JEE Main 2016ChemistryD And F Block ElementsProperties Of Transition ElementseasyMCQ

JEE Main 2016 — D And F Block Elements Question with Solution

From: JEE Main 2016 (Online) 10th April Morning Slot

Question

The transition metal ions responsible for color in ruby and emerald are, respectively :

Choose an option

Show full solutionCorrect option: D
Correct answer
DCr3+    and    Cr3+

Step-by-step explanation

On addition of impurities to the colourless gemstones, brilliant colours are produced. On addition of chromium to colourless corundum (Al2O3), a red ruby is formed. Red colour ruby is obtained when Cr3+ ions replace Al3+ ions in the octahedral sites of corundum. A green emerald emerges when chromium is added to colourless beryl (Be3Al2(SiO3)6). Green colour emerald is obtained when Cr3+ ions replace Al3+ in the octahedral site of beryl.

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About this question

This is a previous-year question from JEE Main 2016, covering the D And F Block Elements chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.