Easy MCQ +4 / -1 PYQ · JEE Mains 2021

The addition of dilute NaOH to Cr3+ salt solution will give :

  1. A a solution of [Cr(OH)<sub>4</sub>]<sup>$-$</sup>
  2. B precipitate of Cr<sub>2</sub>O<sub>3</sub>(H<sub>2</sub>O)<sub>n</sub> Correct answer
  3. C precipitate of [Cr(OH)<sub>6</sub>]<sup>3$-$</sup>
  4. D precipitate of Cr(OH)<sub>3</sub>

Solution

$$C{r^{3 + }} + \mathop {NaOH}\limits_{dil.} \buildrel {} \over \longrightarrow \mathop {C{r_2}{O_3}.{{({H_2}O)}_n}}\limits_{precipitate} $$

About this question

Subject: Chemistry · Chapter: d and f Block Elements · Topic: Properties of Transition Metals

This question is part of PrepWiser's free JEE Main question bank. 155 more solved questions on d and f Block Elements are available — start with the harder ones if your accuracy is >70%.

More d and f Block Elements questions

Drill 25 more like these. Every day. Free.

PrepWiser turns these solved questions into a daily practice loop. Chapter-wise drills, full mocks, AI doubt chat. No auto-renew.

Start free →