Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • The correct order of intensity of colors of the compounds is :Option: 1 <img alt="\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}>\left[\mathrm{NiCl}_{4}\right]^{2-}>\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}"

The correct order of intensity of colors of the compounds is :
Option: 1 \left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}>\left[\mathrm{NiCl}_{4}\right]^{2-}>\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}
Option: 2 \left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}>\left[\mathrm{NiCl}_{4}\right]^{2-}>\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}
Option: 3 \left[\mathrm{NiCl}_{4}\right]^{2-}>\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}>\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}
Option: 4 \left[\mathrm{NiCl}_{4}\right]^{2-}>\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}>\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}

Answers (1)

best_answer

Intensity of color is due to greater number of photons during d-d transitions. These transitions will be greater in complexes having lesser splitting because of low energy barrier.

The given complexes can be arranged in order  of their splitting on the basis of complex type and also the ligand involved as

\\\left[N{i}\left(CN)_{4}\right]^{2-}>\left[N_{i}\left(H_{2} O\right)_{6}\right]^{2+}>\left[N_{i} Cl_{4}\right]^{2-}\right.\\ \text{Square planar}\: \: \: \: \: \: \: \text{Octahedral}\: \: \: \: \: \: \: \: \: \text{Tetrahedral}\\ \text{Strongest ligand}\: \: \: \: \: \: \text{weaker ligand}\: \: \: \: \: \text{Weakest ligand}

So, the order of intensity is

\left[\mathrm{NiCl}_{4}\right] ^{2-}>\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}>\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}

Hence, the correct answer is option (3)

Posted by

sudhir.kumar

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

JEE Main 2025 session 2 answer key out for BArch, BPlanning; response sheet on jeemain.nta.nic.in
anam-khan

JEE Mains 2025 Paper 2 Answer Key LIVE: BArch final answer key PDF expected soon at jeemain.nta.nic.in
anam-khan

JEE Main 2025 response sheet errors: Delhi HC allows student to apply for JEE Adv, seeks NTA explanation

Latest Question