WBJEE · Chemistry · Chemical Bonding and Molecular Structure
Bond order of \(\mathrm{He}_{2}, \mathrm{He}_{2}^{+}\) and \(\mathrm{He}_{2}^{2+}\) are respectively:
- A \(1, \frac{1}{2}, 0\)
- B \(0, \frac{1}{2}, 1\)
- C \(\frac{1}{2}, 1,0\)
- D \(1,0, \frac{1}{2}\)
Answer & Solution
Correct Answer
(B) \(0, \frac{1}{2}, 1\)
Step-by-step Solution
Detailed explanation
Hint: \(\mathrm{He}_{2}\left(4 \mathrm{e}^{-}\right)=\sigma(1 \mathrm{~s})^{2}, \sigma^{*}(1 \mathrm{~s})^{2} ; \mathrm{B} . \mathrm{O}=\frac{2-2}{2}=0\)…
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 correct order of acid strengths of benzoic acid \((X),\) peroxybenzoic acid \((Y)\) and \(p\)-nitrobenzoic acid \((Z)\) isWBJEE 2017 Medium
- Which of the following is correct?WBJEE 2012 Easy
- \([P] \stackrel{\text { Br }_{2}}{\longrightarrow} C_{2} \mathrm{H}_{4}\) Br \(_{2} \frac{\text { NaNH }_{2}}{\mathrm{NH}_{3}}\) ? \([Q]\)
\([Q] \frac{20 \% \mathrm{H}_{2} \mathrm{SO}_{4}}{\mathrm{Hg}^{2+} \cdot \Delta}[R] \stackrel{\mathrm{Zn}-\mathrm{Hg} / \mathrm{HC}}{\longrightarrow}[S]\)
The species \(P, Q, R\) and \(S\) respectively areWBJEE 2018 Medium - The molecule/molecules that has/have delocalised lone pair(s) of electrons is/are
WBJEE 2019 Medium - Which of the following contains maximum number of lone pairs on the central atom?WBJEE 2024 Medium
- Which of the following oxides is paramagnetic?WBJEE 2025 Medium
More PYQs from WBJEE
- A solution containing \(4 \mathrm{~g}\) of polymer in 4.0 litre solution at \(27^{\circ} \mathrm{C}\) shows an osmotic pressure of \(3.0 \times 10^{-4} \mathrm{~atm}\). The molar mass of the polymer in \(\mathrm{g} / \mathrm{mol}\) isWBJEE 2023 Hard
- Find the equivalent capacitance between \(A\) and \(B\) of the following arrangement :
WBJEE 2022 Easy - The general solution of the differential equation \(\log _{\mathrm{e}}\left(\frac{d y}{d x}\right)=x+y\) isWBJEE 2011 Easy
- Which one of the following is called a carbylamine?WBJEE 2009 Easy
- Consider the function \(y=\log _{a}\left(x+\sqrt{\left.x^{2}+1\right)}\right.\) \(a>0, a \neq 1 .\) The inverse of the functionWBJEE 2018 Medium
- Let \(P\left(a t^{2}, 2 a t\right), Q,\) R(ar \(^{2}, 2ar)\) be three points on a parabola \(y^{2}=4 a x\). If \(P Q\) is the focal chord and \(P K, Q R\) are parallel where the co-ordinates of \(K\) is \((2 a, 0)\) then the value of \(r\) isWBJEE 2018 Medium