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प्रश्न
How will you prepare natural indicator from turmeric powder?
उत्तर
- Turmeric indicator is one of the natural indicator.
- By adding a small amount of water to turmeric powder, a paste is prepared.
- This is applied on a blotting paper or filter paper and dried.
- These strips are used as indicators to find the nature of the solution.
- In acidic solution, turmeric indicator paper has no change in colour.
- That means, it remains yellow. In the basic solution, the colour changes from yellow to red.
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संबंधित प्रश्न
Three liquids are given to you. One is hydrochloric acid, another is sodium hydroxide and the third is a sugar solution. How will you identify them? You have only turmeric indicator.
The property which is not shown by acids is:
(a) they have sour taste
(b) they feel soapy
(c) they turn litmus red
(d) their pH is less than seven
Why does tooth decay start when the pH of mouth is lower than 5.5?
Fill in the following blank with suitable words:
The more acidic a solution, the ................. the pH.
What would you expect the pH of pure water to be?
What do you think will be the pH in the stomach of a person suffering from indigestion: less than 7 or more than 7?
Fresh milk has a pH of 6. When milk changes into curd, the pH value will:
(a) become 7
(b) become less than 6
(c) become more than 7
(d) remain unchanged
Solution A turns universal indicator blue to purple whereas solution B turns universal indicator orange to red.
What sort of reaction takes place when solution A reacts with solution B?
In acidic solution, the colour of the hibiscus indicator paper will change to _____.
Neutral substances do not bring about any change in colour of indicators.
