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.
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 …………… .