JEE Mains · Chemistry · STD 12 - 4. d and f- block elements
The incorrect statement is :
- A In manganate and permanganate ions, the \(\pi\) \(-\)bonding takes place by overlap of \(p-\)orbitals of oxygen and \(d-\)orbitals of manganese
- B Manganate ion is green in colour and permanganate ion in purple in colour
- C Manganate and permanganate ions are paramagnetic
- D Manganate and permanganate ions are tetrahedral
Answer & Solution
Correct Answer
(C) Manganate and permanganate ions are paramagnetic
Step-by-step Solution
Detailed explanation
Option \(1)\) Manganate \(\Rightarrow MnO _{4}^{2-}\) Permanganate \(\Rightarrow MnO _{4}^{-}\) \(2 \times 2 P _{\pi}-3 d _{\pi}\) \(1 \times 2 P _{\pi}-4 P _{\pi}\) \((2)\) \(MnO _{4}^{2-} \Rightarrow\) green \(MnO _{\stackrel -4} \Rightarrow\) purple/violet \((3)\) Manganate…
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
- How many electrons would be required to deposit \(6.35\,g\) of copper at the cathode during the electrolysis of an aqueous solution of copper sulphate? (Atomic mass of copper \(= 63.5\,u,\) \(N_A=\) Avogadro's constant)JEE Mains 2014 Hard
- The correct statement among the following is :JEE Mains 2026 Hard
- The compound that is white in color is _______.JEE Mains 2024 Medium
- For the following gas phase equilibrium reaction at constant temperature,
\(NH_3(g) \rightleftharpoons \frac{1}{2} N_2(g)+\frac{3}{2} H_2(g)\)
If the total pressure is \(\sqrt{3} \) atm and the pressure equilibrium constant \(\left( K _{ p }\right)\) is 9 atm , then the degree of dissociation is given as \(\left(x \times 10^{-2}\right)^{-1 / 2}\).
The value of \(x\) is __________ (Nearest integer)JEE Mains 2026 Easy - For a first order reaction, the time required for completion of \(90\, \%\) reaction is \('x'\) times the half life of the reaction. The value of \('x'\) is \(........\,.\) (Given: \(\ln 10=2.303\) and \(\log 2=0.3010\) )JEE Mains 2022 Medium
- The results given in the below table were obtained during kinetic studies of the following reaction: \(2 A + B \longrightarrow C + D\)
\(X\) and \(Y\) in the given table are respectively :Experiment \([ A ] / molL ^{-1}\) \([ B ] / molL ^{-1}\) Initial \(rate/molL\) \(^{-1}\) \(\min ^{-1}\) \(I\) \(0.1\) \(0.1\) \(6.00 \times 10^{-3}\) \(II\) \(0.1\) \(0.2\) \(2.40 \times 10^{-2}\) \(III\) \(0.2\) \(0.1\) \(1.20 \times 10^{-2}\) \(IV\) \(X\) \(0.2\) \(7.20 \times 10^{-2}\) \(V\) \(0.3\) \(Y\) \(2.88 \times 10^{-1}\) JEE Mains 2020 Hard
More PYQs from JEE Mains
- Two masses of \(3.4\) kg and \(2.5\) kg are accelerated from an initial speed of \(5\) m/s and \(12\) m/s, respectively. The distances traversed by the masses in the \(5^\text{th}\) second are \(104\) m and \(129\) m, respectively. The ratio of their momenta after \(10\) s is \(\dfrac{x}{8}\). The value of \(x\) is ________.JEE Mains 2026 Hard
- An engine operating between the boiling and freezing points of water will have \(1.\) efficiency more than \(27 \%\) \(2.\) efficiency less than the efficiency a Carnot engine operating between the same two temperatures. \(3.\) efficiency equal to \(27 \%\) \(4.\) efficiency less than \(27 \%\)JEE Mains 2023 Medium
- A straight wire \(AB\) of mass \(40\,g\) and length \(50\,cm\) is suspended by a pair of flexible leads in uniform magnetic field of magnitude \(0.40\,T\) as shown in the figure. The magnitude of the current required in the wire to remove the tension in the supporting leads is ...........\(A\). (Take \(g=10\,ms ^{-2}\) ).
JEE Mains 2023 Medium - The following reaction occurs in the Blast Furnace where iron ore is reduced to iron metal \(F{e_2}{O_3}\left( s \right) + 3CO\left( g \right) \rightleftharpoons 2Fe\left( l \right) + 3C{O_2}\left( g \right)\) Using the Le Chatelier 's principle, predict which one of the following will not disturb the equilibrium ?JEE Mains 2017 Hard
- Considering the principal values of the inverse trigonometric functions, \(\sin ^{-1}\left(\frac{\sqrt{3}}{2} x+\frac{1}{2} \sqrt{1-x^2}\right),-\frac{1}{2} \lt x \lt \frac{1}{\sqrt{2}}\), is equal toJEE Mains 2025 Easy
- Let \(\alpha\) be a solution of \(x^2+x+1=0\), and for some \(a\) and \(b\) in
\(\mathbb{R},\left[\begin{array}{lll}4 & \mathrm{a} & \mathrm{b}\end{array}\right]\left[\begin{array}{ccc}1 & 16 & 13 \\ -1 & -1 & 2 \\ -2 & -14 & -8\end{array}\right]=\left[\begin{array}{ccc}0 & 0 & 0\end{array}\right]\). If \(\frac{4}{\alpha^4}\) \(+\frac{\mathrm{m}}{\alpha^{\mathrm{a}}}+\frac{\mathrm{n}}{\alpha^{\mathrm{b}}}=3\), then \(\mathrm{m}+\mathrm{n}\) is equal toJEE Mains 2025 Medium