Explain why there is no existence of 2d orbital.

What are the significances of quantum number l and ml? Designate the two orbitals having n==1,l=0 and n=3,l=2. respectively. Explain- there is no existence of 2d orbital.

Explain why NO_2 dimerises.

Explain why the setting sun looks red?

Explain why the planets do not twinkle.

Explain why KO_2 is paramagnetic?

Explain why CH_4 is not square planer.

Explain why "The dissociation of PCl_5 decreasesin the presence of Cl_2 "?

Explain why rainbow is never seen on the surface of the moon.

Explain why the speed of a whirl wind in a tornado is alarmingly high.

What is Huckel rule? Explain why the following system are not aromatic.