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Q.

Which of the following reactions will liberate heat

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a

Burning Magnesium ribbon

b

Copper sulphate and Iron

c

Burning Camphor

d

All of these

answer is D.

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Detailed Solution

a) During burning of magnesium ribbon heat energy releases.

b) In the displacement reaction of copper sulphate and iron heat energy releases.

c) During burning of camphor also heat energy releases so above all are exothermic reactions. 

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