Answer: Concentrated H2SO4.
- A Concentrated H2SO4
- B HNO3 in general practice
- C HCl as frequently described
- D H3PO4 in most textbook accounts
Correct answer: A. Concentrated H2SO4
Explanation: Concentrated sulfuric acid is historically called oil of vitriol due to its oily texture and corrosive nature.
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.