For a reversible gaseous reaction \[{{N}_{2}}+3{{H}_{2}}\rightleftharpoons 2N{{H}_{3}}\] at equilibrium, if some moles of \[{{H}_{2}}\] are replaced by same number of moles of \[{{T}_{2}}\](T is tritium, isotope of H and assume isotopes do not have different chemical properties) without affecting other parameter, then:

• A. the sample of ammonia obtained after sometime will be radioactive.
• B. moles of \[{{N}_{2}}\] after the change will be different as compared to moles of \[{{N}_{2}}\] present before the change
• C. the value of \[{{K}_{p}}\] or \[{{K}_{c}}\]will change
• D. the average molecular mass of new equilibrium will be same as that of old equilibrium