Al_2O_3\, \, and \, \, Al(OH)_3 \, \, both\, \, are

  • Option 1)

    Acidic

  • Option 2)

    basic

  • Option 3)

    Amphoteric

  • Option 4)

    All of these

 

Answers (1)

As we learnt in 

Hydroxides of boron family -

General formula: M(OH)_{3}

Acidity decreases, basicity increases down the group

- wherein

Aluminium hydroxide is amphoteric

 

Oxides of boron family -

Acidity decreases and basicity increases down the group

General formula: M2O3

- wherein

Aluminium oxide is amphoteric

 

In the oxide and hydroxides of the Boron family, the acidity decreases and basicity increases down the group. Aluminium being right below Boron has amphoteric oxide and hydroxide. 

 


Option 1)

Acidic

This answer is incorrect

Option 2)

basic

This answer is incorrect

Option 3)

Amphoteric

This answer is correct

Option 4)

All of these

This answer is incorrect

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