Which of the following compounds are red in color ?

Many ionic compounds in transition metal ions are colored because of the electronic transitions (in the visible range) involving d electrons, whereas the ionic compounds of the representative elements are usually colorless. Which of the following compounds is green in color?

Which of the following compound gives red colour with iodine solution ?

Which of the following compound gives red colour with iodine solution ?

Which of the following compounds does not decolorize the red-brown color of a solution of bromine in carbon tetrachloride?