Science and Nature Quiz for 6 December 2017
A new science quiz is available each week. Try our daily general knowledge quiz or work through our archive of daily and themed quizzes.
Question 1: What is or are the principal element(s), apart from carbon and hydrogen, in mustard gas?
A
B
Phosphorus and fluorine
Chlorine and fluorine
C
Sulphur and chlorine
D
Arsenic and chlorine