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प्रश्न
Explain why:
If distilled water is kept in a sealed bottle for a long time, it leaves etchings on the surface of the glass.
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उत्तर
If distilled water is kept in a sealed bottle for a long time, it etches the surface of glass because substances which are apparently insoluble in water actually dissolve in minute traces in water.
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संबंधित प्रश्न
Name the four main sources of water.
Name the gas produced when steam is passed over hot coke.
.................... is the purest form of natural water.
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 |
Complete the statement by filling the blank with the correct word from the option.
The ratio of hydrogen & oxygen in water is ____.
Condensation results in the formation of dew on grass.
Water changes to ice at ______.
In the coastal areas, wind current moves from the sea towards the land during the day; but during the night it moves from land to the sea. Discuss the reason.
From where do the following usually get water? In which form is water present in them?
Aquifer
What is water?
