Question

ver time, an iron nail reacts with water to produce iron oxide, or rust. Which of the following is a signal that rusting has taken place? A. the release of heat and steam at the area where the mixture occured B. the release of an odor and the presence of bubbles C. the appearance of sparks D. a color change on the nail from silver to reddish-brown

Answer 1

Over time, an iron nail reacts with water to produce iron oxide, or rust. Which of the following is a signal that rusting has taken place?

As rusting makes the color of the iron nail change to reddish-brown or answer is:
D. a color change on the nail from silver to reddish-brown

Hope I helped!

Answer 2

D. a change on the nail from silver to reddish-brown