Question

(ii
) Eflorescent salts on exposure to the atmosphere change from
[amorphous to crystalline/crystalline to amorphous) state.
Temporary hardness in water is due to
(soluble/
insoluble) calcium & magnesium bicarbonates in water.
In double decomposition reactions between two compounds - base & acid-
to give salt & water, there is an interchange of
Lions/
radicals/molecules)​

Answer 1

ii is the write answer bro