.An example of cinjugated diene is1 4-Pentadiene
1.1 4-Pentadiene
2.1 5-Hexadiene
3.1 2-Butadiene
4.1 3-Pentadiene.
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.Different arrangement of atoms that can be converted into one another by rotation about single bonds are calledconformation
1.trans-isomers
2.conformation
3.enantiomers
4.None of these
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.In acetylene C-C-H bond angle is
1.144 degree
2.180 degree
3.90 degree
4.96 degree
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.In iso-octane (2 2-4-trimethylpentane) the number of primary hydrogen atoms is
1.12
2.15
3.13
4.14
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.In neopentane the number of primary carbon atoms are
1.4
2.3
3.2
4.1
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.Liquids whose molecules are held together by hydrogen bonds are called
1.associated liquids
2.aprotonic solvents
3.primary liquid
4.hydrated liquids
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.Optical activity in a compound can be detected by means of
1.voltmeter
2.potentiometer
3.ammeter
4.polarimeter
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.The no. of possible isomers of 1 2 dichloroethane are
1.2
2.3
3.4
4.infinite
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.The number of possible metamers of pentonone are513
1.5
2.1
3.3
4.6
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.The process of separating a racemic mixture into optical isomers is known as
1.dissolution
2.isomerisation
3.resolution
4.pasteurization
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.The tetrahedral nature of the carbon was given by
1.Vant Hoff
2.Lewis
3.Le-Bel and Vant Hoff
4.None of the above
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.The total no. of possible isomers of ethane are
1.10
2.20
3.4
4.infinite
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.Two or more compounds having the same number and kind of atoms and same molecular weight are called
1.isobars
2.isotones
3.isomers
4.isochors
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.What is not truen about homologous series ?
1.All the members have similar chemical properties
2.They have identical physical properties
3.They can be represented by a general formula
4.Adjacent members deiffer in molecular mass by 14.
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.Which of the following compounds has least dipole moment?
1.1 2-Dichlorobenzene
2.1 3-Dichlorobenzene
3.1 4-Dichlorobenzene
4.All have same dipole moment.
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.Which of the following compounds is chiral?
1.2 chloro 2 methyl butane
2.3 chloro hexane
3.2 chloro pentane
4.1-chloro pentane
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.Which of the following have zero dipole moment?
1.2 methyl propane
2.trans-2 butene
3.cis-2 butene
4.butane-1
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.Which of the following molecules does not contains any secondary hydrogen atom?
1.n-Pentane
2.neo-Pentane
3.neo-Hexane
4.iso-Pentane.
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A nucleophile is a
1.Lewis base
2.Lewis acid
3.neither a Lewis acid nor a Lewis base
4.both A & B
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Alcohols are isomeric with
1.ketones
2.ethers
3.amines
4.acids
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All the members of a homologous series have same
1.Molecular mass
2.Molecular formula
3.Empirical formula
4.General molecular formula.
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An electrophile is a/an
1.Lewis base
2.Lewis acid
3.electron deficient species
4.Both A and B
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Carbanions are isoelectronic with
1.ethers
2.alcohols
3.amines
4.carboxylic acids
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Carbocation (or carbonium ion) is
1.a set of carbon atoms
2.an electrophile
3.a free radical
4.a nucleophile
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Carbonium ions contain only??.electrons around the carbon core.2659
1.2
2.6
3.5
4.9
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Carboxylic acids are isomeric withacid anhydrides
1.amines
2.esters
3.aldehydes
4.acid anhydrides
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Chain isomers differ w.r.t.
1.position of substituent
2.position of functional group
3.chemical effect
4.root word
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Decomposition of a compound by the action of heat is known as
1.decomposition
2.knocking
3.smelting
4.pyrolysis
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Diastereomers are a pair
1.stereoisomers that cannot be separated from each other
2.stereoisomers that are not minor image of each other
3.stereoisomers that have identical chemical properties
4.stereoisomers that are minor image of each other
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Diethyl amine and methylk propylamines are
1.metamers
2.tautomers
3.dynamic isomers
4.optical isomers
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Diethyl amine and methylk propylamines areANSWER : : metamers
1.metamers
2.tautomers
3.dynamic isomers
4.optical isomers
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Geometrical isomerism exist due to the presence of
1.single bond between C and C
2.double bond between C and C
3.triple bond between C and C
4.All the above
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he IUPAC name of isoprene is
1.1 3-Butadiene
2.2-Methyl-1 3-butadiene
3.2-Methyl-1-butene
4.3-Methyl-1-butene.
