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प्रश्न
You are provided with four test tubes containing sugar solution, baking soda solution, tamarind solution, salt solution. Write down an activity to find the nature (acidic/basic/neutral) of each solution.
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उत्तर
Add blue litmus solution and then red litmus solution and note down the change in colour.
Sugar solution - No change in colour of blue or red litmus solution.
Baking soda solution - Turns red litmus blue.
Tamarind solution - Turns blue litmus red.
Salt solution - No change in colour of blue or red litmus solution.
Hence,
Sugar solution, salt solution - neutral
Baking soda solution - basic
Tamarind solution - acidic
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संबंधित प्रश्न
Name one natural source of the following acids:
(d) Tartaric acid
Give one example in the following case:
A hydrogen containing compound which is not an acid.
Identify the following solutions, whether they are acid or base.
| Solution | Change in Indicator | Acid/Base | ||
| Litmus | Phenolphthalein | Methyl orange | ||
| 1. | -- | No change | -- | |
| 2. | -- | -- | Orange colour turns red | |
| 3. | Red litmus turns blue | -- | -- | |
Give the name and formula of two : Volatile acids
Write the balanced equations for the reaction required to convert insoluble lead (II) oxide into insoluble lead chloride.
Classify the various types of Acids based on their sources.
Paheli observed that most of the fish in the pond of her village were gradually dying. She also observed that the waste of a factory in their village is flowing into the pond which probably caused the fish to die.
- Explain why the fish were dying.
- If the factory waste is acidic in nature, how can it be neutralised?
To Interpret:
CH4 and NH3, are not acids.
Explain the following:
H3PO3 is not a tribasic acid.
Draw the structure of Hydronium ion.
