Question

The element which is not common between the compounds called baking soda and soda ash is:

• A. nitrogen
• B. hydrogen
• C. oxygen
• D. sulphur

Answer 1

The correct option is B hydrogen

Baking soda formula is $NaHC{O}_3$.

Soda ash formula is $N{a}_{2}C{O}_3$.

So, hydrogen atom $\left(H\right)$ is not common between the compounds of baking soda and soda ash.

So, the answer is $B$.