Chemistry Question Bank

The value of a₀ (Bohr radius) in the expression for the radius of nth orbit of hydrogen atom (rₙ = n²a₀) is

When electrons of a hydrogen atom return to the L shell (n=2) from higher energy shells, the series of lines formed is called

Bohr's theory is NOT applicable to:

Which of the following statements does NOT form a part of Bohr's model of hydrogen atom?

A stream of electrons is passed between two charged plates at potential difference V (esu). If e and m are charge and mass of electron, the value of h/λ (λ = de Broglie wavelength) is

In any subshell, the maximum number of electrons having the same value of spin quantum number is

Assertion (A): Atoms are electrically neutral. Reason (R): Number of protons and electrons are different in an atom.

Assertion (A): The radius of the first orbit of hydrogen atom is 0.529 Å. Reason (R): Radius of each circular orbit rₙ = 0.529 × (n²/Z) Å, where n = 1,2,3 and Z = atomic number.

[MP PMT 2010] The relation between wave nature of light (photons) and stream of particles is given by de Broglie's equation:

Assertion (A): It is impossible to determine the exact position and exact momentum of an electron simultaneously. Reason (R): The path of an electron in an atom is clearly defined.

[Manipal 2008] Deflection of a few α-particles back on hitting a thin gold foil shows that

[AMU 2009] Probability of finding an electron at the nodal surface is

[Haryana PMT 2009] The number of nodal planes in the pₓ orbital is

[Manipal 2009] For f-orbital, the values of magnetic quantum number m are

[Haryana PMT 2010] The electronic configuration 1s², 2s², 2p¹ₓ 2p¹ᵧ 2p¹_z for nitrogen (not 1s², 2s², 2p²ₓ 2p¹ᵧ 2p⁰_z) is determined by

[RPMT 2010] Principal, azimuthal and magnetic quantum numbers are respectively related to

[VMMC 2010] Which of the following pairs is isoelectronic?

[CBSE AIPMT 2011] The total number of atomic orbitals in the fourth energy level of an atom is

[Manipal 2010] Which one of the following statements in relation to the hydrogen atom is correct?

[KCET 2012] The nitride ion in lithium nitride (Li₃N) is composed of

[AIPMT 2012] Maximum number of electrons in a subshell with l = 3 and n = 4 is

[NEET 2013] What is the maximum number of electrons that can be associated with the quantum numbers n=3, l=1 and m=−1?

[CBSE AIPMT 2015] The orbital angular momentum of an electron in a d orbital is equal to

[NEET 2016] How many electrons can fit in the orbital for which n = 3 and l = 1?

[NEET 2016] Two electrons occupying the same orbital are distinguished by