Why is the amount of gas collected in one of the test tube in activity 1.7 double?
Activity 1.7 deals with the electrolysis of water using battery. It lyses the water into its component molecule viz. Hydrogen and oxygen.
Substance X used for whitewashing
Substance X in the question is Calcium oxide also called as “Quick lime”.
Calcium oxide reacts with water and form calcium hyroxide and relases energy as heat. Calcium hydroxide is also called as “slaked lime”.
Activity 1.8 Ncert Science class 10
Silver chloride decomposition in the presence of light.
Activity 1.7 Ncert Science class 10
The activity asks to electrolyse water using a 6-volt battery and check the volume of gases liberated at anode and cathode. The activity also asks to bring the gas at the flame and see what happens.