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When metal 'M' is treated with NaOH , a ...

When metal 'M' is treated with NaOH , a white gelatinous precipitate 'X' is obtained , which is soluble in excess of NaOH . Compound 'X' when heated strongly gives an oxide which is used in chromatography as an adsorbent . The metal 'M' is -

A

Al

B

Fe

C

Zn

D

Ca

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