )Ethene

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37Marsh gas was the name given to( )Methane

( )Propane

( )Ethane

( )Butane

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38"Each different compound should have a different name" was published by IUPAC system of nomenclature in( )1979

( )1947

( )1892

( )1830

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39CH2=CH-CH=CH2 is( )1,3-butadiene

( )Buta-1,3-diene

( )Both a and b

( )None

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40CnH2n is the general formula of( )Alkanes

( )Alkenes

( )Alkynes

( )None of the above

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41During preparation of alkanes the hydrogenation of alkenes or alkynes the catalyst must be( )Al2O3

( )H2SO4

( )Ni

( )Fe2O3

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42An alkane is produced when an alkyl halide reacts with zinc in the presence of( )HCl

( )CH3COOH

( )Both a and b

( )None of these

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43The method in which alkanes prepared by alkyl halides in the presence of palladium-charcoal is( )Electrolysis

( )Hydrolysis

( )Hydrogenolysis

( )Hydrogenation

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44Kolb's method of alkane production is actually( )Catalysis

( )Hydrogenation

( )Hydrolysis

( )Electrolysis

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45Kolbe's method is not useful for the production of( )Methane

( )Butane

( )Propane

( )Ethane

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46Kolbe's method has limited synthesis applications due to( )Slow reaction

( )Expensive catalysis

( )Salts used are very expensive

( )Number of side products produced

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47The reaction in which ketone is reduced to the alkane is called( )Kolb

( )Clemmensen

( )Cannizaro

( )None

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48The method used only for the production of symmetrical alkanes( )Wolf kishner

( )Clemmensen

( )Cannizzaro

( )Kolbe's method

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49Alkanes containing carbons C18 onwards are( )Liquids

( )Gases

( )Solids

( )Waxy solids

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50Physical properties of alkanes increase with increase of all physical constants except( )Melting points

( )Density

( )Boiling points

( )Solubility

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51The unreactivity of alkanes is based upon( )Inertness of sigma bonds

( )Non-polarity of the bonds

( )Both a and b

( )None of these

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52Complete combustion of alkanes yield( )CO+H2O+heat

( )CO2+H2O+heat

( )CO2+heat

( )CO2+H2O

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53The major reaction occuring in the engines of automobiles is( )Combustion

( )Reduction

( )Oxidation

( )Decomposition

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54Incomplete oxidation of alkanes yields( )CO2+heat

( )CO+heat

( )CO2 and carbon black

( )CO and carbon black

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55Catalytic oxidation of alkanes is used for the preparation of( )Ketones

( )Aldehydes

( )Caboxylic acids

( )Fattyi acids

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56The order of reactivity of halogen acids towards alkenes( )HCl>HBr>HI

( )HBr>HCl>HI

( )HI>HBr>HCl

( )HCl>HBr

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57Raney-nickel is the alloy of Ni with( )Pd

( )Pt

( )Cu

( )Al

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58Mustard gas is a( )High melting liquid

( )High boiling liquid

( )Gas

( )Steam

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59During the preapration of alkynes the active metals that react with tetra halo-alkanes are( )Zn

( )Mg

( )Both a and b

( )None

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60Alknes are colourless and odourless except( )Pentyne

( )Acetylene

( )Propyne

( )Butyne

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61The alkynides are used for the _________of alkynes( )Preparation

( )Purification

( )Separation

( )All the above

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62Common name of CH3-C=_CH is( )Allylene

( )Propargylene

( )Propyne

( )Allyl

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63Ammonical silver nitrate reacts with( )Ethylene

( )Benzene

( )Ethyne

( )2-butyne

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64Ozonolysis of 2-methyl butene-2 yields ( )Aldehyde

( )Ketone

( )Both aldehyde and ketone

( )None of these

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65Which of the following will have least hindered rotation about carbon-carbon bond( )Acetylene

( )Hexachloroethene

( )Ethane

( )Ethylene

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66Propyne and propene can be distinguished by( )Br2 and CCl4

