Which of the following precipitate dissolves in excess of sodium hydroxide solution?

Ferrous hydroxide

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Chromium hydroxide

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Aluminium sulphide

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none of the above

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Solution

The correct option is B Chromium hydroxide
Precipitate of $c h r o m i u m$ $h y d r o x i d e$ that is detected in 3rd group requires an excess of $N a O H$ . This is because only excess of $N a O H$ can fully dissolve the precipitate. of $c h r o m i u m$ $h y d r o x i d e .$

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Q. Which of the following ions in solution would form a white precipitate that is soluble in excess sodium hydroxide solution is added to it ?

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Which of the following precipitate dissolves in excess of sodium hydroxide solution?

The correct option is B Chromium hydroxidePrecipitate of chromium hydroxide that is detected in 3rd group requires an excess of NaOH. This is because only excess of NaOH can fully dissolve the precipitate. of chromium hydroxide.

The correct option is B Chromium hydroxide
Precipitate of $c h r o m i u m$ $h y d r o x i d e$ that is detected in 3rd group requires an excess of $N a O H$ . This is because only excess of $N a O H$ can fully dissolve the precipitate. of $c h r o m i u m$ $h y d r o x i d e .$