first grow attempt ever

This is my first grow attempt ever with two t5 bright lights, 1/4 nutrients, 5.8pH level, 10 day old plants. I was wondering if anyone knows what is either wrong with number 5 or what strain number 5 is (i dont know what any of my plants are I got free seeds from a friends). Thanks

PLANT 1


PLANT 2


PLANT 3


PLANT 4



PLANT 5


PLANT 6