Question # 1

The method used only for the production of symmetrical alkanes

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Kolb's method

Clemmenen

Cannizzaro

Wolf kishner

Benzene is not prepared from

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Acetylene

Phenol

Benzoic acid

Bromo benzene

Acetylene is used in the manufacture of

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Rubber

Plastic

Ethyle alcohol

All of these

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2-bromonitrobenzene

2-nitrobromobenzene

1-bromonitrobenzene

1-nitrobromobenzene

Boiling point of n-butane is:

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-102°C

-75°C

-55°C

55°C

Alkene general formula :

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C_nH_2n+2

C_nH_2n

C_nH_2n-2

C_nH_2n+1

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

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2000°C

400°C

200-- 300°C

1000°C

Alkynes are colourless & odouless except

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Acetylene

Propyne

Butyne

Pentyne

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

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Ethene

Ethane

Methane

Propane

In which one of the following compound rings are not fused together at ortho positions

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Phenanthrene

Naphthalene

Diphenyemethane

Anthracene

Which compound was recognized the parent member of aromatic compounds

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Aniline

Phenol

Benzene

Toluene

Synthesis rubber is made by polymerization :

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Chloroform

Acetylene

Divinyl acetylene

Butene

The electron releasing effect of methyl group is significant and it makes ring a good

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Electrophilic

Nucleophilic

Nucleophobic

Hydrophobic

De halogenatiion of tetrahalides happens in the presence of active metal like

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Zn

Mg

Both a and b

None of them

To differentiate isomers we use

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n-

iso-

neo

All of them

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

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100

70

50

40

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

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Alkanes are gases :

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C₁-C₄

C₅-C₁₀

C₁₁-C₁₅

C₁₀-C₂₀

Benzene does not undergo polymerization and it is also resistant to

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Reduction

Oxidation

Alkylation

Ozonolysis

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

All are ortho & Para directing except

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X

OH

NR₃

NH₂

When acetylene is passed through a copper tube at 300°C, it polymerizes to

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Polyacetylene

polyethylene

Benzene

None of these

The order of dehydration of alcohol

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10> 20> 30

10> 30> 20

20> 30> 10

30> 20> 10

The carbon, carbon bond length in benzene is

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1.54A°

1.34A°

1.20A°

1.39A°

Preparation of vegetable ghee involves

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Halogenations

Hydrogenations

Hydroxylation

Dehydrogenations

Cyclohexane can be converted not benzene in the presence of

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Pt at 100°C

Pt at 250°C

Pd at room temperature

Pt at room temperature

Preparation of vegetable ghee involves:

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Halogenation

Hydrogenation

Hydroxylation

Dehydrogenation

The hydrocarbon which is used as an illuminating agent

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Methane

Methene

Methyne

B & C

Kolb's method has limited synthetic applications due to

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Expensive catalysis

Slow reaction

Number of side products produced

Salts used are very expensive

The sp²hybird orbitals are oriented in space at one angle

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180°

109.5°

100°

120°

When an aqueous solution of potassium salt of monocarboxylic acid is subjected to electrolysis, corresponding alkane is formed. This reation is known as

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Cannizaro reaction

Sabatier-secderens reaction

Alkylation

Kolbe's reaction

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