Question # 1

During nitration of benzene, the active nitrating agent is

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NO3

NO2+

NO2-

HNO3

Alkanes are least reactive towards:

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Acids and bases

Reducing agents

Oxidizing agents

All of these

Which can be used for dehydration of alcohol

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P₄O₁₀

H₂SO₄

H₃PO₄

All of them

Alkynes are colourless & odouless except

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Acetylene

Propyne

Butyne

Pentyne

β-β- dichloroethyle sulphide is commonly known as:

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Mustared gas

Laughing gas

Phosgene gas

Bio gas

An alkane is produced when an alkyle halide reacts with zinc in the presence of

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HCl

CH₃COOH

Both a & b

None

Benzene does not undergo polymerization and it is also resistant to

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Reduction

Oxidation

Alkylation

Ozonolysis

Hybridization in alkanes is:

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sp

sp²

sp³

dsp²

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

Write the name of following compound

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5 - methyle - 2- hexene

2 - methyle hexene

4 - ethyle - 2 - methyle hexene

3 - ethyle - 3 - methyl hexene

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

The alkynides are used for the ----------- of alkynes

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Pxperation

Purification

Seperation

All of above

Substitution of halogen in the benzene ring requires catalyst

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AlCl₃

FeCl₃

SiO₂

Organo - nickel

Alkanes are gases :

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C₁-C₄

C₅-C₁₀

C₁₁-C₁₅

C₁₀-C₂₀

Vinyl acetylene combines with HCI to form

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Poly acetylene

Benzene

Chloroprene

Divinylacetylene

The presence of a double bond in a compound in the sign of:

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Saturation

Unsaturation

Subsitution

None

The nitration of benzene takes place when it is heated with a mixture of conc.HNO₃and conc. H₂SO₄at 50°C in ratio of

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1 : 2

1 : 1

1 : 3

2 : 1

Which decolourizes the colour of Br₃

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CH₄

CH_3-CH₃

CH_3-CH_3-CH₃

CH₂₌CH₂

Alkanes are soluble in all except

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Benzene

Ether

Water

Carbon tetra chloride

The hydrocarbons having double bonds normally end with suffix

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Ane

Ene

Yne

Oic

Eletronegativity difference in C-C bond in alkanes is:

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Zero

Double

Half

4.0

Formula of chloroform is

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CH₃CI

CCI₄

CH₂CI₂

CHCI₃

Alkenes normally have ______ geometry

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Tetrachedral

Linear

Planer

None

In CH₄, all the H-C-H bond angles are

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120°

107°

109°

109.5°

Which is more active ?

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Alkanes

Alkenes

Alkynes

Benzene

The addition of unsymmetrical reagent to an unsymmetrical alkene is in accordance with the rule

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Hund's rule

Markowvikov's rule

Pauli's exclusion principle

Auf ban principle

All are ortho & Para directing except

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X

OH

NR₃

NH₂

The compound prepared by a substitution reaction of benzene is

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Acetophenone

Glyoxal

Cyclohexame

Hexabromo cyclohexane

Hydrocarbon which is liquid at room temperature is

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Pentane

Butane

Propane

Ethane

Raney - nickel is the alloy of Ni with

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Pt

Al

Cu

Pd

Which of the following method is most appropriate for the manufacture of methane?

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By reduction of CH2CL2

Wurtz reaction

Liquification of natural gas

None of these

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