Chemistry
Fill in the blanks:
(a) Water has ………………… density and …………….. volume at 4°C.
(b) Freezing mixture contains ……………… and ……………. .
(c) The solubility of a gas in water …………….. with rise in temperature and ………………….. with rise in pressure.
(d) ………………. is the purest form of natural water.
(e) Use of excessive ……………… by farmers causes water pollution.
(f) Boiling removes the ………………. hardness of water.
(g) Water turns the colour of anhydrous copper sulphate ………………. .
(h) The sticky substance formed when soap is added to hard water is …………………. .
Water
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Answer
(a) maximum, minimum
(b) salt, ice
(c) decreases, increases
(d) Rain water
(e) fertilizers
(f) temporary
(g) blue
(h) scum
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