Nitrogen dioxide is an example of ________.
Which of the following is not a greenhouse gas?
(a) Carbon dioxide
(b) Sulphur dioxide
(c) Methane
(d) Nitrogen
A form of matter has no fixed shape but it has a fixed volume. An example of this form of matter is:
(a) Krypton (b) Kerosene (c) carbon steel (d) carbon dioxide