Question # 1

Chalco-pyite is an ore of:

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iron

aluminium

silver

copper

Aromatic compounds are given this name because of;

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smell they have

slippery touch they have

bitter taste they have

sour taste they have

Which hydrocarbon molecule would have no effect on the aqueous solution of bromine?

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CH₄

C₁₀H₂₀

C₂H₄

C₂H₂

Essential components of every living all are.

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Nucleic acids

Enzymes

Lipids

Cell wall

The black residue of the coal tar is called:

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peat

lignite

pitch

matte

Which is disaccharide?

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Glucose

Fructose

Sucrose

Starch

The ability of carbon atoms to form chains is called.

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Isomerism

Catenation

Resonance

Condensation

A hydrocarbon has molecular formula C₈H₁₄. What is the molecular formula of the next number of the same homologous series.

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C₉H₁₈

C₉H₁₆

C₉H₂₀

C₉H₁₂

The example of heterocyclic compound is.

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Benzene

Hexane

Cyclohexane

Pyridine

The reaction in which the number of moles reactants and products not equal in balance chemical equation the units of Kc for this reactions are

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mol^-2

dm³

mol²

mol dm^-1

The sphere just above the Earth's surface is.

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Mescosphere

Stratosphere

Thermosphere

Troposphere

When the number of moles of both sides are equal in a reaction then the unit of Kc will be:

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no unit

mol-2 dm6

mol dm3

mo-2 dn

Neurological damage is caused by the poisoning of.

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Lead

Cadimium

Mercury

All of them

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