1.

Which of the following statement(s) is/are with true ?

Answer»

Soluble bicarbonates give white precipitate with `MgCI_(2)` in cold
Soluble calcium bicarbonates give white precipitate with dilute amonia solution FOLLOWED by `MgSO_(4)`.
Bicarbonates are generlly soluble in water
`Hg(II)` chloride forms a reddish-brown precipitate in a solution of soluble carbonate.

Solution :a.`2HCO_(3)^(Theta) + Mg^(2+) overset("Cold") to Mg (HCO_(3))_(2) ("soluble") overset(Delta) to MgCO_(3) + CO_(2) + 2H_(2)O`
b.`Ca(HCO_(3))_(2) + 2NH_(3) rarr (NH_(4))_(2) CO_(3) + CaCO_(3) darr`
c. True STATEMENT
d. `CO_(3)^(2-) + 4Hg^(2+) + 3H_(2)O rarr Hg_(4)O_(3)CO_(3) darr` (reddish brown ) or `HgCO_(3),3HO + 6H^(o+)`


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