JEE Main 2022 · 28 Jun · Shift 1 · Chemistry Q69

← JEE Main 2022 · 28 Jun · Shift 1

ChemistrySingle correct+4 / -1Question 69 of 90

Given below are two statements :

Statement I : $\mathrm{[Ni(CN)_4]^{2-}}$ is square planar and diamagnetic complex, with dsp $^2$ hybridization for Ni but $\mathrm{[Ni(CO)_4]}$ is tetrahedral, paramagnetic and with sp $^3$ -hybridication for Ni.

Statement II : $\mathrm{[NiCl_4]^{2-}}$ and $\mathrm{[Ni(CO)_4]}$ both have same d-electron configuration, have same geometry and are paramagnetic.

In light the above statements, choose the correct answer form the options given below :

Both Statement I and Statement II are true.

Both Statement I and Statement II are false.

Statement I is correct but statement II is false.

Statement I is incorrect but statement II is true.

Answer and worked solution

Official answer: B

Statement I is false: $\mathrm{[Ni(CO)_4]}$ is $d^{10}$ and diamagnetic. Statement II is false: $\mathrm{[NiCl_4]^{2-}}$ is $d^8$ (paramagnetic) while $\mathrm{[Ni(CO)_4]}$ is $d^{10}$ .

(B)

Topics:Valence bond theory Magnetic properties and colour

← Previous question Next question →

JEE Main 2022 · 28 Jun · Shift 1, Chemistry question 69