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Chemistry

Chemistry
Which one of the following elements exhibits the greatest tendency to lose electrons ?

Fluorine
Zinc
Lithium
Oxygen

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Chemistry
Catalyst is a substance which

Increases the rate of the reaction
None of these
Decreases the rate of reaction
Has no action on the rate of the reaction

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Chemistry
Cement is made hard with

Hydration and dissociation of water
Polymerisation
Dissociation of water
Dehydration

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Chemistry
What is the atomic number of mercury

63
41
32
80

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Chemistry
The iron ore magnetite consists of

3Fe2O3 .. 3H2O
FeCO3
Fe3OH4
Fe2O3

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Chemistry
The hardest form of carbon is

diamond
graphite
coke
charcoal

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