Question # 1

Catalytic oxidation of alkanes is used for the preparation of

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Adehydes

Fatty acid

Carbonyylic acids

Ketones

B-B'-dichloroethyl sulphide is commonly known as

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Mustard gas

Laughing gas

Phosgene gas

Bio gas

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

Acetylene when treated with 10% H₂SO₄in the presence of HgSO₄adds one molecule of water to form

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Aldehydes

Esters

Alcohols

Acids

An alkynes having Carbon count of 20 is

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gas

liquid

Solid

None

Acetylene gives

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

White ppt. with ammonical AgNO3 and red ppt. with ammonical Cu2C12

White ppt. with both

Red ppt. with both

Introduction of a second methyl group in methylbenzene will give how many isomeric dimethyllenzenes

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2

1

3

4

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

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Pxperation

Purification

Seperation

All of above

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

Physical properties of alkanes increase with increase of all physical constants except

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Boiling points

Melting points

Density

Solubility

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

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Saturation

Unsaturation

Substitution

None of above

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

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Polyacetylene

polyethylene

Benzene

None of these

When methane reacts with Cl₂in the presence of diffused light the products obtained are

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Chloroform only

Carbon tetrachloride only

Chloromethane and dichloromethane

Mixture of a, b, c

Ethylene can be prepared in the laboratory by heating together ethyl alcohol and

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HCI

Phenol

HF

H₂SO₄

Hydrocarbons are divided into aliphatic, alicyclic and aromatic which structure among the following show an alicyclic hydrocarbon

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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

A single benzene ring can have ______ ortho position maximally

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One

Two

Three

Four

When alkyl is treated with chlorine in the presence of sunlight

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1,3 dichloroproduct is formed

1,4 dichloro product is formed

1,3,5 trichloro product is formed

Only alkyl group is substituted

Preparation of vegetable ghee involves

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Halogenations

Hydrogenations

Hydroxylation

Dehydrogenations

Substitution of halogen in the benzene ring requires catalyst

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AlCl₃

FeCl₃

SiO₂

Organo - nickel

In CH₄, all the H-C-H bond angles are

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120°

107°

109°

109.5°

Preparation of vegetable ghee involves

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Halogenations

Hydrogenation

Hydroxylation

Dehydrogenation

The three alternate single and double bonds in the benzene ring are called

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Conjugate bonds

Resonating bonds

Both A and B

None of above

Ethylene combines with water in the presence of H₂SO₄+ HgSO₄and forms

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Ethyle chloride

Ethyle alcohol

Carboxylic acid

None of these

During nitration of benzene, the active nitrating agent is

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NO3

NO2+

NO2-

HNO3

Which of the following reaction is characteristic of benzene

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Electrophilic substitution reaction

Reduction

Oxidation

Ozonolysis

Benzene can be obtained by heating either benzoic acid with X or phenol with Y. X and Y are respectively

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Zinc dust and soda lime

Soda time and zinc dust

Zinc dust and sodium hydroxide

Soda lime and copper

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

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Pentagonal

Hexagonal

Heptagonal

Tetragonal

Benzene does not undergo polymerization and it is also resistant to

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Reduction

Oxidation

Alkylation

Ozonolysis

When benzene is burnt in free supply of air, it is completely oxidized to

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CO

CO₂₊H₂O

H₂CO₃

None

Alkanes are gases :

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C₁-C₄

C₅-C₁₀

C₁₁-C₁₅

C₁₀-C₂₀

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