Q

Confused! kindly explain, The INCORRECT statement is :

The INCORRECT statement is :

• Option 1)

the gemstone,ruby,has $Cr^{3+}$ ions occupying the octahedral sites of beryl.

• Option 2)

the spin-only magnetic moment of $\left [ Ni\left ( NH_{3} \right ) _{4}\left ( H_{2}O \right )_{2}\right ]^{2+}$ is $2.83\; BM.$

• Option 3)

the color of $\left [ CoCl\left ( NH_{3} \right ) _{5}\right ]^{2+}$is violet as it absorbs the yellow light.

• Option 4)

the spin-only magnetic moments of $\left [ Fe\left ( H_{2}O \right ) _{6}\right ]^{2+}$ and $\left [ C_{r}\left ( H_{2}O \right ) _{6}\right ]^{2+}$ are nearly similar.

Views

(1)  In ruby, the gemstone has $Cr^{3+}$ ions occupying the octahedral sites of Aluminium oxide $\left ( Al_{2}O_{3} \right ),Cr^{3+}$ ion normally occupied by $Al^{3+}$ ion

$\left [ Ni\left ( NH_{3} \right ) _{4}\left ( H_{2}O \right )_{2}\right ]^{2+}\rightarrow N_{1}^{12+}\rightarrow 3d^{8}=2\; unpaired\; e^{s}\Rightarrow \mu _{m}=\sqrt{n\left ( n+2 \right )}=\; \; 2.83\; B.M$

(3) The complementary colour of violet is yellow.

(4) $Fe^{2+}\rightarrow 3d^{6}=4 \; unpaired \; e^{-}$

$Cr^{2+}\rightarrow 3d^{4}=4 \; unpaired \; e^{-}$

Option 1)

the gemstone,ruby,has $Cr^{3+}$ ions occupying the octahedral sites of beryl.

Option 2)

the spin-only magnetic moment of $\left [ Ni\left ( NH_{3} \right ) _{4}\left ( H_{2}O \right )_{2}\right ]^{2+}$ is $2.83\; BM.$

Option 3)

the color of $\left [ CoCl\left ( NH_{3} \right ) _{5}\right ]^{2+}$is violet as it absorbs the yellow light.

Option 4)

the spin-only magnetic moments of $\left [ Fe\left ( H_{2}O \right ) _{6}\right ]^{2+}$ and $\left [ C_{r}\left ( H_{2}O \right ) _{6}\right ]^{2+}$ are nearly similar.

Exams
Articles
Questions