When concentrated HNO₃ is heated with P₂O₅, it forms

The mixture of conc.HCl and HNO₃ made 3:1 ratio contains 

Red lead is

The shape of SnCl₂ is 

Hydrogen will not reduce 

Of the following compounds, the most acidic is

For making good quality mirrors, plates of flint glass are used. These are obtained by floating molten glass over a liquid metal which does not solidify before glass. The metal used can be 

Nitrogen shows different oxidation states in the range

Which one of the following is an amphoteric oxide?

Which of the following is most stable ?