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 2 of 8.
Sana said:
9 years ago
Platinum is not the hardest substance on the earth. It has electronic cloud of electrons.
Sana said:
9 years ago
Because of very close packing of atoms of carbon and it have no free spaces.
Jayanti said:
9 years ago
Platinum is the hardest substance available on Earth.
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.
Kartheek said:
9 years ago
It is very hard substance than any other metal.
Chandan said:
10 years ago
There should be another option that wurtzite boron Nitride, world hardest material is boron Nitride that mention.
Vishnu said:
10 years ago
Borazon (cubic Boron Nitride) is harder than Diamond, undoubtedly.
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.
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!
Danila said:
10 years ago
The right answer is diamond because, it can cut any substance.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers