General Science
Amalgams are

Highly coloured alloys
Alloys which have great resistance to abrasion
Alloys which contain carbon
Alloys which contain mercury as one of the contents

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General Science
Among the various allotrope of carbon

Diamond is the hardest, coke is the softest
Diamond is the hardest, graphite is the softest
Diamond is the hardest, lamp black is the softest
Coke is the hardest, graphite is the softest

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