Teaching Haryana (HPSC) PGT Mock Test 2024 General Science Chemistry Basic Concepts of Chemistry

ଭାରୀ ଜଳ କେଉଁ ଭାବରେ ଉପସ୍ଥାପିତ ହୋଇଛି ?  

1
D2O2
2
D2O
3
H2O4
4
H2O2
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