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  • Give answer! 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

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 :

  • Option 1)

    Fe
     

  • Option 2)

    Zn
     

  • Option 3)

     Ca
     

  • Option 4)

     Al

 

Answers (1)

best_answer

As we learned

Reaction of aluminium with alkalies -

Reacts with aqueous alkali and liberates H2

- wherein

2Al+2NaOH+6H_{2}O\rightarrow 2Na^{+}\left [ Al\left ( OH_{4} \right ) \right ]^{-}+3H_{2}

 

 

(Amphoteric metals are excess so lub le in alkali)            galatinous white

                                                                                             

 

   


Option 1)

Fe
 

Option 2)

Zn
 

Option 3)

 Ca
 

Option 4)

 Al

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Aadil

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