railway RRB Technician Grade 3 Mock Test 2024 General Knowledge Science Technology and Inventions

ହେନରୀ କାଭେଣ୍ଡିଶ 1766 ମସିହାରେ _____ ଆବିଷ୍କାର କରିଥିଲେ ।

1
ଅମ୍ଳଜାନ 
2
ହାଇଡ୍ରୋଜେନ
3
ହିଲିୟମ 
4
କ୍ଲୋରିନ୍
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