Question # 1

Alkene general formula :

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C_nH_2n+2

C_nH_2n

C_nH_2n-2

C_nH_2n+1

Alkyl benzenes are readily oxidized by axidfied

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KMnO₄

K₂CO₃

MnO₄

H₂SO₄

Alkenes normally have ______ geometry

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Tetrachedral

Linear

Planer

None

The empirical formula of benzene is determined by

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IR spectra

U.V

Elemental analysis

NMR spectra

Ethylene decolorizes cold dilute solution of KMnO₄. This test is known as

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Colouration test

Baeyer's test

Silver mirror test

Ring test

The saturated hydrocarbons usually end with suffix ______

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Ane

Ene

Yne

Oic

Which of the following possesses the highest melting point?

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Chlorobenzene

0-Dichlorobenzene

m-Dichlorobenzene

p-Dichlorobenzene

Which one does not declourized KMnO₄

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Alkenes

Alkynes

Bezene

All above

All are ortho & Para directing except

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X

OH

NR₃

NH₂

The stability of acromatic compounds decreases with ------- in the no. of its resonance structure

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Decrease

Increase

Remain constant

Partially decreases

Which one of the following gases is used for artificial ripening of fruits

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Ethane

Ethyne

Methane

Propane

Octane number is zero for

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n-Heptane

Isooctane

n-Hexane

Isoheptane

Alkanes are gases :

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C₁-C₄

C₅-C₁₀

C₁₁-C₁₅

C₁₀-C₂₀

Which one of the following gases is used for artificial ripening of fruits ?

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Ethane

Ethyne

Methane

Propane

Reaction of ethanes with KMnO₄gives:

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Ozonide

Glyoxal

Glycol

Oxalic acid

Incomplete oxidation of alkanes yields

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CO₂& carbon black

CO₂+ heat

CO and carbon black

CO + heat

Sulphuric acid generates nitronium ion by reacting with

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Nitric acid

Nitrogen gas

Nitrous acid

Potassium nitrate

Benzene has a -------- structure

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Pentagonal

Hexagonal

Heptagonal

Tetragonal

The temp. used for the hydrogenation of alkenes using Ni is

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2000°C

400°C

200-- 300°C

1000°C

Write the name of following alkene CH₂= CH - CH = CH₂

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1,3 butadiene

Butra -1, 3-diene

Both a & b

None

Hydrocarbon which is liquid at room temperature is

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Pentane

Butane

Propane

Ethane

Boiling point of n-butane is:

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-102°C

-75°C

-55°C

55°C

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

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1892

1830

1947

1979

Which of the following is not an ortho-para directing group

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Which of the following is not an electrophitic substitution reaction of benzene

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Nitration

Sulphonation

Fridel-Craft alkylation

Free radical chlorination of benzene

Benzene was discovered by Michael Faraday's in

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1824

1825

1826

1827

Which of the following decolorized Br₂-water

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Methane

Ethane

Ethene

Propane

If we remove one hydrogen atom from an alkane we obtain a group called

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Acetyle group

Formyle group

Alkyle group

Ketyle group

acetylene can be converted into-while passing through a Cu-tube at 300°C:

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Glyoxal

Vinyl acetylene

Vinyl alcohol

Benzene

The C-C bond angles in benzene ring are

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119°

120°

121°

None

Which reaction is too vigorous to control

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Chlorination

Bromination

Iodination

Fluorination

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