Four different salts each imparted a yellow color to a flame indicating the presence of sodium, Na+. They reacted with coldH2SO4 as follows. Identify each SALT.
a) Effervescence was observed, and the evolved gas was colorless and odorless and did not fume in the moist air.
b) Effervescence was observed, and the evolved gas was pale reddish-brown, and had a sharp odor, and fumed strongly in moist air.
c) Effervescence was observed, and the evolved gas was colorless, had a sharp odor, and fumed in moist color.
d) Effervescence was observed, and the evolved gas formed violet fumes and had a rotten egg odor