Question

Priyanka added few Cu turning to 50 mL CuSO4 solution in a test tube. The current observations for any colour change made by her is:

(1 Point)

(a) pale green solution turned colourless

(b) colourless solution turned blue

(c) blue solution turned colourless

(d) blue solution remained blue​

Answer 1

Answer:

Aluminium is more reactive than copper hence, It displaces Copper from its sulphate Solution in order to form Aluminum Sulphate. The Aluminum Sulphate solution hence formed is colouless. That is why the Blue colour of Copper sulphate disappears and the solution becomes Colourless.

Explanation:

blue solution remained blue is the answer

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Answer 2

Answer:

Required correct option is the blue solution remained blue.

Explanation:

The observations made by Priyanka can be explained as follows:

(a) If the pale green solution turned colorless, it means that all the copper ions in the solution were displaced by the copper turning. The resulting solution would be a colorless solution of sulfuric acid.

(b) If the colorless solution turned blue, it would mean that copper ions were formed as a result of the displacement reaction between copper turning and copper sulfate. The blue color is due to the formation of copper sulfate.

(c) If the blue solution turned colorless, it would mean that all the copper ions were displaced by the copper turning, resulting in a colorless solution of sulfuric acid.

(d) If the blue solution remained blue, it would indicate that there was no displacement of copper ions from the copper sulfate solution by the copper turning.

Therefore, the correct observation would be option (d) - the blue solution remained blue.

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