Question # 1

Monosaccharide consists of number of carbon atoms.

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2 to 4

4 to 8

3 to 9

5 to 10

The % age of nitrogen and oxygen in our atmosphere is:

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80

90

95

99

Industrial effluents are highly

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Toxic organic compounds.

Inorganic salts.

Heavy metals

All of them

Which type of reactions do not go to completion?

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Irreversible reaction

Reversible reactions

Addition reactions

Decomposition reactions

Arrhenius put forward acid base concept in.

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1878

1786

1787

1790

Sindh alkalies limited was established near Karachi in.

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1965

1966

1970

2000

Amino acid are linked to each other through.

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Hydrogen link

Ionic link

Gelatin link

Peptide link

Formula of Methyl alcohol

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CH₅-OH

CH₃-CH₂-OH

All of them

None of these

Identify which one of the following compounds is a ketron?

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(CH₃)₂ CHOH

(CH₃)₂CHCl

(CH₃)₂CO

(CH₃)₂CHCl

Rickets disease is caused by the deficiency of.

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Vitamin D

Vitamin A

Vitamin E

Vitamin C

Normally rain water is weakly acidic because of.

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SO₃ gas.

CO₂gas.

SO₂gas.

NO₂gas.

Which gas is not present in atmosphere?

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Nitrogen

Oxygen

Helium

Carbon dioxide

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

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