Question

Which of the following statement is incorrect about Carbon

It is not the most abundant element on earth

it has highest catenation power and show tetravalency

it can form only single bond and can form ring and branched molecules

it is one of the most essential element of organic chemistry and C-C bond is very stable.

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Answer 1

Answer:

3 rd is the incorrect one

Answer 2

Answer:

the image formed is virtual erect and magnified, it is formed by

concave lens and convex mirror

concave mirror and convex lens

concave mirror and concave lens

convex mirror and convex len