Question

Q. A liquid compound X of molecular mass 18 u can be obtained from a number of natural sources. All the
animals and plants need liquid X for their survival. When an electric current is passed through 200 grams of
pure liquid X under suitable conditions, then 178 grams of gas Y and 22 grams of gas Z are produced. Gas
Yis produced at the positive electrode whereas gas Z is obtained at the negative electrode. Moreover, gas Y
supports combustion whereas gas Z burns itself causing explosions.
(a) Name (i) liquid X (it) gas y, and (iii) gas Z.
(b) What is the ratio of the mass of element Z to the mass of element Y in the liquid X ?
(c) Which law of chemical combination is illustrated by this example ?
(d) Name two sources of liquid X
(e) State an important use of Y in our life.
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Answer 1

Answer:

Water , Hydrogen , Oxygen

Explanation:

a) I)liquid X = Water

ii) gas Y = Oxygen

iii) gas Z =Hydrogen

b) The ratio of mass of element Z to Y in X is , like this , H2O => 2:1 and by mass =>2:16

c) Law of Conservation of mass and Law of Combustion

d) Mountain , Ocean , Soil

e) Oxygen is most important element and gas because of this life exist you can find other planets if there is shortage of oxygen it will be directly say that life will rarely exist there , because of this plants and organisms can respire and breathes .