railway RRB Technician Grade 3 Mock Test 2024 General Science Chemistry Chemical Bond and Molecular Structure

પાણીમાં હાઇડ્રોજન અને ઓક્સિજનના દળનું ગુણોત્તર શું છે?

1
1 : 8
2
1 : 4
3
2 : 5
4
2 : 3
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