Question # 1

Chemical formula for urea is:

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NH4CNO

NH4CH

NH2CONH2

NH4CI

Global warming is because of.

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Absorption of infrared radiation emitted by earth surface.

Absorption of infrared radiation coming from sun.

Absorption of infrared Ultraviolet coming from the sun.

Emission of ultraviolet radiation from the earth's surface.

Which one of the following statements is not correct about active mass?

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Rate of reaction is directly proportional to activ emass.

Active mass is taken in molar concentration

Active mass is represented by square brackets

Active mass means total mass of substances.

Urea is nitrogenous fertilizer. It consist of nitrogen.

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26.6 %

36.6%

46.6%

56.6%

Arrhenius presented his concept about acids and bases in.

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1785

1787

1923

1930

The strong heating of coal in the absence of air is called.

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Carbonization

Destructive distillation

Fractional distillation

All

_________ acid is used in lead storage batteries as electrolyte.

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CH₃COOH

HCl

HNO₃

H₂SO₄

The example of heterocyclic compound is.

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Benzene

Hexane

Cyclohexane

Pyridine

Ozone depletion was first noticed is.

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1970's

1980's

1990's

1960's

A conjugate acid is a specie formed by accepting a.

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Proton

Electron pair

Neutron

Electron

The lives of aquatic plants and animals are indirectly related to concentration of dissolved ------ in water:

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hydrogen

oxygen

chlorine

nitrogen

Soda lime is a mixture of..

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CaCl, + KOH

NaOH + CaO

NaOH + CaCl₂

Ca(OH)₂ + CaO

The residual oil is heated above 400 c to produce.

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Lubricants

Paraffin wax

Asphalt

All

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