JEE Mains · Chemistry · STD 11 - 4. Chemical bonding and molecular structure
Among the following species, the diamagnetic molecule is
- A \(O_2\)
- B \(NO\)
- C \(B_2\)
- D \(CO\)
Answer & Solution
Correct Answer
(D) \(CO\)
Step-by-step Solution
Detailed explanation
\(CO\) is diamagnetic in nature due to absence of any unpaired electron.
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 spin only magnetic moment of \(\left[ Mn \left( H _2 O \right)_6\right]^{2+}\) complexes is \(........B.M.\) (Nearest integer)(Given : Atomic no. of \(Mn\) is \(25\) )JEE Mains 2023 Medium
- Consider the following single step reaction in gas phase at constant temperature. \(2 \mathrm{~A}_{(\mathrm{g})}+\mathrm{B}_{(\mathrm{g})} \rightarrow \mathrm{C}_{(\mathrm{g})}\) The initial rate of the reaction is recorded as \(r_1\) when the reaction starts with \(1.5 \mathrm{~atm}\) pressure of \(\mathrm{A}\) and \(0.7 \mathrm{~atm}\) pressure of B. After some time, the rate \(r_2\) is recorded when the pressure of \(C\) becomes \(0.5 \mathrm{~atm}\). The ratio \(r_1: r_2\) is _______ \(\times 10^{-1}\). (Nearest integer)JEE Mains 2024 Medium
- The decreasing order of reactivity of the following compounds towards nucleophilic substitution \(\left( S _{ N }{ }^{2}\right)\) is :
JEE Mains 2020 Medium - If 1 mM solution of ethylamine produces \(\mathrm{pH}=9\), then the ionization constant \(\left(\mathrm{K}_{\mathrm{b}}\right)\) of ethylamine is \(10^{-x}\). The value of \(x\) is ______ (nearest integer).
[The degree of ionization of ethylamine can be neglected with respect to unity.]JEE Mains 2025 Medium - In the given electrochemical cell, \(Ag(s)|AgCl(s)| FeCl_{2}(aq), FeCl_{3}(aq)|Pt(s)\) at 298 K, the cell potential \((E_{cell})\) will increase when :
(A) Concentration of \(Fe^{2+}\) is increased.
(B) Concentration of \(Fe^{3+}\) is decreased
(C) Concentration of \(Fe^{2+}\) is decreased
(D) Concentration of \(Fe ^{3+}\) is increased
(E) Concentration of \(Cl^{-}\) is increased
Choose the correct answer from the options given below :JEE Mains 2026 Medium - Amongst \(LiCl, RbCl, BeCl_2\) and \(MgCl_2\) the compounds with the greatest and the least ionic character, respectively are:JEE Mains 2014 Hard
More PYQs from JEE Mains
- The following data were obtained during the first order thermal decomposition of a gas \(A\) at constant volume: \(\mathrm{A}(\mathrm{g}) \rightarrow 2 \mathrm{B}(\mathrm{g})+\mathrm{C}(\mathrm{g})\)
The rate constant of the reaction is _______ \(\times 10^{-2} \mathrm{~s}^{-1}\). (nearest integer)S.No Time/s Total Pressure/(atm) \(1.\) \(0\) \(0.1\) \(2.\) \(115\) \(0.28\) JEE Mains 2024 Hard - Given below are two statements : Statement \(I\): In group \(13\), the stability of \(+1\) oxidation state increases down the group. Statement \(II\): The atomic size of gallium is greater than that of aluminium. In the light of the above statements, choose the most appropriate answer from the options given below:JEE Mains 2024 Medium
- If \(a_r\) is the coefficient of \(x^{10-r}\) in the Binomial expansion of \((1+x)^{10}\), then \(\sum \limits_{r=1}^{10} r^3\left(\frac{a_r}{a_{r-1}}\right)^2\) is equal toJEE Mains 2023 Hard
- Assume that protons and neutrons have equal masses. Mass of a nucleon is \(1.6 \times 10^{-27}\,kg\) and radius of nucleus is \(1.5 \times 10^{-15} A ^{1 / 3}\,m\). The approximate ratio of the nuclear density and water density is \(n \times 10^{13}\). The value of \(n\) is \(.................\)JEE Mains 2023 Medium
- A committee of \(11\) members is to be formed from \(8\) males and \(5\) females. If \(m\) is the number of ways the committee is formed with at least \(6\) males and \(n\) is the number of ways the committee is formed with at least \(3\) females, thenJEE Mains 2019 Hard
- For \(\mathrm{n} \geq 2\), let \(S_n\) denote the set of all subsets of \(\{1,2 \ldots . . ., n\}\) with no two consecutive numbers. For example \(\{1,3,5\} \in \mathrm{S}_6\), but \(\{1,2,4\} \notin \mathrm{S}_6\). Then \(n\left(\mathrm{~S}_5\right)\) is equal to ________JEE Mains 2025 Easy