Among the hydrides of Group 16, water shows
unusual physical properties. Why ?

Raman and Rajan were studying the properties of solids. A solid 'X' showed same physical properties (thermal conductivity and refractive index) in all directions while another solid 'Y' showed differrent physical properties in different directions. Raman classified the solid 'X' as crystalline and solid 'Y' as amorphous. Rajan did not agree with Raman's classification. Answer the following questions Whom do you favour, Raman or Rajan and why?

Raman and Rajan were studying the properties of solids. A solid 'X' showed same physical properties (thermal conductivity and refractive index) in all directions while another solid 'Y' showed differrent physical properties in different directions. Raman classified the solid 'X' as crystalline and solid 'Y' as amorphous. Rajan did not agree with Raman's classification. Answer the following questions What is the natme of the property exhibited by solid 'X'?

Why Zr and Hf show similar chemical properties ?

Among the hydrides of group 15, predict the hydride having most basic character.

Among the hydrides of group 15, predict the hydride having strongest reducing agent.

Among the hydrides of group 15, predict the hydride having lowest boiling point .

Among the hydrides of group 15, predict the hydride having highest thermal stability.

Among the hydrides of group 15, predict the hydride having lowest boiling point .

Why do the elements present in a group show similar chemical properties?