question_answer 43)

  The following reaction is used for the preparation of oxygen gas in the laboratory Which of the following statement(s) is/are correct about the reaction? (i) It is a decomposition reaction and endothermic in nature (ii) It is a combination reaction (iii) It is a decomposition reaction and accompanied by release of heat (iv)It is a photochemical decomposition reaction and exothermic in nature                

Answer:

  (a) It is a decomposition reaction and endothermic in nature because decomposition ofrequires heat for products formation.