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

Question

The transition metal ions responsible for color in ruby and emerald are, respectively : (A) Cr3+ and Co3+ (B) Co3+ and Cr3+ (C) Co3+ and Co3+ (D) Cr3+ and Cr3+

Tardigrade Admin · Accepted Answer

Ruby is Al2O3 in which Red colour is obtained when Cr+3 is replacing Al+3 ions in octahedral sites. Emerald is Be3Al2 (SiO3)6 in which green colour is obtained when Cr+3 is replacing Al+3 in octahedral site.

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

$C r^{3 +}$ and $C o^{3 +}$

$C o^{3 +}$ and $C r^{3 +}$

$C o^{3 +}$ and $C o^{3 +}$

$C r^{3 +}$ and $C r^{3 +}$

Ruby is $A l_{2} O_{3}$ in which Red colour is obtained when $C r^{+ 3}$ is replacing $A l^{+ 3}$ ions in octahedral sites. Emerald is $B e_{3} A l_{2} (S i O_{3})_{6}$ in which green colour is obtained when $C r^{+ 3}$ is replacing $A l^{+ 3}$ in octahedral site.

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

Cr3+ and Co3+

Co3+ and Cr3+

Co3+ and Co3+

Cr3+ and Cr3+

Ruby is Al2​O3​ in which Red colour is obtained when Cr+3 is replacing Al+3 ions in octahedral sites. Emerald is Be3​Al2​(SiO3​)6​ in which green colour is obtained when Cr+3 is replacing Al+3 in octahedral site.

$C r^{3 +}$ and $C o^{3 +}$

$C o^{3 +}$ and $C r^{3 +}$

$C o^{3 +}$ and $C o^{3 +}$

$C r^{3 +}$ and $C r^{3 +}$

Ruby is $A l_{2} O_{3}$ in which Red colour is obtained when $C r^{+ 3}$ is replacing $A l^{+ 3}$ ions in octahedral sites. Emerald is $B e_{3} A l_{2} (S i O_{3})_{6}$ in which green colour is obtained when $C r^{+ 3}$ is replacing $A l^{+ 3}$ in octahedral site.