i. Metals are present in all the four blocks of the periodic table.
ii. Salts of metals in the f-block and p-block (except AlCl3) are not common laboratory chemicals. Therefore, the choice is between sand d-block.
iii. From the given properties their placement is done as shown below:
- s-block: Metal that reacts vigorously with water.
- d-block: Metal that reacts slowly with water.
iv. The colourless nature of the less reactive metal in the d-block implies that the inner d subshell is completely filled.