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प्रश्न
A jumbled word is given here. Write the correct form of the word.
CHARREGE
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उत्तर
RECHARGE
APPEARS IN
संबंधित प्रश्न
Cleaning of water is a process of removing ______.
Name the gas produced when fossil fuel is burnt.
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 .
Answer the following question:
What is the chemical composition of water ? Give its molecular formula.
How is rain produced?
Which property of water enables it to modify the climate?
State the importance of the solubility of CO2 and O2 in water.
Explain why:
Air dissolved in water contains a higher proportion of oxygen.
Compare the effect of soaps and detergents on hard water.
Name the solute, solvent & solution in the statement – ‘sodium chloride dissolves in water to give sodium chloride solution’. Define each of the terms in italics.
Explain why oil spills have an adverse effect on marine life.
State the importance of water for all general uses.
Unscramble the words and fill in the blanks.
- ondencsaonti ______
- vaeionorpat ______
- ecippitatrino ______
______ plays a vital role in the evolution and survival of life.
A jumbled word is given here. Write the correct form of the word.
QUIFERA
From where do the following usually get water? In which form is water present in them?
Plants
Pick from the following one chemical used to disinfect water.
Think and suggest some ways to minimise waste and pollutants at their source, taking your home as an example.
Construct a crossword puzzle of your own using the keywords.
