MCQ
The De-broglie $\lambda$ of electron in the $2^{st}$ Bohr orbit is
- A$4\pi r_1$
- ✓$\pi r_1$
- C$2\pi r_1$
- D$6\pi r_1$
✓
Answer
Correct option: B.
$\pi r_1$
b
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The following equilibrium exists in an aqueous solution of hydrogen sulphide : ${H_2}S $ $\rightleftharpoons$ $ {H^ + } + H{S^ - }$
→If dilute $HCl$ is added to an aqueous solution of ${H_2}S$ without any change in temperature
In which pair second ion is more stable than first?
Back bonding is involved in which of the organometallic compounds
The first transition element is
The most important oxidation state of copper is
The refluxing of ${(C{H_3})_2}NCOC{H_3}$with acid gives
→$ \mathrm{Ag}^{+}+\mathrm{NH}_3 \rightleftharpoons\left[\mathrm{Ag}\left(\mathrm{NH}_3\right)^{+}\right] ; \mathrm{k}_1=3.5 \times 10^{-3} $
→$ {\left[\mathrm{Ag}\left(\mathrm{NH}_3\right)\right]^{+}+\mathrm{NH}_3 \rightleftharpoons\left[\mathrm{Ag}\left(\mathrm{NH}_3\right)_2\right]^{+} ; \mathrm{k}_2=1.7 \times 10^{-3}}$
then the formation constant of $\left[\mathrm{Ag}\left(\mathrm{NH}_3\right)_2\right]^{+}$is
In order to prepare $1$ -chloropropane, which of the following reactants can be employed ?
→Consider the equilibrium ${N_2}_{(g)} + 3{H_2}_{(g)}$ $\rightleftharpoons$ $2N{H_3}_{(g)}$. $\Delta H = -93.6\, KJ$ The maximum yield of ammonia is obtained by
→The sugar present in milk is