Question

Which of the following statements is not correct?

• A. The first ionization enthalpy of molecular oxygen is almost identical with that of xenon
• B. Chlorine with excess ammonia gives nitrogen as one of the products
• C. \(\mathrm{XeF_6}\) on complete hydrolysis gives Xe, HF and \(\mathrm{O_2}\)
• D. The oxidizing agent used in Deacon's process is atmospheric oxygen

Hint:

Complete hydrolysis of xenon hexafluoride is \[ \boxed{ \mathrm{XeF_6+3H_2O\rightarrow XeO_3+6HF} } \] The product is xenon trioxide, not elemental xenon.

Answer 1

The Correct Option is C

Step 1: Examine each statement. \[ \boxed{\text{(A) Correct}} \] The first ionization enthalpy of \(\mathrm{O_2}\) is nearly equal to that of Xe. \[ \boxed{\text{(B) Correct}} \] With excess ammonia, \[ 3\mathrm{Cl_2}+8\mathrm{NH_3} \rightarrow 6\mathrm{NH_4Cl}+\mathrm{N_2} \] Hence nitrogen is formed. \[ \boxed{\text{(D) Correct}} \] In Deacon's process, atmospheric oxygen oxidizes HCl to chlorine.

Step 2: Check Statement (C). Complete hydrolysis of \[ \mathrm{XeF_6} \] produces \[ \boxed{\mathrm{XeO_3}} \] and HF. It does not produce Xe and \(\mathrm{O_2}\). Hence Statement (C) is incorrect. Therefore, \[ \boxed{(C)} \] is the correct answer.