railway RRB Technician Grade 3 Mock Test 2024 General Science Chemistry Equilibrium

અધાતુઓના ઓક્સાઇડ ________ સ્વભાવના હોય છે.

1
બેઝિક
2
બેઝિક અને એસીડીક બંને
3
ઉભયગુણી
4
એસીડીક
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