Question

The element which is not common between the compounds baking soda and soda ash is:
A.Nitrogen
B.Hydrogen
C.Oxygen
D.Sulphur

Answer 1

Hint:
The common name compounds which have the word ‘soda’ in the are usually compounds consisting of the element Sodium.

Complete step by step answer:
-Both soda ash and baking soda are common sodium compounds or salts that we use often in our day to day lives.
-Soda ash is the common name for the sodium salt whose chemical name is sodium carbonate.
-Similarly, baking soda is a more generic term for a sodium salt with the chemical name as sodium bicarbonate.
-The chemical formula for baking soda or sodium bicarbonate is $$NaHC{O}_3$$, while the chemical formula for soda ash or sodium carbonate is $$N{a}_{2}C{O}_3$$.
-From the above chemical formulae, we can determine that the common element between these two sodium compounds are
Sodium (Na)
Carbon (C)
Oxygen (O)
-Hydrogen is not common between the two compounds, it is present in at least one of them, unlike sulphur.

Hence, Option B is the correct option.

Note:
Although baking powder is known as sodium bicarbonate, the bicarbonate nomenclature does not indicate the existence of 2 carbonate molecules.