Compounds of s and p block elements are almost white. What could be the absorbed radiation : uv or visible ?

What are f-block elements? Where are they placed in the periodic table?

How many groups are included in 'p-block elements ? Which are they ?

For s-block and p-block elements show that number of'valence electrons is equal to its group number.

When ZnO is heated it turns yellow and returns back to original white colour on cooling. What could be the reason?

The coefficient of static friction, mu_(s) between block A of mass 2 kg and the table as shown in the figure is 0.2. What would be the maximum mass value of block B so that the two blocks do not move? The string and the pulley are assumed to be smooth and massless. (g=10m//s^(2))

Electronic configuration of only one P block element is exceptional one molecuale of that element consists of how many atoms of it ?

In the following table, seven elements P,Q,R,S,T,U and V (here letters are not the usual symbol of the elements)of the modern periodic table with their atomic numbers are given If Q combines with U, what would be the formula of the compound formed? If Q and U are replaced by their respective metals what will be the formula of the compound formed.

Distinguish between: s-block elements and p-block elements