Which one of the following is correct order of given isotopes? I. T₂>D₂>P₂ (order of boiling point) II. T₂>D₂>P₂ (order of bond energy) III. T₂=D₂=P₂ (order of bond length) IV. T₂ < D₂ < P₂ (order of reactivity with Cl ₂ )

Step-by-step solution

Protium (P) , deuterium (D) and tritium (T) are the three isotopes of hydrogen. These isotopes follow the order in different contexts as shown below : T₂>D₂>P₂ [Order of boiling point (BP)] T₂>D₂>P₂ [Order of bond energy .( BE ) ]T₂=D₂=P₂ [Order of bond length .( BL ) ]T₂ < D₂ < P₂ [Order of reactivity with Cl ₂ ] Hence, all the given order are correct.