engineering recuitment BARC Stipendiary Trainee Category II 2023 Mock Test General Science Chemistry Basic Concepts of Chemistry

હાઇડ્રોજનનો કિરણોત્સર્ગી આઇસોટોપ કયો છે?

1
હિલીયમ
2
પેરા હાઇડ્રોજન
3
ડ્યુટેરિયમ
4
ટ્રીટિયમ
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