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Coal
Graphite
Diamond
Gold
Which one is not metal
Which one is not the isotopes of hydrogen ?
Which one is the pure element
Which one is the purest form of carbon?
Which one of the following contains cobalt?
Which one of the following elements is essential for construction is nuclear reactors
Which one of the following elements is the poorest conductor of heat
Which one of the following has a maximum tendency to form M3 ion ?
Which one of the following is a composite propellant?
Which one of the following is known as the brown coal?