Discussion
HMX contains
Answer: A
HMX is cyclotetramethylene tetranitramine, also called octogen, a powerful high explosive with four nitramine groups in an eight-membered ring. Ammonium nitrate is a different explosive and an oxidiser. Nitroglycerine is glyceryl trinitrate and cyclotrimethylene trinitramine is RDX, so the third and fourth options are other explosives. The answer is A. HMX was made from RDX as a by-product, has a higher melting point and is used in military explosives and in rocket propellants. Its name is said to stand for high melting explosive. The compounds in the other options are not HMX, and the cyclo-trimethylene compound in option D resembles RDX, which is a different explosive.
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