Answer: Contact process.
- A Contact process
- B Haber process
- C Solvay process
- D Frasch process
Correct answer: A. Contact process
Explanation: The contact process oxidises SO<sub>2</sub> to SO<sub>3</sub> using V<sub>2</sub>O<sub>5</sub> catalyst, then absorbs SO<sub>3</sub> in water to give H<sub>2</sub>SO<sub>4</sub>.
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.