Conversion of frost to water vapour is an example of
endothermic reaction
exothermic reaction
photochemical reaction
none of the above
Energy is absorbed in the form of heat when converting frost to water vapour. Hence it is an endothermic reaction.
What is an oxidation reaction? Give an example of oxidation reaction.Is oxidation an exothermic or an endothermic reaction?
(a) What do you understand by exothermic and endothermic reactions ?
(b) Give one example of an exothermic reaction and one of an endothermic reaction.
(c) Which of the following are endothermic reactions and which are exothemic reactions ?
(i) Buring of natural gas (ii) Photosynthesis
(iii) Electrolysis of water (iv) Respitation
(v) Decomposition of calcium carbonate