Rrb je 27 may first shift review

1) अर्जुन- टैंक
2) नारायण कार्तिकेय
3) रावण सैटेलाइट लॉन्च
4) आर्टिकल 352= नेशनल एमरजैंसी
5)q=i/t
6)t=1/f
7)u=c/v
8)centrifugal force =mv2/r
9)sound wave in air =longitudenal = mechanical energy
10) plaster of paris=
11)noble prize 2019= chemistry
12)BCG=TB Ke liye
13)strongest bone =femur
14)theory of evaluation= darwin
15)vitamin c= gauva
16)v=12, q=2, work done?
17)electron affinity
18)modern periodic table based on = henary mosley
19)non metal oxide=acidic
Calender, clock, ranking