A student wants you to demonstrate that an electric current will produce a magnetic field. Which set of objects could be used to demonstrate this? A. A battery, a coil of wire, and some paper clips.

B. A compass, some paper clips, and a battery.

C. A battery, an iron nail, a long copper wire, and some paper clips.

D. An iron nail, a permanent magnet, and a battery.

lol idk man i guess u gotta ask bill nye the science guy

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.