Question

From the list of the following salts choose the salt that most appropriately fits the description given in the following :
[ AgCl, MgCl₂, NaHSO₄, PbCO₃, ZnCO₃, KNO₃, Ca(NO₃)₂ ]

(i) A deliquescent salt
(ii) An insoluble chloride
(iii) On heating this salt gives a yellow residue when hot and white when cold
(iv) On heating this salt, a brown coloured to prepare the following salts:

Answer 1

(i) A deliquescent salt: MgCl₂
(ii) An insoluble chloride: AgCl
(iii) On heating, this salt gives a yellow residue when hot and a white residue when cold: ZnCO₃
(iv) On heating this salt, a brown-coloured gas is evolved: Ca(NO₃)₂