The graph below shows a reaction with a catalyst. How did the
addition of the catalyst change the graph?
Potential Energy
2
NGOCTOn Progress ISS
O
A. It lowered the height of part 1 and increased the height of
part 3.
O
O
B. It lowered the height of part 2.
c. It increased the height of part 1 and decreased the height
of part 3.
O
D. It increased the height of part 2.

The diagin dilutepage 6 of 12a6a5(a)fluorine, chlorine, bromine and iodine are placed in the same group of theperiodic table.state the common name used to describe elements in this group.(i)state the group in which the elements are placed and explain whythey are placed in that group.(ii)which of the above named elements is a solid at roomtemperature and pressure?