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What happens when freshly precipitated F...

What happens when freshly precipitated `Fe(OH)_3` is shaken with small amount of `FeCl_3` solution ?

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A reddish brown coloured colloidal solution is obtained.
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ICSE-SAMPLE QUESTION PAPER 5 -Questions (Answer the following questions)
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  2. Why solids with F-centres are paramagnetic?

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