Aqua regia is a mixture of
Dilute hydrochloric acid and concentrated nitric acid
Concentrated hydrochloric acid and dilute nitric acid
Concentrated hydrochloric acid [1 part] and concentrated nitric acid [3 parts]
Concentrated hydrochloric acid [3 parts] and concentrated nitric acid [1 part]
The yellow colour of HNO3 is due to dissolution of reddish brown coloured dioxide gas in the acid.
Carbon
Nitrogen
Hydrogen
Oxygen
_________ is very strong mono basic acid.
H2CO3
H2SO4
NH3
HNO3
The nitrogen present in the atmosphere react with the ________ to form nitric oxide.
Water
CO2
Nitric acid turns a paper soaked in potassium iodide solution brown due to liberation of
Iodine
Nitrogen dioxide
Copper oxide
Hydrogen iodide
Nitric acid is a strong agent of
oxidising
reducing
neutralising
None of these
Copper on reaction with dilute nitric acid produces the following oxide of nitrogen
Nitrous oxide
Nitric oxide
Which one becomes passive in concentrated nitric acid?
Iron
Copper
Silver
Lead
