JEE Main 2016Chemistryd and f Block ElementsEasyMCQ

JEE Main 2016d and f Block Elements Question with Solution

JEE Main 2016 (10 Apr Online)

Question

Which of the following are the transition metal ions responsible for colour in ruby and emerald respectively?

Choose an option

Show full solutionCorrect option: C
Correct answer
CCr3+ and Cr3+

Step-by-step explanation

Ruby is Al2O3 in which Red colour is obtained when Cr+3 is replacing Al+3 ions in octahedral sites. Emerald is Be3Al2SiO36 in which green colour is obtained when Cr+3 is replacing Al+3 in octahedral site.

Practice this on the real CBT interface

Solve this JEE Main question (and the rest of the d and f Block Elements chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.

Solve interactively →

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.