(A) Explain Bragg’s spectrometer method.(B) Write about the preparation of colloids by chemical methods.

(A) Explain Bragg’s spectrometer method.(B) Write about the preparation of colloids by chemical methods.

What are the advantages and disadvantages of emulsion polymerization as compared to bulk and solution polymerization?

Explain:(i)Transition elements mostly form the complex compounds. Why?(ii)Transition elements are a good catalyst. Why?(iii)Transition elements show variable valency. Why?

(a) Give the postulates of valence bond theory of coordination compounds.(b) Differentiate chemical reactions from nuclear reactions.