Which of the following salts does not give a borax bead test?

What is microcosmic salt?

Which of the following gives the chromyl chloride test?

$A$ chemistry student trying to detect the metallic ion in a salt,makes a paste on a clean platinum wire loop of the salt with concentrated $HCl$. When he takes a small amount of this paste and keeps it in a non-luminous Bunsen flame,the colour of the flame changes to grassy green. He should,therefore,conclude that the metal is

In the flame test of a mixture of salts,a green flame with a blue centre was observed. Which one of the following cations may be present?

Identify the type of precipitate formed in the following reaction: $(NH_4)_2SO_4 + Ba(OH)_2 \longrightarrow BaSO_4 \downarrow + 2NH_3 \uparrow$