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- 1. Multiple Choice
Potable water is
transparent.
transparent and colourless.
transparent, colourless and has taste.
transparent, colourless, has taste and is free from germs.
- 2. Multiple Choice
Water used for chemical reactions in a laboratory is purified by ____.
- 3. Multiple Choice
Polluted water can cause ______________.
malaria
diarrhoea
cancer
heart disease
- 4. Multiple Choice
Water is called _______.
universal solvent
universal solute
universal solution
all of these
- 5. Multiple Choice
Vitreous membrane in the human eye contains _____ water.
2%
34%
56%
99%
- 6. Multiple Choice
What does the picture represent?
Evaporation
Condensation
Water cycle
Precipitation
- 7. Multiple Choice
Which is an example of gaseous state of matter?
Water vapour
Hail
Snow
Dew
- 8. Multiple Choice
The gases that cause acid rain are _____________.
oxygen and carbon dioxide
nitrogen dioxide and sulphur dioxide
noble gases and sulphur dioxide
oxygen and sulphur dioxide
- 9. Multiple Choice
What can you infer from picture shown here?
Water is needed for plants.
Plants need warmth.
Plants release water vapour.
Indoor plants should be covered.
- 10. Multiple Choice
One litre of sea water contains _____ of dissolved salts.
24 g
26 g
29 g
30 g
- 11. Multiple Choice
Arrange the four stages of removal of suspended impurities in the correct order.
(ii) 🡪 (iii) 🡪(iv) 🡪(i)
(iii) 🡪(ii) 🡪(iv) 🡪(i)
(iv) 🡪(i) 🡪(iii) 🡪(ii)
(i) 🡪(ii) 🡪(iii) 🡪(iv)
- 12. Multiple Choice
The purest form of natural water is _____.
rain water
well water
spring water
sea water
- 13. Multiple Choice
Teeth and skeleton have _____ water.
50%
23%
2%
98%
- 14. Multiple Choice
Solutions are _______ mixtures.
heterogeneous
homogeneous
saturated
supersaturated
- 15. Multiple Choice
What helps in the formation of a solution?
Two substances should be mutually soluble in one another.
Solute should be in the form of powder.
Temperature of the solvent should be high.
All of the above.
- 16. Multiple Choice
Fish die in shallow ponds in summer because
more carbon dioxide is produced.
solubility of air in water decreases with a rise in temperature.
ponds dry up.
the hot weather kills all aquatic plants.
- 17. Multiple Choice
Who is known as ‘Waterman of India’?
Mr. Rajendra Singh
Mr. Salim Ali
Mr.Varghese Kurian
Mr. M. S. Swaminathan
- 18. Multiple Choice
A sugar solution which cannot dissolve more of a solute at a given temperature is called ____.
solution
saturated solution
unsaturated solution
supersaturated solution
- 19. Multiple Choice
Identify the picture where water is conserved.
- 20. Multiple Choice
What concentration of salt is present in sea water?
26 g/l
35 g/l
55 g/l
89 g/l
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