Which of the elements show passivity when treated with conc. HNO3?

Related Mcqs:

Compounds of nitrogen and phosphorus are mostly________________?

A. ionic B. covalent C. polar D. all varieties are possible...

SO3 is not absorbed in water directly because__________________?

A. Reaction is exothermic B. It is insoluble in water C. Dilute acid is produced D. All of above...

Which of the following will give phosphoric acid one reaction with water_________________?

A. PCI5 B. P2O3 C. P2O5 D. All of the above...

When sulphuric acid is treated with ethanol sulphuric acid behaves like________________?

A. an acid B. a dehydrating agent C. an oxidizing agent D. as sulphonating agent...

Which one of the followings possesses melting point below 0°C?

A. Nitrogen B. Phosphorus C. Carbon D. Bismuth...