Is Matter Around Us Pure? — Science STD 9 — Question
Maharashtra BoardEnglish MediumSTD 9ScienceIs Matter Around Us Pure?1 Mark
MCQ
The element which is not common between the compounds called baking soda and soda ash is:
A
Sodium.
✓
Hydrogen.
C
Oxygen.
D
Carbon.
✓
Answer
Correct option: B.
Hydrogen.
Washing soda $($soda ash$), \ce{Na_2CO_3}$ contains $Na , C$ and $O$ , whereas baking soda, $\ce{NaHCO_3}$, is made up of $Na , C , H$ and $O$ . So, the element, which is not common in the two, is hydrogen.
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