Question

Which is the odd one out from with reason : (valency is not a criterion) 1. Al(OH)3 2. Pb(OH)2 3. Mg(OH)2 4. Zn(OH)2 ​

Answer 1

Your answer is (a).

OK dear nice day

Answer 2

Mg(OH)2 , is the odd one out among all the given compounds.

${\underline{\sf{Reason}}$

All other given compounds are amphoteric hydroxides except Mg(OH)2

${\underline{\sf{Amphoteric}}$

An amphoteric substance is an ion or molecule able to act as an acid and as well as a base. Amphoteric oxides are compounds of oxygen which exhibits both acidic as well as basic characteristics. These oxides when reacting with acid undergoes a neutralization reaction to form water and salt. This exhibits the basic property of the compounds. Similarly reacts with the alkali to form salt and water, exhibiting acidic property.