Question # 1

Traces of acetylene are present to coal gas about.

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0.06 %

0.08%

1.1 %

90%

Red hair contains compound of.

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Iron

copper

titanium

Molybdenum

DNA was discovered by

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J .Watson

Funk

Robert brown

Hopkins

Cause of global warming is :

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CO₂ gas

SO₂gas

NO₂gas

O₂gas

Concentration is process of:

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Mixting technique

Separating technique

Boiling technique

Cooling techique

Acetic acid is used for:

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Elching designs

Clearing metals

Flavouring food

Making explosives

Amino acid are linked to each other through.

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Hydrogen link

Ionic link

Gelatin link

Peptide link

Which part of digestive system glucose absorb.

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Stomach

Liver

Small intestine

Large intestine.

Water become hard because of:

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Ca+2

Mg+2

SO-24

all of these

In forth flotation process the ore particles are preferentially wetted by:

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water

oil

benzene

petrole

The coal in which the percentage of carbon is 60%

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Peat

Lignite

Bituminous

Anthracit

Pitch is black residue of

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Coke

Coal-tar

Coal

Coal gas

The major constituents of troposphere are:

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carbon dioxide and argon

nitrogen and oxygen

argon and oxygen

carbon dioxide and oxygen

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