Which of the following statements is/are correct?
(I) During the decomposition of an oxide into oxygen and metal vapour, entropy increases.
(II) Decomposition of an oxide is an endothermic change.
(III) To make 
negative, temperature should be high enough so that 
.
(IV) Decomposition of an oxide is exothermic change.
(V) During the decomposition process, entropy decreases.
Choose the correct answer from the options given below.
Text Solution
Verified by ExpertsD
I, II and III statements are true.
During the decomposition of an oxide into oxygen and metal vapour, entropy increases as gas is produced in the reaction.
Decomposition of an oxide is an endothermic change.
This is because it is reverse of combustion reaction and all combustion reactions are exothermic in nature. Since both 
and 
are positive, the temperature should be high enough so that 
and hence, 
is negative.
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