Plastic articles are available in all possible shapes and sizes. Why?

The number of all possible squares in a chess board is

It is not advisable to burn plastic and synthetic fabrics. Why?

Pet plastics are not more environmental hazardoxs substances. Why?

Why aeroplanes and cars have streamline shape?

The letters of word ZENITH are written in all possible ways. If all these words are written out as in a dictionary, then find the rank of the word ZENITH.

Why is starch digestion not possible in the stomach ?

Is it possible to find dinosaurs today ? Why ?

Why is not possible to push a car from inside