Multiple choice Which of the following explosives is used to trigger other explosives ? Nitrogen triiodide Nitrogen trichloride Mercury(II) fulminate Lead picrate Reveal answer Fill a bubble to check yourself C Correct answer Explanation Mercury(II) fulminate, Hg(CNO)2, is a primary explosive. It is highly sensitive to friction and shock. It is mainly used as a trigger for other explosives in percussion caps and blasting caps.