From the following data at `25^(@) C`
`{:("Reaction" ,, Delta_(r) H^(@) kJ//mol) , ((1)/(2) H_(2) (g) + (1)/(2) O_(2) (g) to OH (g) ,, 42), (H_(2) (g) + (1)/(2) O_(2) (g) to H_(2) O (g) ,, -242), (H_(2) (g) to 2 H (g) ,, 436) , (O_(2) (g) to 2 O(g) ,, 495):}`
Which of the following statement(s) is/are correct : Statement(a) : `Delta_(r) H^(@) ` for the reaction `H_(2) O (g) to 2 H(g) + O(g)` is 925 kJ/mol
Statement (b) : `Delta_(r) H^(@) ` for the reaction `OH(g) to H_(2) (g) + O(g) ` is 502 kJ/mol
Statement(c) : Enthalpy of formation of H(g) is – 218 kJ/mol
Statement(d) : Enthalpy of formation of OH(g) is 42 kJ/mol

Options

A. Statement c
B. Statement a, b, d
C. Statement b,c
D. Statement a, d

Answer

D