S Block Elements Question 199
Question: A sodium salt on treatment with $ MgCl_2 $ gives white precipitate only on heating. The anion of the sodium salt is
[IIT JEE Screening 2004]
Options:
A) $ HCO_3^{-} $
B) $ CO_3^{2-} $
C) $ NO_3^{-} $
D) $ SO_4^{2-} $
Show Answer
Answer:
Correct Answer: A
Solution:
$ MgCl_2+2NaHCO_3\to Mg{{(HCO_3)}_2}(aq)+2NaCl $
$ Mg{{(HCO_3)}_2}(aq)\xrightarrow{\Delta }\underset{\text{(White ppt}\text{.)}}{\mathop{MgCO_3}}\downarrow +H_2O+CO_2\uparrow $
BETA
