For iron to rust, there should be present?

An element X has 127 neutrons and 82 electrons. Its atomic number is?

When glowing splint is inserted into the mouth of a jar containing a gas, the splint is extinguished. The gas gives a white precipitate when passing into bar...

An example of a strong electrolyte is?

Methane is member of the homologous series called?

The mass number of an atom is?

The oxidation number of manganese in KMnO4 is?

When a bottle of Coca-Cola is opened, bubbles of evolve. The gas is?

Sodium and potassium belong to the same group of the Periodic Table. This is because?