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

Which salt is used during the bead test in the qualitative analysis of inorganic substances?

What is microcosmic salt?

Identify the last step in wet chemical synthesis of nanomaterial.

When sodium chloride is heated with concentrated $H_2SO_4$ and solid potassium dichromate,which compound containing $Cr$ in the $+6$ oxidation state is formed as a gas?

$A$ 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