Ms Deepika conducted a few experiments to explain the properties of metals and non-metals. She set up the experiments as shown in the given figure.
She noted her observations as :
I. No reaction will take place in beakers (iv) and (v).
II. `H_2` gas will be evolved in beakers (i), (ii) and (iii).
III. A vigorous reaction will take place in beaker (i) while no reaction will occur in beaker (ii).
IV. Two different gases will be evolved in beaker (iv).
The correct observations are
