Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test Chemistry S - Block Group 1 Elements (Alkali Metals)
The set representing the correct increasing order of basic character is:
1
K2O < Na2O < Al2O3 < MgO
2
Al2O3 < MgO < Na2O < K2O
3
Na2O < K2O < MgO < Al2O3
4
More than one of the above
5
None of the above