When sodium or potassium is dropped in water, we can observe a golden yellow or a lilac coloured flame respectively whereas when calcium is dropped , no flame is observed . Why is there a difference in observation in the above two cases?

When sodium or potassium is dropped in water, we can observe a golden

1.	When sodium or potassium is dropped in water, we can observe a golden yellow or a lilac coloured flame respectively whereas when calcium is dropped , no flame is observed . Why is there a difference in observation in the above two cases?
Answer» Solution :(i) Comparision of Na , K , Ca with that of WATER. (II) Comparision of physical properties of Na , K and Ca. (III) Type of REACTION that takes place when these metals react with water . (IV) Condition required for burning.