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प्रश्न
Name the source from which litmus solution is obtained. What is the use of this solution?
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उत्तर
Litmus solution is derived from lichens and serves as an indicator. When removed, it appears bright purple. It turns blue when added to bases but red when introduced to acids.
It is used as an indicator to distinguish between acids and bases.
| Solution | Colour of the litmus solution |
| Acidic | Red |
| Basic | Blue |
| Neutral | No change |
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संबंधित प्रश्न
When a piece of limestone reacts with dilute HCl, a gas X is produced. When gas X is passed through lime water then a white precipitate Y is formed. On passing excess of gas X, the white precipitate dissolves forming a soluble compound Z.
- What are X, Y and Z?
- Write equations for the reactions which take place:
- When limestone reacts with dilute HCl.
- When gas X reacts with lime water to form white precipitate Y.
- When excess of gas X dissolves white precipitate Y to form a soluble compound Z.
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