Question

a) A white powder (A) gives colourless gas (B) which turns lime water milky, The white
powder (A) dissolves in dilute HCI to give gas (B). What is the a anion present in the
white powder?
b] An oxide of a metal which is very low in reactivity series, is heated in a test tube.
A colourless gas is liberated which makes a glowing splinter (like lighted incense stick)
burn brightly. Identify is the oxide and the gas liberated?​

Answer 1

Answer:

A. Carbonate(CO3 2-) or Sulphate(SO4 2-)

B. The oxide can be Mercuric Oxide and the gas evolved, obviously is O2