Give example of a meso compound. Also comment on its optical activity giving reason. 

 Assign R/S configuration to the following compound:

Also give the steps involved.

) How will you distinguish maleic acid and fumaric acid?

(a) Assign the E or Z configuration to the following molecule giving the steps involved: 

Calculate the bond order of  molecule from its molecular orbital configuration.

Draw p_y-p_y combination of atomic orbitals to give the suitable molecular orbitals.

) 

Write the resonance structures of dimethylsulphone.

 Compare the characteristics of ionic and covalent compounds.

) What is electronegativity? Arrange the following in the decreasing order of their electronegativities: K, F and I.

State and illustrate Fajan’s rules giving suitable examples.

Give any two examples of atoms showing anomalous electronic configurations.

) Explain the stability of half-filled and completely filled orbitals giving suitable examples.

What are four quantum numbers? Give their significance.

 Explain the significance of and .

 List the applications of Schrodinger equation.

.Briefly discuss photoelectric effect. Also give the explanation of this effect given by Einstein.

Write the de-Broglie relationship for dual nature of matter. Also define matter waves.