Question

Refer to the following data at standard conditions.

	Appearance	Reactions with dilute $HCl$	Reaction with dilute $HN{O}_3$
Unknown metal - 1	Dull gray solid with white oxide coating	Dissolved with bubbles of clear gas	Dissolved with bubbles of clear gas
Unknown metal - 2	Solid; lustrous, smooth silver-gray surface	No reaction	Dissolved with bubbles of orange gas

Unknown metal -2 could be ?

• A. carbon
• B. copper
• C. zinc
• D. sodium
• E. silver

Answer 1

The correct option is E silver

$\text{For metal-2 (M2) , given that:}$

$\text{- Appearance}\to \text{solid, lustrous, smooth silver - gray surface.}$

$M_2\text{in dil.HCl}\to \text{No reaction}$

$M_2\text{in dil.HNO}{}_3\to \text{Dissolved with bubbles of orange gas.}$

$\text{We know, Silver (Ag) does not react with HCl as it is very}$ $\text{inert or passive metal, but dissolves in dil. HNO}{}_3\text{to}$

$\text{give orange fumes of nitric acid.}$

$\text{Hence,}{M}_2\text{is}\text{silver}\left(Ag\right).$