You put 1mL of C₆H₁₄ into a test tube with 1mL of KI (aq). Then you add a small amount of a metal salt, MNO₃(aq), and shake the mixture. (a) If the M⁺ reacts with, and oxidizes the I⁻ 
a) Iodine is liberated 
b) A precipitate forms 
c) No reaction occurs 
d) Gas evolution is observed