An unknown gas is likely to be carbon dioxide if it has which of the following
characteristics?
a
turns limewater milky
b. is flammable
c. is less dense than air
d. has a penetrating odor

An unknown gas is likely to be carbon dioxide if it turns limewater milky.

Option a

Calcium Hydroxide also known as lime is a sparingly soluble compound which when dissolved in water produces an alkaline solution known as lime water. When a gas such as carbon dioxide passes through this alkaline solution, it turns lime water milky due to the formation of an insoluble suspension of calcium carbonate . This can be understood by the following chemical reaction-

If an excess amount of gas is added in the solution, the following reaction takes place:

At this stage, the milkiness of the solution disappears since "calcium bicarbonate is soluble in water".

plasma is the state of matter where the substance is ionized and has no definite shape or volume. the fact of being ionized makes the substance a good electrical conductor.

2b2t

explanation:

2b2t