JEE Mains · Chemistry · STD 12 - 5. Co-ordination chemistry
Which of the following species is not paramagnetic ?
- A \(NO\)
- B \(CO\)
- C \(O_2\)
- D \(B_2\)
Answer & Solution
Correct Answer
(B) \(CO\)
Step-by-step Solution
Detailed explanation
The electronic configuration of the given species is as follows:…
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
- The quantity which changes with temperature is:JEE Mains 2024 Medium
- During Kinetic study of reaction \(2 A+B \rightarrow C+D\), the following results were obtained :
Based on above data, overall order of the reaction is _______.\(A[M]\) \(B[M]\) initial rate of formation of \(D\) \(i\) \(0.1\) \(0.1\) \(6.0 \times 10^{-3}\) \(ii\) \(0.3\) \(0.2\) \(7.2 \times 10^{-2}\) \(ii\) \(0.3\) \(0.4\) \(2.88 \times 10^{-1}\) \(iv\) \(0.4\) \(0.1\) \(2.40 \times 10^{-2}\) JEE Mains 2024 Medium - Identify the INCORRECT statements from the following:
A. Notation \( {}_{12}^{24}Mg \) represents 24 protons and 12 neutrons.
B. Wavelength of a radiation of frequency \( 4.5 \times 10^{15} s^{-1} \) is \( 6.7 \times 10^{-8} m \).
C. One radiation has wavelength \(=\lambda_1(900 nm)\) and energy \(= E _1\). Other radiation has wavelength \(= \lambda_2(300 nm)\) and energy \(= E _2 \cdot E _1: E _2=3: 1\).
D. Number of photons of light of wavelength 2000 pm that provides 1 J of energy is \( 1.006 \times 10^{16} \).
Choose the correct answer from the options given below:JEE Mains 2026 Medium - Consider the following complexes. \((A)\) \(\left[\mathrm{CoCl}\left(\mathrm{NH}_3\right)_5\right]^{2+}\), \(\quad\) \((B)\) \(\left[\mathrm{Co}(\mathrm{CN})_6\right]^{3-} \text {, }\) \((C)\) \(\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5\left(\mathrm{H}_2 \mathrm{O}\right)\right]^{3+}\), \(\quad\) \((D)\) \(\left[\mathrm{Cu}\left(\mathrm{H}_2 \mathrm{O}\right)_4\right]^{2+}\) The correct order of \(A\), \(B\), \(C\) and \(D\) in terms of wavenumber of light absorbed is _______.JEE Mains 2024 Medium
- The correct \(IUPAC\) name of \(\left[\mathrm{PtBr}_2\left(\mathrm{PMe}_3\right)_2\right]\) is _______.JEE Mains 2024 Medium
- Among the following oxides of 3d elements, the number of mixed oxides are _______
\(Ti_{2}O_{3}, V_{2}O_{4}, Cr_{2}O_{3}, Mn_{3}O_{4}, Fe_{3}O_{4}, Fe_{2}O_{3}, Co_{3}O_{4}\)JEE Mains 2026 Medium
More PYQs from JEE Mains
- Arrange the following bonds according to their average bond energies in descending order \(\mathrm{C}-\mathrm{Cl}, \mathrm{C}-\mathrm{Br}, \mathrm{C}-\mathrm{F}, \mathrm{C}-\mathrm{I}\)JEE Mains 2020 Hard
- \(\mathop {\lim }\limits_{x \to 0} \frac{{{e^{{x^2}}} - \,\cos \,x}}{{{{\sin }^2}\,x}}\) is equal toJEE Mains 2015 Hard
- If \(\int {\frac{{{x^2} - x + 1}}{{{x^2} + 1}}{e^{{{\cot }^{ - 1}}}}{}^x\,dx = A(x)} {e^{{{\cot }^{ - 1}}}}{}^x + C,\) then \(A(x)\) is equal toJEE Mains 2013 Hard
- Let \(i=\sqrt{-1}\). If \(\frac{(-1+i \sqrt{3})^{21}}{(1-i)^{24}}+\frac{(1+i \sqrt{3})^{21}}{(1+i)^{24}}=k\), and \(n =[| k |]\) be the greatest integral part of \(| k |\). Then \(\sum_{ j =0}^{ n +5}( j +5)^{2}-\sum_{ j =0}^{ n +5}( j +5)\) is equal to ........ .JEE Mains 2021 Hard
- \(25\, mL\) of the given \(HCl\) solution requires \(30\, mL\) of \(0.1\, M\) sodium carbonate solution. What is the volume of this \(HCl\) solution required to titrate \(30\, mL\) of \(0.2\, M\) aqueous \(NaOH\) solution? .............. \(\mathrm{mL}\)JEE Mains 2019 Hard
- A straight wire carrying a current of \(14\,A\) is bent into a semicircular are of radius \(2.2\,cm\) as shown in the figure. The magnetic field produced by the current at the centre \((O)\) of the arc. is \(.........\,\times 10^{-4}\, T\)
JEE Mains 2023 Easy