Question

When electricity passed through water, then change V occurs which leads to the formation of two gases W and X. On the other hand , when water is heated strongly , then a change Y takes place leading to the formation of gas Z. a) What are gases i) W ii) X iii) Z.? b) What type of change is i) V and ii) Y?

Answer 1

a.i. Hydrogen
ii.Oxygen
iii.Water Vapour or Steam
b.i.Chemical Change
ii.Physical Change

Answer 2

Answer:

Your question is not clear and appears to be incomplete.

Here is explanation about the two reactions:

Change V is electrolysis of water that releases gases, O2 and H2. 2H2O = 2H2 + O2

Change Y is vaporisation when liquid water is changes to water vapour.

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