value of services rendered rs. 600000, date of issue of invoice is 3/3/19, advance received on 13/2/19 is rs. 150000 balance amount is received on 15/3/19. Ascertain time of supply​

The flame test is used to visually determine the identity of an unknown metal or metalloid ion based on the characteristic color the salt turns the flame of a bunsen burner. The heat of the flame converts the metal ions into atoms which become excited and emit visible light.