Which of the following statements is correct | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The electronic configurations are as follows:$Zn^{2+} (Z=30): [Ar] 3d^{10} 4s^0$. It has no unpaired electrons,so it is colourless.$Ni^{2+} (Z=28)

Vedclass · Accepted Answer

Only $Zn^{2+}$ is colourless and $Ni^{2+}$ and $Cr^{3+}$ are coloured

Vedclass · Answer

(A) The electronic configurations are as follows:$Zn^{2+} (Z=30): [Ar] 3d^{10} 4s^0$. It has no unpaired electrons,so it is colourless.$Ni^{2+} (Z=28): [Ar] 3d^8 4s^0$. It has two unpaired electrons,so it is coloured.$Cr^{3+} (Z=24): [Ar] 3d^3 4s^0$. It has three unpaired electrons,so it is coloured.Therefore,only $Zn^{2+}$ is colourless,while $Ni^{2+}$ and $Cr^{3+}$ are coloured.

Which of the following statements is correct regarding the ions $Zn^{2+}$,$Ni^{2+}$,and $Cr^{3+}$? (Atomic numbers: $Zn = 30$,$Ni = 28$,$Cr = 24$)

Similar Questions

Which of the following represents the correct order of the given properties?

In chromyl chloride,the number of $d$-electrons present on chromium is same as in (Given atomic number of $Ti = 22, V = 23, Cr = 24, Mn = 25, Fe = 26$)

In the following pairs,the one in which both transition metal ions are colourless is

The isoelectronic pair of ions is

Write a brief note on the electronic configurations of the transition elements.

Vedclass Test Series

Exam Paper Generator

Online Exam Module