[Solved] Which Of The Following Is The Hardest Metal?

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Concept:

The hardness of the mineral is defined on Moh's scale of hardness. On this scale, a mineral is rated between 1-10 on the basis of its strength.
It is used to rate the hardness of a variety of substances and elements, not only metals. The softest materials it rates are assigned a rating of 1; the hardest earn a rating of 10.

Explanation:

The Moh's scale of different minerals shown below -

F1 Aman Madhu 05.08.20 D5

Tungsten is the hardest metal. ∴ Option 4 is correct.
Platinum is a less hard metal. That's why it is used in Jewellery. It can make intricate designs. It is highly ductile.
The name Tungsten originates from the Swedish name tungsten meaning heavy stone.
Hardness is the ability to scratch making a dent on the surface of the metal. It is just a number measured using (Rockwell, Brinell, Vickers test) Of which Brinell is most accurate.
Gold: 25 Mpa
Platinum: 40 Mpa
Tungsten: 310 Mpa
Iron: 150 Mpa
Diamond: 10000 Mpa (Non-metal)
It is a chemical element with atomic number 74 that has the highest tensile strength of all the metals present in the world. Its symbol is "W"
When combined with carbon, tungsten becomes stronger and even more durable. Tungsten carbide is the end product of mixing tungsten with carbon. Tungsten carbide is 4 times stronger than platinum with a hardness rating of 9 on the Mohs scale, softer only than diamond.
From the above, 310 > 40, So, Tungsten is harder than Platinum.

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