Which of the reactions represent oxidation processes according to the limited definition of oxidation
`2Mg_((s))+O_(2(g))rarr2MgO_((s))`
`S_((s))+O_(2(g))rarr SO_(2(g))`
`2HgO_((s))Deltararr2Hg_((l))+O_(2(g))`
Both (1) and (2)

For the system S (s) + O_(2)(g) rarr SO_(2)(g) ?

For the first order reaction 2N_(2)O_(5)(g) rarr 4NO_(2)(g) + O_(2)(g)

For the reaction 2HgO(s) rarr 2Hg(l) + O_(2)(g)

For the reaction 2HgO(s) rarr 2Hg(l) + O_(2)(g)

Calculate the standard enthalpy of reaction for the following reaction using the listed enthalpies of reaction : 3Co(s)+2O_(2)(g)rarrCo_(3)O_(4)(s) 2 Co(s)+O_(2)(g)rarr2CoO(s)," "DeltaH_(1)^(@)=-475.8 kJ 6CoO(s)+O_(2)(g)rarr2Co_(3)O_(4)(s),DeltaH_(2)^(@)=-355.0 kJ

Identify the species undergoing oxidation & reduction and oxidising agent & reducing agent in the reaction. I_(2)(g)+H_(2)S(g) rarr 2HI(g)+S(s)

When charcoal burns in air signs of DeltaH and DeltaS "are " 2C_((s)) + O_(2(g)) rarr 2CO_((g))

Justify that the reaction is a redox reaction. " "2Cu_(2)O(s)+Cu_(2)S(s) rarr 6Cu(s)+SO_(2)(g)

For each reaction, wheter the sign of Delta S (entropy) is positive or negative ? (a) Ni(s)+4CO(g)rarr Ni(CO)_(4)(g) (b) 4Fe(s)+3O_(2)(g)rarr 2Fe_(2)O(s) (c ) H_(2)(g)+S(s)rarr H_(2)S(g) (d) 2NO(g)+O_(2)(g)rarr 2NO_(2)(g)

Two reactions are given below : (i) CO_((g))+(1)/(2)O_(2(g))rarrCO_(2(g)) (ii) Ag_(2)O_((s)) rarr 2Ag_((s))+(1)/(2)O_(2(g)) Which of the following statements is true ?