Page 3 - 2. HA (Lab WS_Expt_4)

Final Light blue Colourless Colourless Light blue

Initial Light green Colourless Light green Blue

D

Final Colourless Colourless Dark green Colourless

Which student noted the colour change in all the four test tubes correctly?
(a) A (b) B (c) C (d) D.

Solutions of FeSO4, ZnSO4, CuSO4 and Al2(SO4)3 solutions were separately taken
3. in four test tubes and some iron nails were placed in each of the solutions. After a few
minutes, it would be observed that the colour of
(a) all the four solutions changed.
(b) solution of ZnSO4, CuSO4 and Al2(SO4)3 changed and that of FeSO4 did not
change.
(c) solution of ZnSO4 and Al2(SO4)3 only changed.
(d) copper sulphate solution only changed.
4. A student performed the following four experiments:

He would find the formation of solid deposition on
metal in experiments
(a) II, III (b) I, III
(c) I, II, III (d) II, III, IV.
5. Four students were assigned separately the experiment of interaction of an iron nail
with a solution of copper sulphate. Each group recorded the observations as [ given
below in the table. Which group of students recorded the observations correctly?

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