NCERT Exemplar Class 11 Chemistry Chapter 2 MCQ

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Which of the following sets of quantum numbers represents the highest energy of an atom?

An = 3, l = 0, m = 0, s = + \(\frac {1}{2}\)

Bn = 3, l = 1, m = 1, s = + \(\frac {1}{2}\)

Cn = 3, l = 2, m = 1, s = + \(\frac {1}{2}\)

Dn = 4, l = 0, m = 0, s = + \(\frac {1}{2}\)

In the Bohrs model of the hydrogen atom, the ratio of the kinetic energy to the total energy of the electron in a quantum state n is:

C-1

D-2

Which of the following statements does not form a part of Bohrs model of hydrogen atom?

AEnergy of the electrons in the orbit is quantised

BThe electron in the orbit nearest the nucleus has the lowest energy

CElectrons revolve in different orbits around the nucleus

DThe position and velocity of the electrons in the orbit cannot be determined simultaneously

Which of the following statements in relation to the hydrogen atom is correct?

A3s orbital is lower in energy than 3p orbital

B3p orbital is lower in energy than 3d orbital

C3s and 3p orbitals are of lower energy than 3d orbital

D3s, 3p and 3d orbitals all have the same energy

A sub-shell with n = 6 , l = 2 can accommodate a maximum of

A12 electrons

B36 electrons

C10 electrons

D72 electrons

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