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Chemical Reaction

When copper s...

Question

When copper sulphate crystals are mixed in water, they ___________.

A

disappears

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B

started floating

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C

make the solution colourless

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D

none of the above

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Solution

The correct option is A disappears
The crystal of $C u S O_{4}$ completely dissolves (or fill in spaces between the particles) in water and disappears and imparts a bluish colour to the solution.

Hence the correct option is A.

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Similar questions

Q. You are given the following materials:
(i) Iron nails
(ii) Copper sulphate solution
(iii) Barium chloride solution
(iv) Copper powder
(v) Ferrous sulphate crystals
(vi) Quicklime

Identify the type of chemical reaction taking place when:
(a) Barium chloride solution is mixed with copper sulphate solution and a white precipitate is observed.
(b) On heating copper powder in air in a china dish, the surface of copper powder turns black.
(c) On heating green coloured ferrous sulphate crystals, reddish brown solid is left and smell of a gas having odour of burning sulphur is experienced.
(d) Iron nails when left dipped in blue colour copper sulphate solution become brownish in colour and the blue colour of copper sulphate fades away.
(e) Quick lime reacts vigorously with water releasing a large amount of heat.
Write chemical equations for each one of the above reactions.

Q. When copper sulphate crystals are heated in a test tube, we observe :

What happens when a chunk of copper sulphate crystal is kept in a beaker filled with water?

Q. When a crystal of copper sulphate is placed at the bottom of a beaker containing water, the water slowly turns blue. Why?

(a) What happens when copper sulphate crystals are heated strongly? Explain with help of an equation.

(b) What happens when a few drops of water are added to anhydrous copper sulphate? Explain with the help of an equation.

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