MCQ
The element which is not common between the compounds called baking soda and soda ash is:
- ASodium.
- ✓Hydrogen.
- COxygen.
- DCarbon.
Washing soda (soda ash), $\mathrm{Na}_2 \mathrm{CO}_3$ contains $\mathrm{Na}, \mathrm{C}$ and $O ,$ whereas baking soda, $\mathrm{NaHCO}_3$, is made up of $\mathrm{Na}, \mathrm{C}, \mathrm{H}$ and $O .$ So, the element, which is not common in the two, is hydrogen.
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