If true enter 1, else enter 0.
$N a O H$ can be used to separate ${A l (O H)}_{3}$ and ${F e (O H)}_{3}$ .
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Solution

The correct option is A 1
The given statement is true.
${A l (O H)}_{3}$ and ${F e (O H)}_{3}$ . can be separated by using $N a O H$ .
${F e (O H)}_{3}$ is insoluble in aqueous NaOH solution. On the other hand ${A l (O H)}_{3}$ is soluble in $N a O H$ . It forms ${N a A l O}_{2}$ or $N a [{A l (O H)}_{4}]$ .
Aluminum hydroxde dissolves in excess of NaOH to form sodium meta aluminate.
$A l (O H)_{3} + N a O H \to N a [A l O_{2}] s o d i u m m e t a a l u m i n a t e + 2 H_{2} O$

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