JEE MAIN - Chemistry (2025 - 28th January Morning Shift - No. 13)
The metal ion whose electronic configuration is not affected by the nature of the ligand and which gives a violet colour in non-luminous flame under hot condition in borax bead test is
$\mathrm{Cr}^{3+}$
$\mathrm{Ti}^{3+}$
$\mathrm{Ni}^{2+}$
$\mathrm{Mn}^{2+}$
Explanation
$\mathrm{Ni}^{+2}$ gives violet coloured bead in non-luminous flame under hot conditions. $\mathrm{Ni}^{+2}$ has $\mathrm{d}^8$ configuration which does not depend on nature of ligand present in octahedral complex.
$$\mathrm{Ni}^{+2}: \mathrm{t}_{2 \mathrm{~g}}{ }^6 \mathrm{e}_{\mathrm{g}}{ }^2$$
Comments (0)
