Related Questions

The hardest rock is
A Marble
B Diamond
C Talc
D Quartz
which of the following is the hardest element?
A Iron
B Diamond
C Copper
D Silicon
Which of the following is the hardest?
A Austenite
B Pearlite
C Bainite
D Martensite
Which one among the following is the hardest part of our body ?
A Skull bones of head
B Thumb nails
C Enamel of teeth
D Spinal vertebra
Which of the following is the hardest material?
A Topaz
B Quartz
C Corrundum
D Flourite
Among the following the hardest metal is
A Gold
B Iron
C Platinum
D Tungsten
__________ is the hardest material out of the following.
A Boron carbide
B Tungsten carbide
C Hardened steel
D Silicon carbide
The Hardest substance available on Earth is
A Diamond
B Wurtzite
C Platinum
D Gold
The hardest form of carbon is
A coke
B graphite
C diamond
D charcoal
Hardest allotrope of carbon is
A Diamond
B Graphite
C Coke
D Lamp black

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