railway RRB Technician Grade 3 Mock Test 2024 General Science Chemistry Structure of Atom

पाण्याच्या एका रेणूमध्ये ऑक्सिजनचे _ अणू आणि हायड्रोजनचे ___ अणू असतात.

1

1, 1

2

2, 1

3

3, 1

4

1, 2

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