Lab manual previous year questions — task. Science CBSE, Class 10.

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1.

On adding iron strip in copper sulphate solution, the reaction takes long time, to make it happen fast we can

add more iron strips.
add more copper sulphate solution.
heat the container of reactants.
heat iron and add in copper sulphate.

2.

The colour of the coating obtained on a zinc rod on dipping in aqueous copper sulphate solution will be

blue
brown
white
green

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