Correct Answer: D
Explanation:
Sol. RDX (Research Department Explosive) is an explosive solid and its chemical formula is C_3 H_6 N_6 O_6. Actually, RDX is a cyclotrimethylenetrinitramine. It is also known as Cyclonite, hexogen and T4. It is more powerful explosive than TNT. The velocity of this explosive is 8750 m/sec. Due to its high explosive property, it was widely used in second world war. RDX is a colourless solid substance. It is obtained by fuming nitric acid with hexamine.