Question # 1

In which one of the following is a substitution reaction?

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Halogenations of alkynes

Halogenations of alkenes

Halogenations of alkanes

Bromination of alkenes

Thermosphere lies beyond.

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Stratosphere

Troposphere

Mesosphere

Biosphere

According to the Lewis concept acid is a substance which can.

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Donate a proton

Donate a pair of electron

Accept a proton

Accept a pair of electron.

What percentage of nitrogen and oxygen is in the atmosphere.

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69%

79%

9%

89%

The formula which represents the actual number of atoms in one molecule of organic compound is called.

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Molecular formula

Structural formula

Condensed formula

Dot and cross formula

Lavoisier named binary compounds of oxygen acids in .

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1787

1790

1815

1828

Petroleum is refined by

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Destructive distillation

Fractional distillation

Simple distillations

Dry distillation

Alkyl radical is derivative of

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Alkane

Alkene

Alkyne

All

A salt is not composed of

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A metallic cation

Non -metallic anion

an anion of a base

An anion of an acid

Which gas in produced during ripening of bnabanas.

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Methane

Ethene

Acetylene

Carbon dioxide

Natural gas contains.

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Methane

Ethane

Propane

All

Earth has natural systems.

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One

Two

Three

Four

Which disease cause when humans use water of industrial effluents.

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Cancer

Asthma

Jaundice

cholera

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