Question

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page 10 of 25
question 10
which of the following can be classified as a pure compound?
a alcohol in water
b baking soda (sodium bicarbonate)
c iodine
d mercury

Explanation:

A pure compound is made up of two or more different elements chemically combined in a fixed ratio. Alcohol in water is a mixture. Iodine and mercury are elements. Baking soda (sodium bicarbonate, $NaHCO_3$) is a compound made of sodium, hydrogen, carbon and oxygen in a fixed - ratio.

Answer:

B. baking soda (sodium bicarbonate)