The addition of dilute |d and f Block Element |JEE-MAIN 2021

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JEE MAIN 2021

27.08.21_S2

Question

The addition of dilute NaOH to $\mathrm{Cr}^{3+}$ salt solution will give :

Select the correct option:

a solution of $\left[\mathrm{Cr}(\mathrm{OH})_4\right]^{-}$

precipitate of $\mathrm{Cr}_2 \mathrm{O}_3\left(\mathrm{H}_2 \mathrm{O}\right)_n$

precipitate of $\left[\mathrm{Cr}(\mathrm{OH})_6\right]^{3-}$

precipitate of $\mathrm{Cr}(\mathrm{OH})_3$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

$\mathrm{Cr}^{3+}+\underset{\text { dil. }}{\mathrm{NaOH}} \longrightarrow \underset{\text { preqpitate }}{\mathrm{Cr}_2 \mathrm{O}_3 \cdot\left(\mathrm{H}_2 \mathrm{O}\right)_n}$

Question Tags

JEE Main

Chemistry

Easy

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