Explanation:

• Carbon tetrachloride is the IUPAC name of . It also has the IUPAC name Tetra- chloromethane. Carbon tetrachloride is used widely in the fire extinguishers and also as cleaning agent. It exists in liquid state and smells sweet and is has no flammability at low temperatures.  
• The IUPAC name of formaldehyde is Methanal. The chemical formula for methanal is . This is the simplest form of aldehyde. Methanal which natural organic compound.