Advertisements
Advertisements
प्रश्न
A jumbled word is given here. Write the correct form of the word.
QUIFERA
Advertisements
उत्तर
AQUIFER
APPEARS IN
संबंधित प्रश्न
Name the four main sources of water.
State the importance of water cycle in nature.
Give balanced chemical equation for the reaction of water with Sodium oxide.
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 harmful substances dissolved in water .
What are its causes and how can water pollution be controlled ?
What do you understand by soft water?
Of the total water available on the earth, fresh water forms ______ percent.
Give a reason why alcohol and water form a miscible mixture while oil & water do not.
Select the correct answer of the following statement:
A decahydrate crystal.
Give a balanced equation for the following conversion:
Magnesium bicarbonate in temporary hard water to magnesium carbonate by boiling.
Select the correct word from the words in option to complete the sentence:
Dissolved air in water contains a ____ percentage of oxygen than ordinary air.
Give a reason for the following:
A crusty ‘boiler scale’ is formed in boilers, when hard water is used.
How is the life of organisms living in water affected when water gets polluted?
Why should we not throw cooking oil and fats down the drain?
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?
Wells are fed by ______.
Look at the figure.
Write down activities shown in this figure in which water is being used.
Why is there a need for conserving water? Give two reasons.
