List of top Chemistry Questions on Bohr’s Model for Hydrogen Atom

According to Bohr's model of hydrogen atom, which of the following statement is incorrect?
The wavelength of the light emitted by a hydrogen atom during a transition from \( n = 3 \) to \( n = 2 \) is \( 656.3 \, \text{nm} \). What is the energy of the photon emitted during this transition?
The de Broglie wavelength of an electron in the third Bohr orbit of H-atom is
The number of electrons with magnetic quantum number $m = 0$ in the elements with atomic numbers $Z = 24$ and $Z = 29$ are respectively
Identify the correct statements from the following:
I) Isotopes of an element show different chemical behaviour
II) Lyman series of lines of hydrogen spectrum appear in UV region
III) The oscillating electric and magnetic field components of electromagnetic radiation are perpendicular to each other and both are perpendicular to the direction of propagation of radiation
The de Broglie wavelengths of two fast-moving particles \( X \), \( Y \) are \( 1 \) nm, \( 3 \) nm respectively. Mass of \( X \) is nine times the mass of \( Y \). The ratio of kinetic energies of \( X \), \( Y \) is:
The de Broglie wavelength of an electron in the third Bohr orbit of H-atom is
The wavelength of the first line in the Balmer series of hydrogen spectrum is 656 nm. What is the wavelength of the second line?
If \(a_0\) is denoted as the Bohr radius of the hydrogen atom, then what is the de-Broglie wavelength \( \lambda \) of the electron present in the second orbit of the hydrogen atom?
Observe the following data.
IonQ4+Xb+Yc+Zd+
Radius (pm)536640100

Q4+, Xb+, Yc+, Zd+ are respectively

The de Broglie wavelengths of two fast-moving particles \( X \), \( Y \) are \( 1 \) nm, \( 3 \) nm respectively. Mass of \( X \) is nine times the mass of \( Y \). The ratio of kinetic energies of \( X \), \( Y \) is:
Which of the following statements are correct? (only correct)
I) The energy of hydrogen atom in its ground state is -13.6 eV.
II) On the basis of Bohr's model, the radius of the 3$^{rd}$ orbit of hydrogen atom is 158.7 pm.
III) The order of radius of the first orbit of H, He$^+$, Li$^{2+}$ and Be$^{3+}$ is H > He$^+$ > Li$^{2+}$ > Be$^{3+}$
Quantum number for outermost electron of K-atom are given by
The equilibrium constant for the dissociation of HI at 773 K is:

The angular momentum of an electron in a stationary state of \(Li^{2+}\) (\(Z=3\)) is \( \frac{3h}{\pi} \). The radius and energy of that stationary state are respectively.

The difference in radii between fourth and third Bohr orbits of \( He^+ \) (in m) is:
For hydrogen atom, energy of an electron in first excited state is $-3.4 \, \text{eV}$, K.E. of the same electron of hydrogen atom is $x \, \text{eV}$.Value of $x$ is ____ $\times 10^{-1} \, \text{eV}$. (Nearest integer)
According to Bohr's theory, when principal quantum number is 2, the radius of \( \text{Be}^{3+} \) will be:
The values of \( a \) and \( b \) in the solubility product equation for barium phosphate are:
When the excited electron of a $H$ atom from $n =5$ drops to the ground state, the maximum number of emission lines observed are________
Radius of the 2nd orbit of He+ is r0. Radius of the 4th orbit of Be3+ is xr0. Find x.

The energy of one mole of photons of radiation of frequency 2 \(\times\)1012 Hz in Jmol-1 is ________ (Nearest integer) 

[Given : \(h=6.626\times10^{-34}Js\)

 \(N_{A}=6.022\times10^{23}mol^{-1}\)]

The angular momentum of electron in H atom in a particular n state is $\frac{h}{\pi}$. What is the energy in J required to excite the electron from this particular n state to (n+1) state?
The energy of an electron in the first Bohr orbit of hydrogen atom is \(-2.18×10^{-18}J\). Its energy in the third Bohr orbit is ____.
Given below are two statements :
Statement I: Boron is extremely hard indicating its high lattice energy 
Statement II: Boron has highest melting and boiling point compared to its other group members. 
In the light of the above statements, choose the most appropriate answer from the options given below :