Chemistry
Write true or false for the following statements:
(a) Water is an element. ……………
(b) Alum is commonly used for removing suspended impurities. ……………
(c) Tap water does not contain dissolved impurities. ……………
(d) Distillation is a good method for purifying water for town supply. ……………
Water
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Answer
(a) False
Correct Statement — Water is a compound. Hydrogen and Oxygen are present in a fixed proportion in a water molecule.
(b) True
(c) False
Correct Statement — Tap water usually contains some dissolved salts, minerals, and chlorine.
(d) False
Correct Statement — Distillation is good method to get water for medicinal purposes and in laboratories.
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Related Questions
Conservation of water can be done by :
- rainwater harvesting
- planting trees and plants
- avoiding misuse of water
- all of the above
Fill in the blanks:
(a) Water is a …………… solvent.
(b) …………… is the purest form of natural water.
(c) Sand and dust are …………… impurities in water.
(d) Sea water has a high concentration of ……………
(e) Water covers nearly …………… of the surface of the earth.
(f) Evaporation of rain water leaves …………… residue.
(g) …………… is the chemical added to water to remove the tiny suspended particles.
(h) A …………… is a uniform mixture of a solute and a solvent.
(i) Ice, water and steam have different physical states but are chemically ……………
(j) Boiling kills most of the …………… in water.
(k) The elements present in the molecules of water are …………… and ……………
Match the following:
Column A Column B (a) A solution in which more solute can be dissolved. (1) Solution (b) A medium in in which a substance dissolves. (2) Unsaturated solution (c) A homogeneous mixture. (3) Solvent Name two water-borne diseases.