Which of the following carbonates decomposes readily at low temperatures ?
Na2CO3
K2CO3
Li2CO3
Rb2CO3
Bleaching powder is obtained by treating Cl2 with
Ca(OH)2
CaO
CaCO3
CaCl2
A.
Ca(OH)2
Bleaching powder is obtained by treating Cl2 with lime water.
Ca(OH)2 + Cl2 CaOCl2 + H2O
The solubility of carbonates decreases below the magnesium group due to decrease in:
Lattice energies of solids
inter-ionic attraction
hydration energies of cations
entropy of solution formation
Which of the following statements is false ?
CaOCl2 gives OH- Cl- and OCl- in aqueous solution
Diamond and graphite are allotropes of carbon
Bleaching action of Cl2 in moist condition is not permanent
Calomel is Hg2Cl2
Salt of thiosulphruic acid is sodium thiosulphate which is used in
Photography for fixing
Submarines
Space capsules
Petroleum refining
On dissolving moderate amount of sodium metal in liquid NH, at low temperature, which one the following does not occur?
Na+ ions are formed in the solution
Blue coloured solution is obtained
Liquid NH3 becomes good conductor of electricity.
Liquid ammonia remains diamagnetic