Gino made a table to describe parts of the electromagnetic spectrum.

what mistake did gino make?

a. x-rays should have a low frequency and a long wavelength.
b. infrared light should have a high frequency, not a low frequency.
c. radio waves should have a very high frequency and a very short wavelength.
d. ultraviolet light should have a short wavelength, not a long wavelength.

1 a

2 d

3 a

4 c

explanation:

the answer is barium and copper bromide

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.