Chemistry - s Block Elements Question with Solution | TestHub

How many of the following metals can be detected in the laboratory through flame test
i)$\mathrm{B}\mathrm{e}$
ii)$\mathrm{M}\mathrm{g}$
iii)$\text{Na}$
iv)$\mathrm{K}$
v)$\mathrm{B}\mathrm{a}$