There are three ways to give an object a static charge. They are friction, conduction and induction. Two pieces of cellophane tape are stuck to a lab table. Each piece is quickly ripped off the table. What prediction would you make about what happens when the two pieces of tape are brought near one another?

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.

the answer is symmetrical : )

false it is never safe to stand on the top step of a ladder provided it is braced properly.