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  • The transition metal ions responsible for colour in Ruby and emerald are:Option: 1 <img alt="\mathrm{Cr^{3+}\; and\; Cr^{3+}}" src="/latex-image/?%5C

The transition metal ions responsible for colour in Ruby and emerald are:

Option: 1

\mathrm{Cr^{3+}\; and\; Cr^{3+}}


Option: 2

\mathrm{Co^{2+}\; and\; Cu^{+}}


Option: 3

\mathrm{Cr^{3+}\; and\; Co^{2+}}


Option: 4

\mathrm{Cu^{+}\; and\; Cr^{3+}}


Answers (1)

best_answer

Ruby is \mathrm{Al}_2 \mathrm{O}_3 in which red colour is obtained when \mathrm{Cr}^{+3} is replacing \mathrm{Al}^{+3} ions in octahedral sites. Emerald is \mathrm{Be}_3 \mathrm{Al}_2\left(\mathrm{SiO}_3\right)_6 in which green colour is obtained when \mathrm{Cr}^{+3} is replacing \mathrm{Al}^{+3} in octahedral site.

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Rishabh

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