Teaching UP B.Ed (Paper 1 & 2) Mock Test 2025 Chemistry S - Block Group 1 Elements (Alkali Metals)

ক্ষারকত্বের সঠিক ক্রম বর্ণনা করা সেটটি হল:

1
K2O < Na2O < Al2O3 < MgO
2
MgO < Al2O3 < K2O < Na2O
3
Na2O < K2O < MgO < Al2O3
4
Al2O3 < MgO < Na2O < K2O
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