Q.

Carbon is/are tetravalent because


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a

It has 4 electrons in the outermost shell

b

Requires 4 electron to achieve noble gas configuration

c

Only 1 or 2

d

Both 1 & 2 

answer is D.

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Detailed Solution

Carbon is tetravalent because it has 4 electrons in the outermost shell and it requires 4 electrons to achieve noble gas configuration.
Carbon has electronic configuration (2,4) and it contains four electrons in the outermost orbital. It can achieve noble gas configuration by sharing electrons only and to achieve this configuration, carbon atom requires 4 electrons to achieve noble gas configuration. The example for tetravalent carbon is CH4.
 
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