MCQ
Visible light will be absorbed by
- A$[Sc(H_2O)_3(NH_3)_{3}]^{3+}$
- B$[Ti(en)_2(NH_3)_2]^{4+}$
- ✓$[Cr(NH_3)_6]^{3+}$
- D$[Zn(NH_3)_6]^{2+}$
✓
Answer
Correct option: C.
$[Cr(NH_3)_6]^{3+}$
c
Transition metal complexes absorb visible light only when they have an incomplete d nutshell.
Transition metal complexes absorb visible light only when they have an incomplete d nutshell.
Also, when an electron can go from lower energy orbital to higher energy orbital, then they can absorb visible light.
In $\left[ Cr \left( NH _3\right)_6\right]^{3+}, Cr$ is present as $Cr ^{+3}$
Electronic configuration of $Cr { }^3=[A r] 3 d^3 4 s^0$
Now, since the complex has 3 unpaired electrons, excitation of electrons is possible \& therefore, it will absorb visible light.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Product $(A)$ of the above reaction is
→Internal energy is
On hydrolysis, which of the following carbohydrate give glucose only ?
Which of the following molecules has the maximum dipole moment ?
The compound is known by which of the following names
Given below are two statements:
→Statement $I$: Tropolone is an aromatic compound and has $8 \pi$ electrons.
Statement $II$: $\pi$ electrons of $ > C = O$ group in tropolone is involved in aromaticity.
In the light of the above statements, choose the correct answer from the options given below:
Reagent, $1 -$naphthylamine and sulphanilic acid in acetic acid is used for the detection of
→Which of the following compounds is chiral?
Given below are two statements:
Statement (I) : Oxygen being the first member of group 16 exhibits only -2 oxidation state.
Statement (II) : Down the group 16 stability of +4 oxidation state decreases and +6 oxidation state increases.
In the light of the above statements, choose the most appropriate answer from the options given below:
Statement (I) : Oxygen being the first member of group 16 exhibits only -2 oxidation state.
Statement (II) : Down the group 16 stability of +4 oxidation state decreases and +6 oxidation state increases.
In the light of the above statements, choose the most appropriate answer from the options given below:
Chloride ion and potassium ion are isoelectronic. Then