Which one of the following is not an explosive? A. Nitrochloroform B. TNG C. TNT D. Potassium Chlorate

The correct answer is D. Potassium Chlorate.

Nitrochloroform, TNG, and TNT are all explosives. Nitrochloroform is a colorless, flammable liquid that is used as a solvent and a propellant. TNG is a colorless, odorless, and tasteless liquid that is used as a chemical warfare agent. TNT is a yellow, crystalline solid that is used as a high explosive. Potassium Chlorate is a white, crystalline solid that is used as a fertilizer and a pyrotechnic.

Potassium Chlorate is not an explosive because it does not have the necessary properties to detonate. It is not flammable and does not react violently with other substances. It is also not sensitive to heat or shock.