JEE Mains · Chemistry · STD 12 - 5. Co-ordination chemistry
The homoleptic and octahedral complex of \(Co ^{2+}\) and \(H _2 O\) has \(.......\) unpaired electron(s) in the \(t _{2 g }\) set of orbitals.
- A \(1\)
- B \(2\)
- C \(3\)
- D \(4\)
Answer & Solution
Correct Answer
(A) \(1\)
Step-by-step Solution
Detailed explanation
\(Co ^{2+}: 3 d ^7\) configuration \(t _{2 g }^{221} e _{ g }^{11}\)
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
- Integrated rate law equation for a first order gas phase reaction is given by: (where \(P_i\) is initial pressure and \(P_t\) is total pressure at time \(t\) )JEE Mains 2024 Hard
- \([ Fe ( CN )_{6}]^{3-}\) should be an inner orbital complex. Ignoring the pairing energy, the value of crystal field stabilization energy for this complex is \((-)\;\dots \;\Delta_{\circ}\).JEE Mains 2022 Medium
- An organic compound "\(x\)" where molar ratio of C, O and H are equal, on treatment with \(50\%\) KOH under reflux followed by acidification produced "\(y\)". The most likely structure of "\(y\)" is:
[Molar mass of '\(x\)' is \(58\) g mol\(^{-1}\)]JEE Mains 2026 Hard - Correct order of basic strength of Pyrrole.
,Pyridine
,and Piperidine
is _______.JEE Mains 2024 Medium - Identify correct conversion during acidic hydrolysis from the following :
(A) starch gives galactose.
(B) cane sugar gives equal amount of glucose and fructose.
(C) milk sugar gives glucose and galactose.
(D) amylopectin gives glucose and fructose.
(E) amylose gives only glucose.
Choose the correct answer from the options given below :JEE Mains 2025 Medium - Given below are two statements :- Statement \(I\) :- Methyl orange is a weak acid. Statement \(II\) :- The benzenoid form of methyl orange is more intense/deeply coloured than the quinonoid form. In the light of the above statement, choose the most appropriate answer from the options given below :-JEE Mains 2023 Medium
More PYQs from JEE Mains
- Let \(S\) be the set of all values of \(\lambda\), for which the shortest distance between the lines \(\frac{x-\lambda}{0}=\frac{y-3}{4}=\frac{z+6}{1}\) and \(\frac{x+\lambda}{3}=\frac{y}{-4}=\frac{z-6}{0}\) is \(13\) Then \(8\left|\sum_{\lambda \in S} \lambda\right|\) is equal toJEE Mains 2023 Medium
- If the integral \(\int {\frac{{\cos \,8x + 1}}{{\cot \,2x - \tan \,2x}}} dx = A\,\cos \,8x + k,\) where \(k\) is an arbitrary constant, then \(A\) is equal toJEE Mains 2013 Hard
- If \(\int \limits_0^1\left(x^{21}+x^{14}+x^7\right)\left(2 x^{14}+3 x^7+6\right)^{1 / 7} d x=\frac{1}{l}(11)^{m / n}\) where \(l, m , n \in N , m\) and \(n\) are coprime then \(l+m+n\) is equal to \(...........\).JEE Mains 2023 Hard
- A solid sphere of radius \(4\) cm and mass \(5\) kg is rotating (rotation axis is passing through the centre of the sphere) with an angular velocity of \(1200\) rpm. It is brought to rest in \(10\) s by applying a constant torque. The torque applied and the number of rotations it made before it comes to rest are _______ and _______ respectively.JEE Mains 2026 Medium
- Which one of the following chemical agent is not being used for dry-cleaning of clothes?JEE Mains 2021 Medium
- A circular coil of radius \(2\) cm and \(125\) turns carries a current of \(1\) A. The coil is placed in a uniform magnetic field of magnitude \(0.4\) T. The axis of the coil makes an angle of \(30°\) with the direction of the magnetic field. The torque acting on the coil is \(\alpha \times 10^{-4}\) N.m. The value of \(\alpha\) is ______.
(\(\pi=3.14\))JEE Mains 2026 Medium