Teaching Bihar STET Paper 1 (माध्यमिक) Mock Test 2024 Chemistry Some Basic Concepts of Chemistry

उस यौगिक की पहचान कीजिए, जो NaOH के साथ अभिक्रिया नहीं करता है। 

1
BeO
2
SiO2
3
B2O3
4
CaO
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