Excess of dilute sodium hydroxide solution is gradually added with shaking to an aqueous solution of zinc sulphate. What would you observe?

A light blue precipitate is first formed which finally dissolves to give a deep blue solution

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A white precipitate appears which dissolves to give a colorless solution

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A white precipitation is formed which does not dissolve

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No change takes place and the solution remains clear

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Solution

The correct option is B A white precipitate appears which dissolves to give a colorless solution
$Z n S O_{4} + 2 N a O H \to Z n (O H)_{2} White ppt. + N a_{2} S O_{4}$
$Z n (O H)_{2} + 2 N a O H \to N a_{2} Z n O_{2} soluble + 2 H_{2} O$

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Similar questions

What do you observe when

(a) dilute sulphuric acid is added to granulated zinc ?

(b) a few pieces of iron are dropped in a blute solution of sodium chloride ?

(d) ferrous sulphate solution is added to an aqueous solution of sodium hydroxide.

(e) solid lead nitrate is heated ?

(f) when dilute sulphuric acid is added to barium chloride solution ?

The products formed when an excess of sodium hydroxide solution is added to zinc sulphate solution are ___ and ___.

N a O H

A l C l_{3}

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