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Byju's Answer
Standard X
Chemistry
Chemical Properties of Metals
Which one is ...
Question

Which one is not observed when aluminium is added to solution of copper sulphate?


A

The solution is blue in the beginning

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B

The final solution becomes colourless

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C

A brown mass is deposited on the surface of Aluminium

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D

The final solution becomes light green

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Solution

The correct option is D

The final solution becomes light green


The final solution becomes colourless and not light green since aluminium sulphate is colourless.


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Q. When an aluminium strip is kept immersed in freshly prepared ferrous sulphate solution taken in a test tube, the change which is observed is:
(1) light green solution slowly turns colourless
(2) the lower end of the test tube becomes slightly warm
(3) a colourless gas with smell of burning sulphur is observed
(4) light green solution changes to blue
Q.

When zinc granules are added to copper sulphate solution then solution becomes colourless.


Q. When sodium hydroxide solution is added to a freshly prepared solution of ferrous sulphate, a green precipitate of ferrous hydroxide is formed which on standing becomes brown because :
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
Q. A strip of copper is placed in four different colourless salt solutions. Which one of the solutions will finally turn blue?
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