Question

Which of the following is true about carbon dioxide?

a.) Carbon and oxygen are chemically bonded in it.
b.) Carbon and oxygen retain their original identity in it.
c.)It can be separated into carbon and oxygen using physical methods.
d.)The proportion of carbon and oxygen is different in different samples of the gas.

Answer 1

a) Carbon and oxygen are chemically bonded in carbon dioxide.

The elements lose their individual identities in CO₂, and they always combine o the proportion C:O = 1:2.

You cannot separate the elements from each other by physical means.