Question

which is different in zn(oh)2,naoh,cu(oh)2,nh4oh

Answer 1

Answer:- $NH_4OH$

Explanations:- Looking at all the given hydroxides, all the first three are the hydroxides of metals(zinc, sodium and copper) but the last one does not have a metal. It has a polyatomic ion, ammonium.

So, the different one amounts the given compounds is $NH_4OH$ .

Answer 2

NH4OH is different than the others.

If you see the first three then they all are the hydroxides but they are reacting with a metal – zinc, sodium and copper – whereas, in the other situation, it is an ammonium hydroxide that is polyatomic in nature.

Hence, the main difference among them is the metal and poly atomic ion.