railway RRB Technician Grade 3 Mock Test 2024 General Science Chemistry Chemical Reaction

जिंक + सल्फ़्यूरिक अम्ल → जिंक सल्फेट + ______

1
क्लोरीन
2
हाइड्रोजन
3
नाइट्रोजन
4
कार्बन
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