a) Saturated solution of copper sulphate
was prepared at 60 degrees Celsius and put
in 3 test tubes A,B,C
A is heated to 90 degree
B is heated to 20 degree
water is added to C
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(a) When a saturated solution of potassium chloride prepared at 60°C is allowed to cool at room
temperature, crystals of potassium chloride will be formed.
(b) Initially, sugar will obtained as water will get evaporated. But on dry heating sugar gets charred and
it turns black.

(c) The black coloured compound, iron sulphide is formed when a mixture of iron filings and sulphur
powder is heated strongly
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