Question

A white solid L changes to yellow solid R when strongly heated but on cooling becomes white again. When L is reacted with dilute nitric(v) acid effervescence occurs.

1. Identify L
2. Write the equation for the reaction of L and nitric(v) acid.
3. Name and write the formula of the salt formed when solid R dissolved in sodium hydroxide solution.

Answer 1

1. ZnCO₃/Zinc Carbonate
2. ZnCO_3(s) +2HNO_3(aq) → Zn(NO₃)_2(aq) +CO_2(g) +H₂O_(l)
3. Sodium Zincate/ Na₂ZnO₂