railway RRB Technician Grade 3 Mock Test 2024 Chemistry Chemical Bonding and Molecular Structure

નીચેનામાંથી કયું તત્વ શૃંખલાબંધન ધરાવે છે?

1
કાર્બન
2
યુરેનિયમ
3
હાઇડ્રોજન
4
હિલિયમ
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