Question # 1

In shoe polished, which chemical is used.

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Ethanol

Methanol

Carbon black

Formaldehyde

Global warming is because of.

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Absorption of infrared radiation emitted by earth surface.

Absorption of infrared radiation coming from sun.

Absorption of infrared Ultraviolet coming from the sun.

Emission of ultraviolet radiation from the earth's surface.

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

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40%

60%

70%

80%

Tetra saccharides are classified under.

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Monosaccharides.

Oligosaccharides

Polysaccharides

All of them

A product of any Lewis acid base reaction is a single specie called.

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Salt

Water

Adduct

None of these

Pitch is black residue of

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Coke

Coal-tar

Coal

Coal gas

Methyl orange produces which colour in basic solution

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Red

Yellow

Pink

White

The base which is used in alkaline batteries is.

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NaOH

Al(OH)₂

KOH

Mg(OH)₂

Chalco-Pyrite is an ore of:

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Copper

Silver

Iron

Aluminium

Cause of diarrhoea among following is:

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Diarrhea

Cholera

Cryptosporidium

Typhoid

Example of complex salt is.

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Zinc sulphate

Potash alum

Potassium ferrocynide

Sodium Phosphate

Concentration is process of:

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Mixting technique

Separating technique

Boiling technique

Cooling techique

Which of the following gas is used in warfare?

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Methane

Ethane gas

Mustard gas

None of these

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