Question

The ratio of sodium carbonate and sodium bicarbonate in normal alkali soil is

• A. 1:10
• B. 1:5
• C. 1:2.5
• D. 1:1

Hint:

Alkali soils:
- Contain sodium carbonates and bicarbonates.
- High pH (> 8.5).
- Ratio of Na$_2$CO$_3$:NaHCO$_3$ is approximately 1:10.

Answer 1

The Correct Option is A

Step 1: Understanding the Question:
This question tests knowledge of the composition of alkali soils.

Step 2: Detailed Explanation:
In normal alkali soils (sodic soils), the ratio of sodium carbonate (Na$_2$CO$_3$) to sodium bicarbonate (NaHCO$_3$) is approximately 1:10 (A).
This ratio indicates the dominance of sodium bicarbonate in alkali soils.
Other options:
- 1:5 (B): Not correct.
- 1:2.5 (C): Not correct.
- 1:1 (D): Not correct.
Thus, the ratio is 1:10.

Step 3: Final Answer:
Thus, the ratio of sodium carbonate to sodium bicarbonate in normal alkali soil is 1:10, which corresponds to option (A).
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