How much will i score if i wrote the reaction as follows 2KHCO3(s)___K2O(s)+H20(g)+2C02(g)
(He said water vapour so it is in the gas state)
And considering the test for iodine atom i said nitric acid and silver nitrate solution ,giving a yellow precipitate,i believe it is correct because water dissolves the halogenoalkane of course not as efficient as the ethanol but at least the ppt will appear and reaction will occur ... Need your opinions guys !!!