JEE Mains · Chemistry · STD 12 - 5. Co-ordination chemistry
How many of the following metal ions have similar value of spin only magnetic moment in gaseous state? (Given: Atomic number: \(V , 23 ; Cr , 24 ; Fe , 26;Ni , 28)\) \(V ^{3+} \cdot Cr ^{3+}, Fe ^{2+}, Ni ^{3+}\)
- A \(4\)
- B \(2\)
- C \(6\)
- D \(8\)
Answer & Solution
Correct Answer
(B) \(2\)
Step-by-step Solution
Detailed explanation
\(\mu_{ s }=\sqrt{ n ( n +2)} BM \quad\) (n=no. of unpaired electrons) \(n\) \(V ^{3+}:[ Ar ] 3 d ^2 4 s ^0\) \(2\) \(Cr ^{3+}:[ Ar ] 3 d ^3 4 s ^0\) \(3\) \(Fe ^{2+}:[ Ar ] 3 d ^6 4 s ^0\) \(4\) \(Ni ^{3+}:[ Ar ] 3 d ^7 4 s ^0\) \(5\) \(Cr ^{3+}\) and \(Ni ^{3+}\) have same…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- Consider the following sulphure based oxoacids. \(H _{2} SO _{3}, H _{2} SO _{4}, H _{2} S _{2} O _{8} \text { and } H _{2} S _{2} O _{7} \text {. }\) Amongst these oxoacids, the number of those with peroxo \(( O - O )\) bond is \(..........\)JEE Mains 2022 Medium
- A metal complex with a formula \(\mathrm{MC} \ell_4 \cdot 3 \mathrm{NH}_3\) is involved in \(\mathrm{sp}^3 \mathrm{~d}^2\) hybridisation. It upon reaction with excess of \(\mathrm{AgNO}_3\) solution gives ' x ' moles of AgCl. Consider ' x ' is equal to the number of lone pairs of electron present in central atom of \(\mathrm{BrF}_5\). Then the number of geometrical isomers exhibited by the complex is ______.JEE Mains 2025 Hard
- Identify the structure of the final product (D) in the following sequence of the reactions.
Total number of \(\mathrm{sp}^2\) hybridised carbon atoms in product D is _______.JEE Mains 2025 Medium - The number of stereoisomers possible for \(\left[ Co ( ox )_{2}( Br )\left( NH _{3}\right)\right]^{2-}\) is ...... . \([ ox =\) oxalate \(]\)JEE Mains 2021 Medium
- Given below are two statements:
Statement I: Sucrose is dextrorotatory. However sucrose upon hydrolysis gives a solution having mixture of products. This solution showing laevorotation.
Statement II: Hydrolysis of sucrose gives glucose and fructose. Since the laevorotation of glucose is more than the dextrorotation of fructose the resulting solution becomes laevorotatory.
In the light of the above statements, choose the correct answer from the options given below.JEE Mains 2026 Easy - The correct electronic configuration and spin only magnetic moment (BM) of \(Gd ^{3+}( Z =64)\), respectively, areJEE Mains 2020 Medium
More PYQs from JEE Mains
- A particle \(A\) of mass \(‘m’\) and charge \(‘q’\) is accelerated by a potential difference of \(50\, V\). Another particle \(B\) of mass \(‘4\, m’\) and charge \(‘q’\) is accelerated by a potential difference of \(2500\, V\). The ratio of de-Broglie wavelength \(\frac{{{\lambda _A}}}{{{\lambda _B}}}\) is close toJEE Mains 2019 Medium
- Two identical spherical balls of mass \(M\) and radius \(R\) each are stuck on two ends of a rod of length \(2R\) and mass \(M\) (see figure). The moment of inertia of the system about the axis passing perpendicularly through the centre of the rod is
JEE Mains 2019 Hard - Let a triangle \(A B C\) be inscribed in the circle \(x ^{2}-\) \(\sqrt{2}(x+y)+y^{2}=0\) such that \(\angle B A C=\frac{\pi}{2}\). If the length of side \(A B\) is \(\sqrt{2}\), then the area of the \(\triangle ABC\) is equal toJEE Mains 2022 Medium
- A Carnot engine has efficiency of \(50 \%\). If the temperature of sink is reduced by \(40^{\circ} C\), its efficiency increases by \(30 \%\). The temperature of the source will be\(....K\)JEE Mains 2022 Medium
- Which of the following \(3 d -m e t a l\) ion will give the lowest enthalpy of hydration \((\Delta_{ hyd } H )\) when dissolved in water?JEE Mains 2022 Medium
- Let \(\vec{c}\) be the projection vector of \(\vec{b}=\lambda \hat{i}+4 \hat{k}, \lambda\gt0\), on the vector \(\vec{a}=\hat{i}+2 \hat{j}+2 \hat{k}\). If \(|\vec{a}+\vec{c}|=7\), then the area of the parallelogram formed by the vectors \(\vec{b}\) and \(\vec{c}\) is ________JEE Mains 2025 Medium