Observe the given experimental set-up and select the correct statement(s).

I. A gas which burns with pop sound will be evolved in beakers I, II and III.
II. A colour change from colourless to green will be observed in beaker IV.
III. Reaction will occur but no colour change will be observed in the solution of beaker V.
IV. Gas will be evolved only in beaker II.
V. Reaction will occur in all the beakers but colour change will be observed only in beakers III and V.

Options

A. I, III and IV only
B. II, IV and V only
C. III only
D. I only

Answer

C

Explanation

Beaker I: A gas which burns with a pop sound will be evolved.
Beaker II : Magnesium does not react with cold water.
Beaker III : Copper does not react with dil HCI.
Beaker IV : Iron (Fe) being less reactive than zinc, does not displace zinc from its solution.
Beaker V: Aluminium being more reactive than zinc displaces zinc from zinc sulphate solution to form aluminium sulphate which has the same colour as that of zinc sulphate.