The anions present in baking soda, caustic soda, and washing soda respectively are
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- Baking soda is sodium bicarbonate (\( NaHCO_3 \)), so it contains \( HCO_3^- \).
- Caustic soda is sodium hydroxide (\( NaOH \)), so it contains \( OH^- \).
- Washing soda is sodium carbonate (\( Na_2CO_3 \)), so it contains \( CO_3^{2-} \).
- \( CO_3^{2-}, OH^-, HCO_3^- \)
- \( HCO_3^-, CO_3^{2-}, OH^- \)
- \( CO_3^{2-}, OH^-, OH^- \)
- \( HCO_3^-, OH^-, CO_3^{2-} \)
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Composition of the Given Compounds
- Baking Soda (\( NaHCO_3 \)): Contains the bicarbonate ion (\( HCO_3^- \)).
- Caustic Soda (\( NaOH \)): Contains the hydroxide ion (\( OH^- \)).
- Washing Soda (\( Na_2CO_3 \)): Contains the carbonate ion (\( CO_3^{2-} \)).
Step 2: Identifying the Correct Anion Sequence
- Baking soda: \( HCO_3^- \)
- Caustic soda: \( OH^- \)
- Washing soda: \( CO_3^{2-} \) Thus, the correct sequence of anions is \( HCO_3^-, OH^-, CO_3^{2-} \), which corresponds to option (4).
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