What is the chemical formula for calcium carbonate found in limestone and chalk?

Which element is essential for the structure of DNA and RNA molecules alongside carbon hydrogen oxygen and nitrogen?

What are the products of the electrolysis of brine sodium chloride solution?

Which gas is produced when an acid reacts with a metal?

What is the name of the process by which a liquid changes to a gas at its boiling point?

What is the role of a catalyst in a chemical reaction?

What is the chemical formula for methane, the main component of natural gas?

What is the chemical formula for nitric acid used in fertiliser and explosive manufacturing?

What does Avogadro's number represent?

Which synthetic polymer was the first to be produced commercially and is used to make electrical fittings?

Which noble gas is used in glowing advertising signs giving a reddish-orange colour?