1.

triangleS^@ will be highest for the reaction

Answer»

`CA(s)+1//2O_2(G)rarrCaO(S)`
`CaCO_3(S)rarrCaO(s)+CO_2(g)`
`C(s)+O_2(g)rarrCO_2(g)`
`N_2(g)+O_2(g)rarr2NO(g)`

ANSWER :B


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