Bleaching powder slowly loses its activity when it stands in air. This is due to
Reaction with CO2 to evolve chlorine
A solid compound ‘X’ on heating gives CO2 gas and a residue. The residue mixed with water forms ‘Y’. On passing an excess of CO2 through ‘Y’ in water, a clear solution ‘Z’ is obtained. On boiling ‘Z’, compound ‘X’ is reformed. The compound ‘X’ is
The carbonate that will not decompose on heating is
The correct order of increasing thermal stability of K2CO3, MgCO3, CaCO3 and BeCO3 is:
In which of the following the hydration energy is higher than the lattice energy?
The solubility of alkali metal hydroxide follows the order:
The label on a bottle of H2O2 solution reads as ’10 volume’. The concentration of H2O2 in percentage by volume is
Which of the following has the highest decomposition temperature?
Chloride of an element gives natural solution in water. In the periodic table the element belongs to
Among the following compounds of cement which is present in the highest amount?
Sodium peroxide which is a yellow solid, when exposed to air becomes white due to the formation of