Question

In an activity teacher took a plastic mug. By making two holes he inserted two carbon

electrodes inside two rubber stoppers. The rods were connected to a 9 volt battery. The

mug was filled with water and dilute Sulphuric acid was added to it. Two test tubes were

inserted covering the rods and current was passed in the water. It was observed that

bubbles were

formed in

both the

rods.



Q1.1. Following reaction is being shown by the teacher to the students-

a.) Displacement Reaction

b.) Decomposition Reaction

c.) Precipitation Reaction

d.) Combination Reaction

1

Q1.2 The amount of Hydrogen produced in electrolysis is:

a.) Thrice of Oxygen

b.) Twice of Oxygen

c.) Same as Oxygen

d.) Four times of Oxygen

1

Q1.3. Dilute Sulphuric acid is added to water. The reason for its addition is that:

a.) It helps in making medium acidic

b.) It helps in dissociation of ions faster

c.) It gives more Hydrogen

d.) D.) It gives more Oxygen​

Answer 1

Answer:

In fig. Gas A is hydrogen and gas B is oxygen.