Which of the following compounds is usually added to a swimming pool to prevent the growth
of algae ?
A. Caso
B. Cuso
C. PbSO
D. MgSO
4
4
4
4​

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?