The heat enegry required to ionise the following molecules is given as follows: `N_(2)(g) overset(DeltaH_(1))rarr N_(2)^(o+(g),O_(2)(g) overset(DeltaH_(2))rarrO_(2)^(o+(g)` `Li_(2)(g) overset(DeltaH_(3))rarrLi_(2)^(o+(g),C_(2)(g) overset(DeltaH_(4))rarrC_(2)^(o+(g)` Arrange the heat terms in decreasing order of enegry:A. `DeltaH_(1) gt DeltaH_(3) gt DeltaH_(2) gt DeltaH_(4)`B. `DeltaH_(2) gt DeltaH_(3) gt DeltaH_(1) gt DeltaH_(4)`C. `DeltaH_(3) gt DeltaH_(4) gt DeltaH_(1) gt DeltaH_(2)`D. `DeltaH_(3) gt DeltaH_(1) gt DeltaH_(4) gt DeltaH_(2)`

The heat enegry required to ionise the following molecules is given as

1.	The heat enegry required to ionise the following molecules is given as follows: `N_(2)(g) overset(DeltaH_(1))rarr N_(2)^(o+(g),O_(2)(g) overset(DeltaH_(2))rarrO_(2)^(o+(g)` `Li_(2)(g) overset(DeltaH_(3))rarrLi_(2)^(o+(g),C_(2)(g) overset(DeltaH_(4))rarrC_(2)^(o+(g)` Arrange the heat terms in decreasing order of enegry:A. `DeltaH_(1) gt DeltaH_(3) gt DeltaH_(2) gt DeltaH_(4)`B. `DeltaH_(2) gt DeltaH_(3) gt DeltaH_(1) gt DeltaH_(4)`C. `DeltaH_(3) gt DeltaH_(4) gt DeltaH_(1) gt DeltaH_(2)`D. `DeltaH_(3) gt DeltaH_(1) gt DeltaH_(4) gt DeltaH_(2)`
Answer» Enthalpy of ionisation depends upon the size of molecules. Larger the size lesser will be ionisation energy.

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