A trumpeter gives more energy when she plays a note on her instrument by blowing harder into the mouthpiece. What is the effect on the note played?
It is louder than
before
The pitch gets higher
It is softer than before
The pitch gets lower

2b2t

explanation:

2b2t

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.