General Knowledge - General Science - Discussion
Discussion Forum : General Science - Elements and Metals (Q.No. 12)
12.
The hardest substance available on earth is
Discussion:
79 comments Page 5 of 8.
Sidd said:
1 decade ago
What about titanium, uranium, plutonium?
Prathibha patel said:
10 years ago
Diamond is the hardest natural material known, where hardness is defined as resistance to scratching and is graded between 1 (softest) and 10 (hardest) using the Mohs scale of mineral hardness. Diamond has a hardness of 10 (hardest) on this scale. Diamond's hardness has been known since antiquity, and is the source of its name.
Krishna kunal from D.G.I.S madhepura Bihar said:
10 years ago
Diamond is very hard material because of the largest number of carbons present in it. We have seen that coal is made up of carbons and both are formed from same process and coal is modified into diamond. So, we found that coal and diamond are found in same mine.
Danila said:
10 years ago
The right answer is diamond because, it can cut any substance.
Swetanshu said:
10 years ago
Diamonds are considered to be the hardest substance on earth, diamonds are brilliant & bright. The speed of light in a vacuum is 186,000 miles per second but light slows down a little when passing through a matter. Diamonds also bends and reflect light and break it up into the colours of the rainbow, which is what gives them their sparkle!
Sunny yadav said:
10 years ago
Diamonds are the hardest substance discovered till now it is used for various purposes as cutting difficult glass piece but gold or soon not you cannot do it.
Vishnu said:
10 years ago
Borazon (cubic Boron Nitride) is harder than Diamond, undoubtedly.
Chandan said:
10 years ago
There should be another option that wurtzite boron Nitride, world hardest material is boron Nitride that mention.
Kartheek said:
9 years ago
It is very hard substance than any other metal.
Abc said:
9 years ago
Diamond is the hardest naturally occurring substance found on Earth. But it is not the hardest substance. Wurtzite boron nitride (synthetic) and lonsdaleite (which comes from meteorites) are both harder.
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