Which process converts vegetable oils into solid fats by adding hydrogen in the presence of a nickel catalyst?

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

Which type of reaction releases energy to the surroundings causing the temperature to rise?

Which element is the most abundant in the universe?

Which test is used to detect the presence of starch using iodine solution?

What is the name of the horizontal rows in the periodic table?

What is the process by which plants use carbon dioxide and water to make glucose using sunlight?

Which law states that matter can neither be created nor destroyed in a chemical reaction?

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

Which type of chemical formula shows the simplest whole number ratio of atoms in a compound?

Which element is liquid at room temperature and is the only non-metal element in this state?