Q. _____ acid is used in the laboratory preparation of calcium carbonate.
Q. Egg shells and conch are natural sources of calcium carbonate.
Q. A is a gas which on dissolving in water forms an acid B. This acid on reaction with calcium hydroxide gives C and water. Identify A, B and C.
- A- Carbon dioxide, B- Carbonic acid, C- Calcium carbonate
- A- Carbon monoxide, B- Carbonic acid, C- Calcium oxide
- A- Oxygen, B- Sodium sulphate, C- Sodium carbonate
- A- Carbon dioxide, B- Carbonic acid, C- Calcium chloride
Q. The lime water turns milky when X gas is passed through it. This milkiness is caused due to the formation of Y. Identify X and Y from the options given below.
- X- CO, Y- CaCO3
- X- CO2, Y- Ca(OH)2
- X- CO2, Y- CaCO3
- X- O2, Y- Na2CO3
When a gas X is passed through limewater, it turns milky due to the formation of a precipitate Y. Identify X and Y.
- H2 and Ca(HCO3)2
- CO2 and CaCO3
- Cl2 and CaCl2
- CO2 and Ca(HCO3)2