Answer: Iron with molybdenum.
- A Iron with molybdenum
- B Vanadium(V) oxide only
- C Nickel with alumina
- D Platinum with rhodium
Correct answer: A. Iron with molybdenum
Explanation: The Haber process uses finely divided iron as the catalyst with molybdenum (or K<sub>2</sub>O/Al<sub>2</sub>O<sub>3</sub>) as a promoter to speed up the equilibrium.
Xenon tetrafluoride (XeF4) has six electron domains around xenon — four Xe–F bonds plus two lone pairs. The lone pairs occupy opposite axial positions, leaving the four fluorine atoms in a square-planar shape (Xe–F ≈ 194 pm). Image: ChemSim, Public Domain, via Wikimedia Commons.
Concept context
Covers the nitrogen family (Group 15), oxygen family (Group 16), halogens (Group 17), and noble gases (Group 18). One of the highest-weightage inorganic chapters in NEET and JEE - includes preparation and properties of HNO₃, H₂SO₄, interhalogens, and xenon compounds.