Which one of the following is the hardest substance ........

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Which one of the following is the hardest substance?

Gold

Glass

Quartz

Diamond

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Explanation:

Diamond is a solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic. At room temperature and pressure, another solid form of carbon known as graphite is the chemically stable form, but diamond almost never converts to it. Diamond has the highest hardness and thermal conductivity of any natural material, properties that are utilized in major industrial applications such as cutting and polishing tools. They are also the reason that diamond anvil cells can subject materials to pressures found deep in the Earth.

By: ANIVESH KUMAR

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Gurkirat Singh Nijjar

diamond is not a metal. kindly rectify

Jaspreet Singh

Glass, Quartz and Diamond are non metals. The only metal given in the options is Gold.

Dr.Ankush Sharma

Sir hardest metal is asked Diamond is a non metal and quarts and mirror are sio2 which is a transitional metal between metal and non metal amorphous non metal minerals Thus gold is the only metal in the options If the question was hardest material then I would have marked diamond Hardest metal is tungsten

Rishabh Aggarwal

question asks for "metal", diamond, glass or quartz are not metals

Amarbir Sangha

ques. asked hardest 'metal'. diamond is an allotrope of carbon, which is a non-metal.