Hydrogen chloride gas and ammonia can be used to demonstrate the fountain experiment because they are

In the conductance of aqueous CuSO\(_4\) solution, the current carriers are the

A type of isomerism that ClCH=CHCl can exhibit is 

The basicity of tetraoxophosphate(V) acid is

Which of the following is used in forming slag in the blast furnace for the extraction of iron?