1.

Oxygen will directly react with each of the following elements exceptA. `S`B. `P`C. `Cl`D. `Na`

Answer» Correct Answer - 3
Since the oxides of chlorine are strongly endothermic compounds and have positives free energies of formation dioxygen does not react directly with dichlorine. Others do reacts
`S(s)+O_(2)(g) overset(Delta)(rarr) SO_(2)(g)`
`P_(4)(s)+5O_(2)(g) overset(Delta)(rarr) P_(4)O_(10) (s)`
`4Na(s)+O_(2)(g) overset(Delta)(rarr) 2Na_(2)O(s)`


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