Among the various allotropes of carbon,
coke is the hardest, graphite is the softest
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
Additional Questions
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The group of metals Fe, Co, Ni may best called as |
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Heavy water is |
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The chemical (ethyl mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of |
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The element common to all acids is |
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Soda water contains |
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