Chemistry
Diamond is used for
- making the electrodes of electric furnaces.
- making crucibles for melting metals.
- cutting and drilling rocks and glass.
- making carbon brushes for electric motors.
Carbon
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Answer
cutting and drilling rocks and glass
Reason — Diamond is used for cutting and drilling rocks and glass as it is very hard.
Graphite is used in making the electrodes of electric furnaces, crucibles for melting metals, carbon brushes for electric motors.
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Related Questions
A crystalline form of carbon is
- lamp black
- gas carbon
- sugar
- fullerene
Graphite is used to make crucibles because it is:
- a good conductor of electricity
- a good conductor of heat
- soft and slippery
- has high melting point
Carbon forms innumerable compounds because:
P. it has four electrons in its outermost shell.
Q. it behaves as a metal as well as a non-metal.
R. carbon atoms can form long chains.
- Only P is correct.
- Only Q is correct.
- Both P and R are correct.
- Both Q and R are correct.
Fill in the blanks:
(a) …………… is present in both living and non-living things.
(b) The property of an element to exist in two or more forms but in the same physical state is called …………… .
(c) …………… and …………… are the two major crystalline allotropes of carbon.
(d) …………… is the hardest substance that occurs naturally.
(e) The name 'carbon' is derived from the Latin word …………… .