Question

2 doubts
1. In a displacement reaction between Copper Sulphate & Iron, will the amount of iron sulphate formed be equivalent to the amount of copper sulphate there was before in the test tube or equivalent to amount of Iron the nail contains

2. When we Burn a paper the heat is taken when the paper catch fire as well as realised after catching fire. So ,how it can be exothermic reaction​

Answer 1

Answer:

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