A few of them. Chlorine is one.
chermisty
Chlorine gas is actually yellow-green in color and has a distinct, pungent odor similar to bleach. It is not odorless.
Octane is a colorless liquid with a slightly sweet odor.
it is an odorless colorless gas that readily assumes the odor of anything it passes through. It has no shape.
Most of the chemicals are odorless as water, air, salt ,Glucose e.t.c
Natural gas is colorless and odorless in its pure form. However, a distinctive odor, often compared to rotten eggs, is added for safety reasons to help detect leaks. This odor is typically due to the chemical compound mercaptan.
Oxygen is a gas.- density: 1,429 g/L (but at 0 degrees)- atomic weight: 15,999- crystal structure: cubic- color: colorless- odor: no odor- melting point: -218,79C- boiling point: -182,962 COxygen is a gas at room temperature. It stays as diatomic molecules. This gas is colorless and odorless.
Neon is a gas without odor and color, with low density, low melting and boiling points, non toxic.
A gas is produced when a chemical change takes place. The temperature changes and a substance disappears. A solid is formed and a color change has occurred. Another chemical change is that a new odor is produced.
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Chlorine gas is yellow. It was used in one of the world wars and was referred to as Mustard Gas due to its yellowish color.
Neon is a gas without odor and color, with low density, low melting and boiling points, non toxic.