Question

Take a plastic mug. Drill two holes at its base and fit rubber stoppers in these holes.
 Insert carbon electrodes in these rubber stoppers as shown below.
 Connect these electrodes to a 6 volt battery.
 Fill the mug with water such that the electrodes are immersed. Add a few drops of dilute sulphuric to the water.
 Take two test tubes filled with water and invert them over the two carbon electrodes.
 Switch on the current and leave the apparatus undisturbed for sometime. Observe for any type of gas formation.
i) Identify the gases evolved at anode and cathode.
ii) Why few drops of dilute sulphuric acid is added to water?
iii)What type of reaction is this?

a) Combination reaction
b) Decomposition reaction
c) Displacement reaction
d) Rancidity

iv) The ratio of gas released at anode to the gas released at cathode is
a) 1:2 b) 1:1 c) 2:1 d) 2:2
3. Which of the following are present in a dilute aqueous solution of Hydrochloric acid? a) H3O+ + Cl-
b) H3O+ + OH-
c) Cl- + OH-
d) Unionized HCl

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Answer 1

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Answer 2

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