Question # 1

Traces of acetylene are present to coal gas about.

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0.06 %

0.08%

1.1 %

90%

Acetic acid is used for:

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Elching designs

Clearing metals

Flavouring food

Making explosives

Organic compounds contain:

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ionic bond

Covalent bond

Metallic bond

Co-ordinate covalent

Which of the following is fat soluble vitamin?

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Vitamin A

Vitamin E

Vitamin K

All of these

When a reaction ceases to proceed further , it is called.

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Chemical states

Static state

Physical state

Dynamic equilibrium state

Lipids are macromolecules. They have characteristics except one of the following.

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They are high energy foods.

They are soluble in water.

They are poor conductor of heat.

They are esters of fatty acids.

Number of vitamins in vitamin B complex is.

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10

8

6

12

Ethen is prepared by heating a mixture of ethanol and excess of concentrated sulphuric acid at:

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150°C

180°C

250°C - 300°C

400°C - 450°C

The major constituents of troposphere are:

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carbon dioxide and argon

nitrogen and oxygen

argon and oxygen

carbon dioxide and oxygen

Process of heating the concentrated ore to high temperature in excess of air is called.

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Roasting

Smelting

Bessemerization

All

When glucose and fructose combine and forms.

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Starch

Cellulose

Sucrose

None of these

Which gas protects the Earth's surface from ultraviolet radiations?

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CO₂

CO

N₂

O₃

Dichloromethane reacts with halogens in the presence of diffused sun light and produces

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Carbon tetrachloride

Chloroform

Chloromethane

No reaction

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