In the wet tests for detection |MotionStraighLineJEEMAIN2023

JEE MAIN 2023

13-4-23 S2

Question

In the wet tests for detection of various cations by precipitation, Ba2+ cations are detected by obtaining precipitate of

Select the correct option:

Ba(ox): Barium oxalate

$\mathrm{BaCO}_3$

$\mathrm{Ba}(\mathrm{OAc})_2$

$\mathrm{BaSO}_4$

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Solution

Sol. In wet testing, $\left(\mathrm{NH}_4\right)_2 \mathrm{CO}_3$ is used as group reagent for $5^{\text {th }}$ group cations $\left(\mathrm{Ba}^{2+}, \mathrm{Ca}^{2+}, \mathrm{Sr}^{2+}\right)$ $$ \mathrm{Ba}^{+2}+\left(\mathrm{NH}_4\right)_2 \mathrm{CO}_3 \rightarrow \underset{\text { (white precipitate) }}{\mathrm{BaCO}_3 \downarrow}+\mathrm{NH}_4^{\ominus} $$

Question Tags

JEE Main

Chemistry

Easy

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