If one of the following oxides is heated with hydrogen or carbon using a Bunsen burner, it is not reduced to the metal. Which one is it?

ln two separate experiments O.36g and O.71g of chlorine combined with a metal X to give Y and Z. An analysis showed that Y and Z contain 0.20g and 0.40g of X respectively. The data above represents the law of

Oxygen is a mixture of two isotopes O and O with the relative abundances of 90% and 10% respectively. The relative atomic mass of oxygen is

Which of the following is an electrolyte?