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Hetrolytic fission results in the formation of
1.electrophile
2.free radicals
3.electrophile and nucleophile
4.electrons
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In 19. In iso-octane (2 2 4-trimethylpentane) the number of tertiary hydrogen atoms is
1.One
2.Two
3.Three
4.Four.
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In isopentane the number of secondary carbon atom is12
1.1
2.2
3.3
4.0
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In substitution reactions of tertiary halide the ionisation of halogen atom as negative ion is facilitated by
1.electron attracting group
2.electron repelling group
3.free radical
4.All the above
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In the case of o-chlorophenol there exist
1.intramolecular hydrogen bonding
2.intermolecular covalent bonding
3.no hydrogen bonding
4.both inter and intramolecular hydrogen bonding
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IUPAC name of propargyl alcohol is
1.Prop-2-yn-1-ol
2.Prop-2-en-1-ol
3.Prop-1-en-2-ol
4.Prop-1-yn-2-ol.
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Molecules that are not superimposable on their mirror images aresymmetric
1.achiral
2.symmetric
3.asymmetric
4.chiral
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Number of sec-H atoms in iso-butane is
1.1
2.9
3.4
4.none.
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Paraffins is the common name used for
1.Alkanes
2.Alkenes
3.Alkynes
4.Arenes.
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Sulphur trioxide isa base
1.a Lewis base
2.a base
3.nucleophile
4.an electrophile
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The forces between the molecules of a non-polar compounds arehybrid forces
1.Van der Walls forces
2.ionic bonding
3.hybrid forces
4.dipole forces
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The IUPAC name of allylene is
1.Propyne
2.Propene
3.2-Butyne
4.1-Butyne.
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The IUPAC name of crotyl chloride is
1.1-Chloro-1-butene
2.1-Chloro-2-butene
3.2-Chloro-2-butene
4.3-Chloro-1-butene.
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The IUPAC name of crotyl chloride is
1.1-Chloro-1-butene
2.1-Chloro-2-butene
3.2-Chloro-2-butene
4.3-Chloro-1-butene.
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The most volatile amongst the following is
1.p-nitrophenol
2.m-nitrophenol
3.o-nitrophenol
4.none of these
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The number of pi bonds in isoprene is2310.
1.2
2.3
3.1
4.0
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The secondary suffix in the IUPAC names of ketones is----
1.al
2.one
3.ol
4.oate.
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The tetrahedral nature of the carbon was given by
1.Vant Hoff
2.Lewis
3.Le-Bel and Vant Hoff
4.None of the above
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What is not true about homologous series?Adjacent members differ in molecular mass by 14.
1.All the members have similar chemical properties
2.They have identical physical properties
3.They can be represented by a general formula
4.Adjacent members differ in molecular mass by 14.
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Which of the following alkanes has neither secondary nor tertiary hydrogens?neo-Pentane.
1.iso-Butane
2.iso-Pentane
3.Pentane
4.neo-Pentane.
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Which of the following carbonium ions is the most stable?
1.triphenyl methyl
2.diphenyl methyl
3.benzyl
4.All the above
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Which of the following compounds contains maximum number of tertiary hydrogen atoms?
1.n-Hexane
2.2-2-Dimethylbutane
3.2 3-Dimethylbytene
4.2-Metylpentane.
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Which of the following has zero dipole moment ?
1.1-Butene
2.cis-2-Butene
3.trans-2-Butene
4.2-Methyl-1-propene.
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Which of the following is optically active?
1.isobutyl alcohol
2.sec butyl alcohol
3.tert butyl alcohol
4.p-butyl alcohol
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Which of the following is the functional isomer of methyl acetate?
1.Ethyl acetate
2.Propanoic acid
3.Ethyl formate
4.Propanone.
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Which of the following represents the iso-butyl radical ?
1.Ethane
2.Methane
3.Ethyne
4.Benzene.
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Which of the following type of isomerism is found in the members of the same homologous series?Metamerism
1.Functional isomerism
2.Position isomerism
3.Metamerism
4.None of these
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