10 grade science
Which of the following acts as a self – indicator?
- A. K₂Cr₂O₇
- B. KMnO₄
- C. Oxalic acid
- D. Iodine
Which of the following acts as a self – indicator?
- A. K₂Cr₂O₇
- B. KMnO₄
- C. Oxalic acid
- D. Iodine
1 Answer
Askiitians Tutor Team
Approved Tutor Answer9 Months agoIn the context of chemistry, a self-indicator is a substance that can indicate its own endpoint during a titration without the need for an additional indicator. Among the options provided, KMnO₄ (Potassium permanganate) acts as a self-indicator. It changes color from purple to colorless as it reacts, making it easy to identify the endpoint of a titration.
Understanding the Options
- K₂Cr₂O₇ (Potassium dichromate): This compound is used in redox reactions but is not a self-indicator.
- Oxalic acid: This is a weak acid and does not indicate its own endpoint.
- Iodine: While it can be used in titrations, it does not serve as a self-indicator.
Therefore, the correct answer is KMnO₄.
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