Question # 1

Chalco-Pyrite is an ore of:

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Copper

Silver

Iron

Aluminium

Which gas is emitted due to volcanic eruption?

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CO₂

SO₃

NO₂

H₂

Dilute acid react with carbonates the produce product except _________

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Salt

Water

Carbon di oxide

Hydrogen gases

Amino acid are linked to each other through.

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Hydrogen link

Ionic link

Gelatin link

Peptide link

Which of the following in soluble in water.

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Organic acids

Glucose

Alcohal

All of them

Petroleum is refined by

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Destructive distillation

Fractional distillation

Simple distillations

Dry distillation

Alkyl radical is derivative of

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Alkane

Alkene

Alkyne

All

Extraction of metals from its ores is called.

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Metallurgy

Mining

Griding

All

The lives of aquatic plants and animals are indirectly related to concentration of dissolved ------ in water:

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hydrogen

oxygen

chlorine

nitrogen

In dry cleaning, which chemical is used.

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Chloroform

Carbon tetachloride

Ecetaldehyde

Ethanol

Monosaccharides are crystalline solids

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Grey

Crimson

Silver

White

Which one of the diseases causes severe diarrhea and can be fatal?

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Jaundice

Dysentery

Cholera

Typhoid

The sphere just above the Earth's surface is.

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Mescosphere

Stratosphere

Thermosphere

Troposphere

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