Explain Pauli’s exclusion principle.

It is not possible to explain the Pauli's exclusion principal with the help of this atom.

STATEMENT-1: An orbital cannot have more then two electrons and they must have opposite spins. STATEMENT-2: No two electrojns in an atom can have same set of all the four quantum numbers as per Pauli's exclusion principle.

The orbital diagram in which both Pauli's exclusion principle and Hund's rule are violated , is :

Give the correct order of initials T(true)F(false) for following satements. (I) If electron has zero quantum magnetic numbers, then it must be present in s-orbital (II) In orbital diagram, Pauli's exclusion principal is violated (III) Bohr's model can explain spectrum of the hydrogen atom. (IV) A d-orbital can accommodate maximum 10 electrons only.

State and explain Gause's Competitive exclusion principle.

Explain competitive release and Gause's competitive exclusion principle.

Explain the construction , principle and working of a D.C. motor. Find the expression for its efficiency.