On adding a few pieces of Zn metal to aqueous $C u S O_{4},$ some observations were recorded. Identify which of the following observations is/are not true and choose the correct option.
(i) Light blue solution turns light green
(ii) Red-brown coloured solid copper settles down
(iii) Light blue colour of solution disappears
(iv) A greyish metallic deposit of Cu metal was

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Q. Aluminium sulphate and copper sulphate solutions were taken in two test tubes I and II respectively. Iron filings were then added to both the solutions. The four students A, B, C and D recorded their observations in the form of a table as given below.

Student	Aluminium sulphate solution (I)	Copper sulphate solution (II)
A	Colourless changes to light green	Blue colour of the solution is retained
B	Colour of colourless solution does not change	Blue colour of the solution changes to light green
C	Colourless solution changes to light blue	Blue colour of the solution changes to colourless
D	Colour of colourless solution remains unchanged	Blue colour of the solution fades away

The correct set of observations have been recorded by the students :
(1) A
(2) B
(3) C
(4) D

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Select the correct answers :

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Q. zia added a few zinc granules to ferrous sulphate solution and recorded his observations . which of the following are correct? "a) pale green colour of solution turns black.
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