Answer
The lewis structure for both the compounds are shown in the picture.
Work Step by Step
First picture:
1) Draw a P in between and then draw three Cl around it.
2) count the number of electrons around P, which in this question is 6. Since there has be an octet, draw a lone pair of electron on P.
3) draw all the electrons around Cl's as well.
Second picture:
1) Draw a P in between and then draw five Cl around it.
2) count the number of electrons around P, which in this question is 10. Since P is a third row element it can have more than 8 electrons around it.
3) draw all the electrons around Cl's as well.
