Explain the limitations of VB theory.

How did Mendeleev arrange the elements? He left empty places in his periodic table. Why? Explain the limitations of Mendeleev classification

What are the limitation of VBT ?

Explain the Transpiration pull theory of ascent of sap. Add a note on its merits of demerits.

What are the limitations of Rutherford's model?

Explain the law of limiting factors with an example.

Explain the hybridization, geometry and magnetic property of [Co(NH_3)_6]^(3+) ion on the basis of Valance Bond Theory (VBT). [Atomic number of Co= 27].