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प्रश्न
Fill in the blank:
The type of water softened by addition of washing soda is ______.
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उत्तर
The type of water softened by addition of washing soda is both types.
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संबंधित प्रश्न
Give reason On opening a bottle of a cold drink, a fizz sound is heard.
Match the statements in column A with that in column B.
| Column A | Column B |
| (a) deliquescent substance | (1) sodium bicarbonate |
| (b) hygroscopic substance | (2) magnesium chloride |
| (c) efflorestance substance | (3) conc. sulphuric acid |
| (d) substance causing temporary hardness | (4) washing soda |
Give one word for the following statement:
The gaseous form of water found in air .
Give one word for the following statement:
A mixture of common salt and ice .
Two gases found dissolved in natural water are
Explain why:
Fused CaCl2 or conc. H2SO4 is used in a desiccator.
Answer in your own words.
Why is there a shortage of water even though it occupies about 71% of the earth’s surface?
Give a reason for the following:
Efflorescence is minimum during humid conditions.
Think and suggest some ways to minimise waste and pollutants at their source, taking your home as an example.
In which of the following activities will you use minimum amount of water?
