Flame test is not given by

The alkaline earth metals forming ionic oxides are

How many of the following $\mathrm{s}$-block elements do not give characteristic colours in the flame test:

$\mathrm{Li}, \mathrm{Be}, \mathrm{Ca}, \mathrm{Ba}, \mathrm{Sr}, \mathrm{Mg}, \mathrm{Na}, \mathrm{K}, \mathrm{Cs}$

How many of the following compounds is/are amphoteric in character?

$\mathrm{CsOH}, \mathrm{LiOH}, \mathrm{Ca}(\mathrm{OH}{)}_2, \mathrm{Be}(\mathrm{OH}{)}_2, \mathrm{Mg}(\mathrm{OH}{)}_2, \mathrm{Ba}(\mathrm{OH}{)}_2, \mathrm{Sr}(\mathrm{OH}{)}_2, \mathrm{KOH}, \mathrm{NaOH}$