Aluminium is passive to concentrated nitric acid. Why?

When tin is treated with concentrated nitric acid

Aluminium becomes passive in :

Aluminium becomes passive in :

Identify the gas evolved in the following reaction when : Sulphur is treated with concentrated nitric acid.

Hydrogen chloride gas is prepared in the laboratory using concentrated sulphuric acid and sodium chloride. Answer the question that follow based on this reaction : Why is concentrated sulphuric acid used instead of concentrated nitric acid ?

In Lassaigne's test for the detection of halogen , the sodium fusion extract is first boiled with concentrated nitric acid . This is

Write balanced equation for the following : Phosphorus is treated with concentrated nitric acid.

Name the gas that is produced in the following case: Sulphur is oxidized by concentrated nitric acid.

An acid obtained when concentrated nitric acid is heated with sulphur is _______ [sulphurous acid/sulphuric acid/nitrous acid]

Name the gas that is produced , I } When sulphur is oxidozed by concentrated nitric acid .ii] During action of cold & dilute nitric acid on copper.