Which one of the following statements is incorrect? (A) Bond dissociation enthalpy of H2 is highest — JEE Mains Chemistry Past Papers Chemistry Question

Question

Which one of the following statements is incorrect? (A) Bond dissociation enthalpy of H2 is highest among diatomic gaseous molecules which contain a single bond (B) Dihydrogen is produced on reacting zinc with HCl as well as NaOH(aq). (C) At around 2000 K, the dissociation of dihydrogen into its atoms is nearly 8.1%. (D) Atomic hydrogen is produced when H2, molecules at a high temperature are irradiated with UV radiation. fuEufyf[kr dFkuksa esa ls dkSu&lk ,d xyr gS\ (1) f}ijek.kqd xSlh; v.kqvksa] ftuesa ,dy vkcU/k gS] H2 dh vkcU/k fo;kstu ,UFkSYih mPpre gSA (2) ftad ij HCl rFkk NaOH(aq) nksuksa dh vyx&vyx vfHkfØ;k ls gkbMªkstu mRué gksrk gSA (3) 2000 K ds vkl&ikl gkbMªkstu dk mlds ijek.kqvksa esa fo;ktu yxHkx 8.1% gksrk gSA (4) H2 ds v.kqvksa dk mPp rki ij ijkcSaxuh fodj.kksa ls fdj.ku djus ij ijekf.od gkbMªkstu mRié gksrh gSA