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The amount of water loss from a leaf can be detected using

The amount of water loss from a leaf can be detected using
Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE
  • A Lime-water
  • B Red litmus paper
  • C Blue litmus paper
  • D Blue cobalt chloride paper
  • E Pink cobalt chloride paper
Correct Answer: Option D
Explanation:
The correct answer is D: blue cobalt chloride paper.

Explanation:
- Blue cobalt chloride paper is commonly used to detect water loss from leaves. When the paper comes into contact with water vapor, it turns from blue to pink, indicating the presence of moisture. This is used in experiments to demonstrate transpiration, where the leaf loses water in the form of vapor.

- Lime-water is used to detect the presence of carbon dioxide, not water loss.

- Red and blue litmus papers are indicators for acids and bases, not for water loss.

- Pink cobalt chloride paper would be the opposite of blue cobalt chloride, indicating the presence of moisture, but the typical indicator used is blue cobalt chloride paper to detect water vapor.

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