Question

Match the bond enthalpies given in column II with the molecules given in column I and mark the appropriate choice.
`{:(,"Column I",,"Column II "),((A),"Hydrogen "(H_(2)),(i),498.0 " kJ mol"^(-1)),((B),"Oxygen"(O_(2)),(ii),946.0" kJ mol"^(-1)),((C),"Nitrogen"(N_(2)),(iii),435.8 " kJ mol"^(-1)):}`
A. `(A)to(i), (B)to(ii), (C) to (iii)`
B. `(A) to (iii), (B) to (ii), (C ) to (i) `
C. `(A) to (i), (B) to (iii), (C ) to (ii)`
D. `(A) to (iii), (B) to (i), (C ) to (ii)`

Answer 1

Correct Answer - D
The order of bond enthalpies of the bonds is given as Bond order `propto` Bond enthalpy
Hence, single bond enthalpy ` lt` double bond enthalpy ` lt` triple bond enthalpy
`H - H lt O = O lt N -= N`