1.

Statement: 1 For the change occuring during roasting of sphalerite, the entropy change is negtive Statement-2. Two different compounds of Zine are formed during roasting

Answer»

Both I and II are correct and II is correct explanation of I
Both in and II are correct and li is not correct explanation of l
is true but ll is false
is false but II is true

Solution :Statement-I`ZnS_((s))+3O_(2(g)) to ZnO_((s))+2SO_(2(g))` (correct)
`:.` Number of moles of gases PRODUCTS decreases so `Deltas=-ve`
Statement-II : During roasting TWO DIFFERENT compounds of Zn are formed.


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