🧪 Chemistry · p-Block Elements (Groups 15 to 18) · NEET & JEE

Tincture of iodine, used as an antiseptic, is a solution of iodine in:

Answer: Alcohol.

A Water
B Glycerol
C Ether
D Alcohol

Correct answer: D. Alcohol

Explanation: Tincture of iodine is a solution of iodine (with potassium iodide) in alcohol; it is a well-known antiseptic.

Xenon tetrafluoride XeF4: a central xenon bonded to four fluorine atoms in a square-planar arrangement with two lone pairs above and below, Xe-F bond length 194 pm.

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.

Read the full p-Block Elements (Groups 15 to 18) notes →

Tincture of iodine, used as an antiseptic, is a solution of iodine in:

Concept context

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