Question

why nacl become yellow when heated in exposure of NA metal??

Answer 1

HEY BUDDY HERE IS YOUR ANSWER

Nacl turns yellow when heated in presence of na. It is due to the non-stoichiometric effect of sodiun. This is called as metal excess defect of sodiunm.

HOPE THIS WILL HELP YOU-

M.ADITHYA(MSA)

Answer 2

When a sodium atom transfers an electron to a chlorine atom, forming a sodium cation Na+ and a chloride anion Cl- both ions have complete valence shells and are energetically more stable. The reaction is extremely exothermic, producing a bright yellow light and a great deal of heat energy.