Chemistry · 2013
JEE Main · 9 April 2013, Shift 1 · Q45
Sodium Carbonate cannot be used in place of ( NH_4)_2 CO_3 for the identification of Ca^2+, Ba^2+ and Sr^2+ ions (in group V) during mixture analysis…
Sodium Carbonate cannot be used in place of $\displaystyle \left(\mathrm{NH}_4\right)_2 \mathrm{CO}_3$ for the identification of $\displaystyle \mathrm{Ca}^{2+}, \mathrm{Ba}^{2+}$ and $\displaystyle \mathrm{Sr}^{2+}$ ions (in group V) during mixture analysis because :
Official answer
(1)
$\displaystyle \mathrm{Mg}^{2+}$ ions will also be precipitated
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JEE Main 2013 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.