Question

12.
is called a universal solvent.
(A) Water
(B) Alcohol
(C) Petrol
(D) Ether
13.
Water is often treated with chlorine to:
(C) kill germs in it (D) make it colourle-
14.
(A) make it sweet (B) make it salty
The chemical formula of ice is:
(A) H
(B) O,
(C) HO
(D) H2O2
15.
Water, ice and steam are all:
(D) elements
(B) mixtures
(C) compounds
(D) none of these
16.
Water in its pure form is a:
(B) bad conductor of heat
(A)good conductor of heat
(D) none of these
(C)good conductor of electricity
Water is made of two elements, which are:
(A) both solids
(B) both liquids
(C) both gases
(D) one liquid and the other a gas
18. For rusting of iron to take place, are required.
(A) O, and Co, (B) H20 and N, (C) H,0 and 0, (D) H,O and H,
19. The water table of a place.
(A) changes from time to time
(B) changes from palce to place
(C) goes down when rains are less
(D) all of these
20. Which of the following is the most important factor in balancing the amount of fresh water
on earth?
(A) water cycle
(B) greenhouse effect
(C) WWTP
(D) transpiration
21. Which property of water is used while washing clothes?
(A) odour
(B) colour
(C) solubility (D) none of these
22. Which of the following is NOT soluble in water?
(A) salt
(B) sugar
(C) oxygen (D) none of these
23. By burning which of the following elements would you get water?
(A) Hydrogen (B) Oxygen
(C) Carbon (D) Nitrogen​

Answer 1

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