Question # 1

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

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

Alkanes have functional group :

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----X

--OH

----COH

No functional group

The difference between amount of heat actually released and that of calculated is called

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Bonding energy

Activation energy

Resonance energy

Transition energy

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

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Hund's rule

Markownikov's rule

Pauli's Exclusion principle

Auf ban principle

Alkanes are generally not reactive towards acids, alkalis, oxidation or reuducing agents. They however undergo some reactions, which one is the reaction undergone by alkanes

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Elemination

Addition

Free radical substitution

Nucleophilic substation

Alkyl benzenes are readily oxidized by axidfied

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KMnO₄

K₂CO₃

MnO₄

H₂SO₄

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

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2

1

3

4

During the preparation of alkanes the hydrogenation of alkenes or alkynes the catalyst may be

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H₂SO₄

Ni

Fe₂O₃

Al₂O₃

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

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Pentagonal

Hexagonal

Heptagonal

Tetragonal

Substitution of halogen in the benzene ring requires catalyst

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AlCl₃

FeCl₃

SiO₂

Organo - nickel

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

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Pxperation

Purification

Seperation

All of above

Which one does not declourized KMnO₄

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Alkenes

Alkynes

Bezene

All above

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4-methyl pentene

2-methyle-1-butene

2-methyl propane

None of the above

The empirical formula of benzene is determined by

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IR spectra

U.V

Elemental analysis

NMR spectra

Which can be used for dehydration of alcohol

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P₄O₁₀

H₂SO₄

H₃PO₄

All of them

A salt producing hydrocarbon among these compounds is

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Ehyne

Ethene

Methane

Ethane

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

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Glyoxal

Vinyl acetylene

Vinyl alcohol

Benzene

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

The carbon, carbon bond length in benzene is

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1.54A°

1.34A°

1.20A°

1.39A°

Vinyl acetylene combines with HCI to form

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Poly acetylene

Benzene

Chloroprene

Divinylacetylene

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

Which one of following is not monocyclic aromatic hydrocarbon

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Benzaldehyde

Benzoic acid

Benzene sulfonic acid

Biphenyl

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

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

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

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Ethane

Ethyne

Methane

Propane

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2, 3-dimethylbutane

2, 3-methylbutane

2-dimethylbutane

Dimethylbutane

The saturated hydrocarbons usually end with suffix ______

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Ane

Ene

Yne

Oic

Which reaction sequence would be best to prepare 3-chloro-aniline from benzene?

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Chlorination, nitration, reducing

Nitration, chlorination, reducition

Nitration, reduction,chlorination

Nitration, reduction, acylation, chlorination, hydrolysis

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