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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 the source from which litmus solution is obtained. What is the use of this solution?
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.
What is the common name of water soluble bases?
The label on the bottle of chemical is spoiled. How will you find whether the chemical is acidic or not?
Tartaric acid is a ______ acid.
Give the name and formula of two : Strong monobasic acids
Define a base.
Match the acids given in column (A) with their correct source given in column (B)
| Column (A) | Column (B) |
| (a) Lactic acid | Tamarind |
| (b) Acetic acid | Lemon |
| (c) Citric acid | Vinegar |
| (d) Tartaric acid | Curd |
The correct way of making a solution of acid in water is to ______.
Curd contains ______ acid.
