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प्रश्न
Fill in the blank:
The sample of hard water which lathers with soap after boiling and filtration contains _____.
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उत्तर
The sample of hard water which lathers with soap after boiling and filtration contains calcium bicarbonate.
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संबंधित प्रश्न
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 |
Two gases found dissolved in natural water are
Define
Henry's law
What will happen if the total supply of potable water is finished?
Select the correct answer of the following statement:
A solution which can pass through a filter paper but not through a semipermeable membrane.
Complete the statement by filling the blank with the correct word from the option.
Solubility of most solids ___ with rise in temperature.
Complete the statement by filling the blank with the correct word from the option.
Kerosene & water form a _______ mixture.
Explain the following observation:
Washing-soda become coated with a white powder when left exposed to the atmosphere.
If, at some place, it did not rain for a very long period of time, what would be its effect on the life of the people there?
Fill in the blanks in the following statements using words given in the box.
| air, handpumps, cholera, water, large, ground |
A very ______ number of our people defecate in the open. It may cause ______ pollution and soil pollution. Both the surface water and ______ water get polluted. ______ water is the source for wells, tubewells and ______. Thus it becomes the most common route for ______ borne diseases like ______, dysentery, etc.
