NEET Chemistry MCQs

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NEET Questions / Chemistry

According to VBT, the number of unpaired electrons in $Ni(CO)_4$ is:

Question Tags

📚 Subject:Chemistry

📑 Chapter:Chemical Bonding and Molecular Structure

🎯Topic:Valence Bond Theory

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :Valence Bond Theory, Coordination Compounds, Strong Field Ligands, Nickel Tetracarbonyl

Consider a complex [M(en) $_3$ ] $^{3+}$ , where 'en' is ethylenediamine. If the observed magnetic moment is 0 BM, what is the most likely d-electron configuration of the metal ion M $^{3+}$ ?

d $^5$ (high-spin)

d $^4$ (high-spin)

d $^6$ (low-spin)

d $^3$

Question Tags

📚 Subject:Chemistry

📑 Chapter:Coordination Compounds

🎯Topic:Crystal Field Theory

🎓 Ncert Level:Application

🎯Difficulty :Hard

⚡ Time Required :2 mins

🔄Ncert Concepts :Crystal Field Theory, Magnetic Moment, Strong Field Ligands, d-electron configurations

A strong field ligand leads to:

A small crystal field splitting energy

A large crystal field splitting energy

No crystal field splitting

A distorted geometry

Question Tags

📚 Subject:Chemistry

📑 Chapter:Coordination Compounds

🎯Topic:Crystal Field Theory

🎓 Ncert Level:Understanding

🎯Difficulty :Easy

⚡ Time Required :1 mins

🔄Ncert Concepts :Crystal Field Theory, Strong Field Ligands, Crystal Field Splitting Energy

What is the correct electronic configuration of the central atom in ${{\rm{K}}_4}{\rm{[Fe(CN}}{{\rm{)}}_6}{\rm{]}}$ based on crystal field theory?

${\rm{t}}_{2g}^4\,{\rm{e}}_{\rm{g}}^2$

${\rm{t}}_{2g}^6\,{\rm{e}}_{\rm{g}}^0$

${{\rm{e}}^3}\,{\rm{t}}_{\rm{2}}^3$

${{\rm{e}}^4}\,{\rm{t}}_{\rm{2}}^2$

Question Tags

📚 Subject:Chemistry

📑 Chapter:Coordination Compounds

🎯Topic:Crystal Field Theory

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :3 mins

🔄Ncert Concepts :crystal field theory, coordination complexes, electronic configuration, oxidation states, strong field ligands

Amongst ${\rm{Ni}}{\left( {{\rm{CO}}} \right)_4},\,\,{\left[ {{\rm{Ni}}{{\left( {{\rm{CN}}} \right)}_4}} \right]^{2 - }}{\rm{\;}}$ and ${\left[ {{\rm{NiC}}{{\rm{l}}_4}} \right]^{2 - }}$

$\left[ {{\rm{Ni}}{{\left( {{\rm{CO}}} \right)}_4}} \right],{\rm{\;\;}}{\left[ {{\rm{NiC}}{{\rm{l}}_4}} \right]^{2 - }}$ are diamagnetic and ${\left[ {{\rm{Ni}}{{\left( {{\rm{CN}}} \right)}_4}} \right]^{2 - }}$ is paramagnetic

${\left[ {{\rm{NiC}}{{\rm{l}}_4}} \right]^{2 - }},{\rm{\;}}{\left[ {{\rm{Ni}}{{\left( {{\rm{CN}}} \right)}_4}} \right]^{2 - }}$ are diamagnetic and $\left[ {{\rm{Ni}}{{\left( {{\rm{CO}}} \right)}_4}} \right]$ is paramagnetic

$\left[ {{\rm{Ni}}{{\left( {{\rm{CO}}} \right)}_4}} \right],{\rm{\;}}{\left[ {{\rm{Ni}}{{\left( {{\rm{CN}}} \right)}_4}} \right]^{2 - }}$ are diamagnetic and ${\left[ {{\rm{NiC}}{{\rm{l}}_4}} \right]^{2 - }}$ is paramagnetic

$\left[ {{\rm{Ni}}{{\left( {{\rm{CO}}} \right)}_4}} \right]$ is diamagnetic and ${\left[ {{\rm{NiC}}{{\rm{l}}_4}} \right]^{2 - }}{\rm{\;}},{\rm{\;}}{\left[ {{\rm{Ni}}{{\left( {{\rm{CN}}} \right)}_4}} \right]^{2 - }}$ are paramagnetic