Question # 1

When NaHCO₃ is heated it forms.

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CO₂

Ca(OH)₂

CaCO₃

CaO

According to Bronsted and Lowry concept an acid is a substance that can donate.

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Proton

Electron pair

Neutron

Electron

Which one of the following species is not amphoteric?

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H₂O

NH₃

HCO₃

SO₄

Which one of the following salts makes the water permanently hard?

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NaCO₃

NaHCO₃

CA(HCO₃)₂

CaSO₄

Monosaccharide consists of number of carbon atoms.

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2 to 4

4 to 8

3 to 9

5 to 10

Sea water in unfit for drinking purpose die to the presence of.

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Salts

Algae

Fishes

All of them

In irreversible reaction, dynamic equilibrium:

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Never establishes

Establishes before the completion of reaction

Establishes after the completion of reaction

Establishes readily

Incomplete combustion of alkanes produce.

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Carbon dixoide only

Carbon monoxide only

Carbon monoxide carbon black and water

Carbon dioxide and carbon black

Coal is the mixture of

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Hydrogen

Methane

Carbon monoxide

All

The surface tension of water is:

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very low

moderate

high

zero

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

Traces of acetylene are present in coal gas about.

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0.06 %

0.08%

1.1%

90%

The % age of carbon is bituminous is

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60

70

80

90

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