1.a)- A solution of substance X is used for white washing. What is the substance X ? State the chemical reaction of X with water.
b)- Why does the colour of copper sulphate solution change when an iron nail is dipped in it ?
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The substance X used for white washing is quick lime (calcuim oxide)
Ca+ H2O = Ca( OH)2 + heat
(b) becoz of displacement reaction
fe + cuso4 = feso4 + cu
the blue colour is due to cu ion and green colour is due to fe
Ca+ H2O = Ca( OH)2 + heat
(b) becoz of displacement reaction
fe + cuso4 = feso4 + cu
the blue colour is due to cu ion and green colour is due to fe
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Answered by
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X = calcium hydroxide
Ca(OH)2 + CO2 -------Caco3 + H2O
Ca(OH)2 + CO2 -------Caco3 + H2O
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