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GPSC Class 1 - 2 2019 Paper 2
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Question 78
EASY
Correct: +1
Incorrect: -1
વાતાવરણના કુલ વાયુ રચનામાં નીચેના પૈકી કયો વાયુ એ સૌથી ઓછા પ્રતિશત ધરાવે છે?
a
હિલીયમ
b
હાઈડ્રોજન
c
ઓઝોન
d
નિયોન
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