At constant temperature, when the volume of a gas is reduced to (1/3^rd), the pressure will increase _______.

Formation of water from hydrogen and oxygen is:

Which one of the following is not an electrolytic cell?

The oxidation number of chromium in K₂Cr₂O₇ is:

Which one of the following is not an electrolyte?

The most common example of corrosion is:

During the formation of water from hydrogen and oxygen, which of the following does not occur:

The formula of rust is:

In the redox reaction between Zn and HC1, the oxidizing agent is: