Blue crystals of copper sulphate on heating in a dry test tube become colourless. Give reason.
a. Why can not a chemical change be normally reversed?
b. Why is it always essential to balance a chemical equation?
c. What happens when CO2 gas is passed through lime water and why does it disappear on passing excess CO2?
d. Can rusting of iron take place in distilled water?
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blue crystals of copper contains water so it is in blue when we heat it it turns white a) some chemical changes can become normal but applying temperature and pressure b) it is essential because all chemicals in nature wants to become neutral c) if co2 passes through lime water it becomes calcium bi corbinite d) yes iron will rust in distilled water THANK YOU PLEASE VOTE ME I STRUGGLED HARD
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