Why does LiCl acquire pink colour when heated in Li vapours?

Why does star appears red in colour?

Why does velocity increase when water flowing in a broader pipe enters narrower pipe?

When does a body acquire a permanent set?

Why does nitric oxide become broen when released inn air?

Solution A gives pink colour when a drop of phenopthalein indicator is added to it. Solution B gives red colour when a drop of methyl orange is added to it. What type of solutions are A and B and which one of the solutions A and B will have a higher pH value?

Why does white ZnO(s) becomes yellow upon heating?

Why does a motor take more current when we start it?

Why does the colour of the sky appear blue?