Chemistry
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.
Carbon
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Answer
Both P and R are correct.
Reason — Carbon forms innumerable compounds because carbon atoms have the unique property of linking with one another to form very long chains of different sizes which may be straight, branched or cyclic. This property is called catenation. Carbon has four electrons in its outermost shell.
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Related Questions
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
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.
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 …………… .
Write True or False against the following statements:
(a) Carbon occurs as carbon dioxide in the atmosphere.
(b) Graphite is the purest form of carbon.
(c) Coloured diamonds are costlier than colourless and transparent diamonds.
(d) Graphite has layers of hexagonal carbon bondings.
(e) Diamond is insoluble in all solvents.