Alkanes MCQ HELP!

Hi,

Here's an MCQ from a past paper about ethane reaction with bromine:

Which molecule is not produced when ethane reacts with bromine in the
presence of ultraviolet light?

A C2H4Br2
B HBr
C H2
D C4H10


My understanding is that when bromine reacts with ethane:

C2H6 + Br2 --> C2H5Br + HBr

C2H5Br and HBr ARE formed so the cannot be A or B. Now I am stuck between answers C and D as from my understanding, both of those are not formed given the equation above.

Thanks

Hi,

Here's an MCQ from a past paper about ethane reaction with bromine:

Which molecule is not produced when ethane reacts with bromine in the
presence of ultraviolet light?

A C2H4Br2
B HBr
C H2
D C4H10


My understanding is that when bromine reacts with ethane:

C2H6 + Br2 --> C2H5Br + HBr

C2H5Br and HBr ARE formed so the cannot be A or B. Now I am stuck between answers C and D as from my understanding, both of those are not formed given the equation above.

Thanks

the answer is c because two c2h5 can terminate to create c4h10

What do you know about free radical substitution?
https://www.chemguide.co.uk/mechanisms/freerad/ch4andbr2.html

Have learnt about free radical sub. but i don't know how C4H10 would be produced