Question # 1

Which is present 85% in natural gas?

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Ethane

Propane

Methane

Butane

Which gas acts as a glass wall of a green house?

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Oxygen

Carbon dioxides

sulphur dioxide

Hydrogen

Which of one of the following is used as as fumigant:

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Ethyl alcohol

ethylene oxide

ethylene glycol

diethyl ether

Active mass is expressed as:

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{ }

[ ]

( )

l l

Almost all air crafts fly in which reion?

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Troposphere

Stratosphere

Mesosphere

Thermosphere

Which disease causes bone and tooth damage?

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Fluorosis

Hepatits

Cholera

Jaundice

The reactions in which products can recombine to form reactants is called.

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Irreversible reactions

Reversible reactions

Direct reactions

Indirect reactions

Which gas is used to manufacture king of chemicals sulphuric acid?

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N₂

O₂

Cl₂

S

Chemical formula of chloroform.

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CH₃Cl

CH₂O₂

CHCl₂

CCl₄

Which of the following statement s is not true about fossil fuels?

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they all contain carbon

They are renewable

they produce pollutants when burnt

they cause acid rain

Main component of Natrual gas.

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CH₃

CH₄

C₂H₆

C₂H₂

Which part of digestive system glucose absorb.

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Stomach

Liver

Small intestine

Large intestine.

Substitution reaction is the characteristics of.

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Alkanes

Alkenes

Alkynes

None of these

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