COMEDK · Chemistry · 2. Structure of Atom
Bohr's radius of 2 nd orbit of \(\mathrm{Be}^{3+}\) is equal to that of
- A 1st orbit of hydrogen
- B 4th orbit of hydrogen
- C \(3 \mathrm{rd}\) obit of \(\mathrm{Li}^{2+}\)
- D 2nd orbit of \(\mathrm{He}^{+}\)
Answer & Solution
Correct Answer
(A) 1st orbit of hydrogen
Step-by-step Solution
Detailed explanation
Correct option is A.
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 grams of potassium dichromate are required to oxidise 20.0 g of \(\mathrm{Fe}^{2+}\) in \(\mathrm{FeSO}_4\) to \(\mathrm{Fe}^{3+}\) if the reaction carried out in an acidic medium? Molar mass of \(\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7\) and \(\mathrm{FeSO}_4\) are 294 and 152 respectively.COMEDK 2024 Easy
- Identify the product \([\mathrm{C}]\) formed at the end of the reaction below
1,1,2,2- Tetrabromopropane + 2 \(\mathrm{Zn}_{(\mathrm{S})}\) / Ethanol \(\rightarrow\) [B]
\([\mathrm{B}]\) + 2 moles of \(\mathrm{HBr} \rightarrow[\mathrm{C}]\)COMEDK 2024 Medium - Energy is stored in our body in the form ofCOMEDK 2013 Easy
- Liquor ammonia bottles are opened only after cooling. This is becauseCOMEDK 2018 Easy
- Identify the incorrect statement/s.
A. The maximum number of electrons that can be accommodated in an atom, in which the largest Principal quantum number value is 4 , is 54 . B. According to Rydberg, all series of lines in Hydrogen spectrum can be described by the equation:
\(\frac{1}{\lambda}=109677\left(\frac{1}{n_1^2}-\frac{1}{n_2^2}\right) \mathrm{cm}^{-1}\) where \(\left(n_1COMEDK 2025 Medium Explore more questions on appThe time needed for completion of \(80 \%\) is \(y\) times the half-life period of a first order reaction. What is the value of \(y\) ?COMEDK 2025 MediumFrom COMEDK More PYQs from COMEDK
- In a single slit Fraunhofer diffraction pattern obtained at normal incidence, at the angular position of the first diffraction minimum the phase difference (in radian) between the waves from the opposite edges of the slit isCOMEDK 2025 Medium
- If \((p \wedge \sim r) \rightarrow(\sim p \vee q)\) is false, then the truth values of \(p, q\) and \(r\) are respectivelyCOMEDK 2016 Easy
- If the area of region bounded by the lines \(y=2 x+1, x\)-axis, \(x=a\) and \(x=3\) is 10 sq units. Then the value of ' \(a\) ' isCOMEDK 2025 Medium
- Which one of the following is an example of step growth polymerisation?COMEDK 2023 Easy
- In an adiabatic process,COMEDK 2016 Easy
- Chords of the circle \(x^{2}+y^{2}=r^{2}\) touch the hyperbola \(\frac{x^{2}}{a^{2}}-\frac{y^{2}}{b^{2}}=1\). The locus of the mid-points of the chords isCOMEDK 2017 Hard