Indentify the reactions that occur in photochemical smog .
(i) ` CH_2 = O + H_2 to CH_3 OH`
(ii) `NO_2(g) overset(hv)(to) NO(g) + O(g) , O(g) + O_2(g) to O_3 (g) `
(iii) `3CH_4 + 2O_3 to 3CH_2 = O + 3H_2O`
(iv) `NO(g) + O_3 (g) to NO_2 (g) + O_2 (g) `

In which of the following reactions heterogeneous catalysis is involved? (i) 2SO_2(g) + O_2(g) overset(NO(g))to 2SO_3(g) (ii) 2SO_2 (g) + O_2(g) overset(Pt(s))to 2SO_3(g) (iii) N_2(g) + 3H_2(g) overset(Fe(s))to 2NH_3(g) (iv) CH_3COOCH_3(l) + H_2O(g) overset(HCl(l))to CH_3COOH(aq) + CH_3OH (aq) options- a). (i), (iii) b) (ii), (iii), (iv) c) (i), (ii), (iii) d) (iv)

For which of the reactions, Delta S is not positive : I_2(s) rarr I_2(g) , CuO(s)+H_2(g) rarr Cu(s)+H_2 O(l) , 2 O_3(g) rarr 3 O_2(~g) , CH_4(g)+2 O_2(g) rarr CO_2(g)+2 H_2 O(g)

Given : N_2(g) + 3H_2(g) iff 2NH_3(g), K_1 N_2(g) + O_2(g) iff 2NO(g), K_2 H_2(g) + 1/2 O_2(g) iff H_2O(g), K_3 The equilibrium constant for, 2NH_3(g) + 5/2 O_2(g) iff 2NO(g) + 3H_2O(g) will be :

Calculate the heat of formation of methanol (CH_3OH) from thhe following data: CH_3OH(l) + 3/2O_2(g) to CO_2(g) + 2H_2O (l),Delta =-726 kJ C(s) + O_2(g) to CO_2(g) , DeltaH = -394 kJ H_2(g) + 1/2 O_2(g) to H_2O(l) , Delta H = -286 kJ

Write the expression for: 2 N_2O(g)rarr 4 NO_2(g) + O_2(g) ?

The elementary reaction O_3(g) + O(g) rarr 2 O_2(g) is