Question # 1

Acetic acid is used for:

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Elching designs

Clearing metals

Flavouring food

Making explosives

The depletion of which gas results in the death of aquatic life.

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Oxygen

Carbon di oxide

Boath of them

Nome of them

General formula of alcohols is:

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RCHO

ROH

O= R - C -OH

O = R - C- R

Almost all aircrafts fly in:

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troposphere

mesosphere

stratosphere

themosphere

Benzene is formed by the polymerization of.

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Alkene

Alkane

Acetylene

Methane.

General formula of carbohydrates is.

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C_n(H₂O)₆

C_n(H₂O₂)₆

C_n(H₃O)₆

C_n(H₂O₃)₆

Thermosphere lies beyond.

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Stratosphere

Troposphere

Mesosphere

Biosphere

The water which produces good lather with soap is called:

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soft water

hard water

heavy water

typical water

The percentage of SO₂released by the combustion of coal and petroleum product.

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40%

60%

70%

80%

Alkanes are least reactive compounds because they are.

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Saturated hydrocarbons.

Unsaturated hydrocarbons.

Both a and b

None of the above.

Temporary hardness is because of .

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Ca(HCO₃)₂

CaCO₃

MgCO₃

MgSO₄

Specific heat capacity of water is.

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4.2 KJg^-1 K^-1

4.2 Jg^-1K^-1

2.4 KJg^-1K^-1

2.4 Jg^-1K^-1

Iron and steel structure are damaged by.

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Carbon monoxide

Sulphur dioxide

Methane

Carbon dioxide

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