Question

The anions present in baking soda, caustic soda, and washing soda respectively are

• A. \( CO_3^{2-}, OH^-, HCO_3^- \)
• B. \( HCO_3^-, CO_3^{2-}, OH^- \)
• C. \( CO_3^{2-}, OH^-, OH^- \)
• D. \( HCO_3^-, OH^-, CO_3^{2-} \)

Hint:

- 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 \( CO_3^{2-} \).

Answer 1

The Correct Option is D

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).