AIIMS Chemistry Structure Of Atom Class 11 Questions

Which has least covalent radius.

How many spectral line of Balmer series present in visible region :

If n = 2 for $\text{He}^+$ ion than find out the wave length

Which alkali metal during flame test will show colour corresponding to maximum wavelength?

Which one of the following set of quantum numbers is not possible for $4p$ electron?

Radius of $1^{\text{st}}$ orbit of $\text{H}$ and some orbit of $\text{Be}^{3+}$ is same. Energy of their orbit of $\text{Be}^{3+}$ is :

Assertion : The chemical properties of different isotope are same. Reason : Isotopes having same number of neutron.

Which of the following elements outermost orbit's last electron has magnetic quantum number $m=0$?

Assertion : In absorption spectrum, $n_f > n_i$, while in emission spectrum, $n_f > n_i$ Reason : Energy is limited in absorption spectrum, that is, electron moves from lower to higher orbit and energy is absorbed in emission spectrum, because election jumps from higher to lower orbit.

Assertion: Balmer series contains four important lines called Hₐ, Hᵦ, Hᵧ and Hₛ lines (wavelength 6563 Å, 4862 Å, 4341 Å, 4102 Å respectively). Reason: This is due to the jump from n₂ = 3,4,5,6 respectively to n₁ = 2.

A gas metal in bivalent state have approximately $23\text{e}^-$ what is spin magnetic moment in elemental state

What is maximum wavelength of line of Balmer series of Hydrogen spectrum $\left(R = 1.09 \times 10^7\text{ m}^{-1}\right)$ :

One mole of magnesium in the vapour state absorbed 1200kJmol⁻¹ energy. If the first and second ionisation energies of Mg are 750 and 1450kJmol⁻¹ respectively, the final composition of the mixture is

What is the energy ($\text{kJ/mol}$) associated with the de-excitation of an electron from $n = 6$ to $n = 2$ in $\text{He}^+$ ion?

The degeneracy of hydrogen atom that has energy equal to -\(\frac{R}{9}\) is (where R = Rydberg constant)

Which transition in the hydrogen atomic spectrum will have the same wavelength as the Balmer transition ( i.e. n=4 to n=2 ) of $\text{He}^{+}$ spectrum

According to Bohr’s theory, which of the following correctly represents the variation of energy and radius of an electron in nth orbit of H⁻atom?

Assertion: For hydrogen like species, energy of an electron in a particular orbit increases with increase in value of Z. Reason: Electronegativity decreases across a period.

One mole of magnesium in the vapour state absorbed 1200 kJ mol⁻¹ energy. If the first and second ionisation energies of Mg are 750 and 1450 kJ mol⁻¹ respectively, the final composition of the mixture is

The degeneracy of hydrogen atom that has energy equal to -Rₕ/9 (where Rₕ = Rydberg constant)

The stability of ferric ion is due to

If the IP of Na is 5.48 eV, the ionisation potential of K will be

Maximum number of unpaired electrons are present in

A particle is moving 3 times faster than the speed of electron. If the ratio of wavelength of particle and electron is 1.8 × 10⁻⁴, then particle is

Assertion: Number of radial and angular nodes for 3p-orbital are 1, respectively. Reason: Number of radial and angular nodes depends only on principal quantum number.

Threshold frequency of a metal is 5 × 10¹³ s⁻¹ upon which 1 × 10¹⁴ s⁻¹ frequency light is focused. Then the maximum kinetic energy of emitted electron is

In Bohr’s orbit, \( \frac{nh}{2\pi} \) indicates

Assertion : Bohr model fails in case of multi-electron species. Reason : It does not mention electron-electron interactions.

Assertion: The spectrum of $\text{He}^+$ is expected to be similar to that of hydrogen. Reason: $\text{He}^+$ is also one electron system.

Smallest wavelength occurs for

Which of the following is wrong for Bohr model?

In the ground state of Cu²⁺, the number of shells occupied, subshells occupied, filled orbitals and unpaired electrons respectively are

Assertion: The quantized energy of an electron is largely determined by its principal quantum number. Reason: The principal quantum number n is a measure of the most probable distance of finding the electron around the nucleus.

X⁻rays are emitted during

The de Broglie wavelength associated with a ball of mass 1 kg having kinetic energy 0.5 J is

α-Particles can be detected using

The most probable radius (in pm) for finding the electron in He⁺ is

For principle quantum number n = 4, the total number of orbitals having l = 3 is

The quantum number m of a free gaseous atom is associated with

Quantum numbers of an atom can be defined on the basis of

Which of the following has maximum energy?

Spectrum of Li²⁺ is similar to that of

Azimuthal quantum number defines

Which of the following does not have valence electron in 3d-subshell?

Assertion : For Balmer series of hydrogen spectrum, the value n₁ = 2 and n₂ = 3, 4, 5. Reason : The value of n for a line in Balmer series of hydrogen spectrum having the highest wave length is 4 and 6.

Assertion : Absorption spectrum consists of some bright lines separated by dark spaces. Reason : Emission spectrum consists of dark lines.

Which of the following arrangement is possible? n l m s

The electronic configuration 1s² 2s² 2p⁵ 3s¹ shows