MCQ
The value of the energy for the first excited state of hydrogen atom will be ............. $\mathrm{eV}$
- A$ - 13.6$
- ✓$ - 3.40$
- C$ - 1.51$
- D$ - 0.85$
✓
Answer
Correct option: B.
$ - 3.40$
b
(b) $E = \frac{{ - 13.6}}{{{n^2}}}eV = \frac{{ - 13.6}}{{{2^2}}} = \frac{{ - 13.6}}{4} = - 3.40\,\,eV$
(b) $E = \frac{{ - 13.6}}{{{n^2}}}eV = \frac{{ - 13.6}}{{{2^2}}} = \frac{{ - 13.6}}{4} = - 3.40\,\,eV$
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
Reaction of $HBr$ with propene in the presence of peroxide gives
→The ozone layer in earth's atmosphere is crucial for human survival because it :
The solution of $N{a_2}C{O_3}$ has $pH$
→When $4d$ orbital is complete, the newly entering electrons goes in to
→The incorrect statement regarding the geometrical isomers of $2$-butene is:
→A weak acid, $HA$ is found to be $10\%$ ionized in $0.01\, M$ aqueous solution. Calculate the $pH$ of a solution which is $0.1\, M$ in $HA$ and $0.05\, M$ in $NaA.$
→Let the solubility of an aqueous solution of $Mg{(OH)_2}$ be $x$ then its ${k_{sp}}$ is
→Which of the following compounds are antiaromatic
The total number of lone pairs of electrons on oxygen atoms of ozone is $...........$.
→Choose the reaction($s$) from the following options, for which the standard enthalpy of reaction is equal to the standard enthalpy of formation.
→$(1)$ $\frac{3}{2} O _2( g ) \rightarrow O _3$ $(g)$
$(2)$ $\frac{1}{8} S _8( s )+ O _2( g ) \rightarrow SO _2( g )$
$(3)$ $2 H _2( g )+ O _2( g ) \rightarrow 2 H _2 O (l)$
$(4)$ $2 C ( g )+3 H _2( g ) \rightarrow C _2 H _6( g )$