Question # 1

The mean residence time of methane in atmosphere in

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1-2 years

3-4 years

3-5 years

3-7 years

Secondary alkyl halides are those in which halogen atom is attached with a carbon atom which is further attached to.

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One beta carbon

Two beta carbon

Three beta carbon

Four beta carbon

The news paper can be recycled again and again as many times as

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5

3

4

2

Which element when react with chlorine form polymeric halide.

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Na

Be

Ba

P

An aldehyde compound can be reduced to alkane by

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Wurtz reaction

Grignard reaction

Wolf Kishner reaction

Kolbe's reaction

Which one of the following alkanes will be formed by the hydrolysis of ethyl magnesium bromide

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Methane

Ethane

Butane

do not hydrolysed

Acid rain fist of all was observed by

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Augus Smith

Robert Hook

Mosley

Watson

Venyl acetylene combines with HCl in

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Polyacetylene

Benzene

Chloroprene

divinyl acetylene

Bleaching powder may be produced by passing chlorine over.

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Calcium carbonate

Hydrated calcium sulphate

Anhydrous calcium sulphate

Calcium hydroxide

Which one of the following sets has coinage metaals is it.

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Cu, Hg, Au

Cu, Ag, Au

Ag, Au, Hg

Cu, Fe, Au

Acetaldehyde undergoes, aldol condensation in the presence of.

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dil HNO3

DIL NaOH

dil HCl

Conc. H2SO4

The reactivity order of alkyl halides for a particular alkyl group is

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Fluoride > Chloride > Bromide > iodide

Chloride > Bromide > Fluoride > iodide

Bromide > iodide > chloride > Fluoride

Iodide > Bromide > Chloride > Fluoride

Which halogen will react spontaneously with Au(s) to produce Au³⁺

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Br₂

F₂

I₂

Cl₂

Which one of the following oxides is amphoteric in nature.

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MgO

Na2O

SO2

ZnO

All of the followings react with Fehling solution except

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CH2CH2CHO

CH3-CH2COCH3

HCHO

CH3-CHO

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

Total number of d-block elements are

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10

20

30

40

The general formula for Alkanes is

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C_nH_2n+1

C_nH_2n

C_nH_2n-2

C_nH_2n+2

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