( )Dil.KMnO4

( )Conc.H2SO4

( )AgNO3 in ammonia

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67The compound which reacts with HBr according to Markonikoff's rule is( )H2C=CH2

( )H3C-CH=CH-CH3

( )(CH3)2C=CH2

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68A metallic carbide on treatment with water gives out a colorless gas, which burns in air readily and gives a red precipitate with Cu2Cl2 and NH4OH. The gas is( )CH4

( )C2H4

( )C2H6

( )C2H2

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69A sample of petrol has the same knocking characteristic as a 60 mL mixture of isooctane and n-heptane mixed in 2:1 (V/V). What is the octane no. of te petrol sample( )66.6

( )76.6

( )86.6

( )56.6

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70Which one of the following is the strongest acid( )HC=_CH

( )C2H4

( )C2H6

( )C6H6

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71When cyclohexane is proved on water, it floats because( )It is crown form

( )It is boat form

( )It is chair form

( )None of these

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72Which one of the following has the smallest heat of hydrogenation per mole( )2-butene

( )Propene

( )1,3-butadiene

( )1-butene

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73The most strained cyclo alkane is( )Cyclopentane

( )Cyclopropane

( )Cyclohexane

( )Cyclobutane

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74Which one is not a hydrocarbon( )Antheracene

( )Naphthalene

( )Chloroform

( )Phenanthrene

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75Solid CH4 and benzene are _______solids.( )Molecular

( )Covalent

( )Amorphous

( )Ionic

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76CH3COONa + NaOH-------->CH4 + Na2CO3. This reaction is called( )Methanation reaction

( )Decarboxylation

( )Acid hydrolysis

( )Base hydrolysis

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77CH3 + CH3------>CH3-CH3 is called _________step of chemical reaction( )Endothermic

( )Initiation

( )Propagating

( )Termiinating

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78Ethyl alcohol on ________gives ethene.( )Oxidation

( )Dehdrogenation

( )Hydration

( )Dehydration

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79When H2SO4 is heated with excess of ethanol at 140 degree celsius. The major product is( )Alcohol

( )Ether

( )Ethene

( )Ketone

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80Which one decolourizes Bayers reagent and bromine water( )Ethene

( )Ethyne

( )Both a and b

( )Benzene

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81Metallic ethynides are formed by the reaction of _________with ammonical silver nitrate or ammonical cuprous chloride.( )Benzene

( )Ethene

( )Acetylene

( )Ethanoic acid

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82Which statement is true regarding reactivity( )Alkenes do not undergo addition reactions

( )Towards the addition reaction alkenes are more reactive than alkynes

( )Alkenes decolourize bromine solution and Baeyer's reagent but alkynes do not

( )Double bond is stronger than single bond hence alkenes are less reactive than alkanes

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83Reaction of 2-butene with HBr gives only one product because( )The molecule is symmetrical around C=C bond

( )The molecule is asymetrical around C=C bond

( )It is more stable

( )It is less stable

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84Reaction of Br2 with Ethene is an example of ____________reaction( )Nucleophilic addition

( )Electrophilic substitution

( )Electrophilic addition

( )Free radical addition

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85Bromoethane can be converted to ethene by( )Reaction with aq.KOH

( )Oxidation

( )Reduction

( )Reaction with alcoholic KOH

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86During pyrolysis which bond will break rapidly( )C-H

( )C=C

( )C-C

( )C=_C

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87Ozonolysis of ethene produces( )Ether

( )Ketone

( )Aldehyde

( )Mixture of a and b

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88Ozonolysis reaction with an alkene produces one mole of HCHO and CH3CHO each. What is the name of this alkene?( )Butylene

( )Propylene

( )Pentene

( )Ethylene

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89Which alkene on acid catalysed hydration forms t-butyl alcohol?( )CH3CH=CH-CH3

( )CH3-CH=CH2

( )CH3CH2CH=CH2

( )CH3-C(CH3)=CH2

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