वह कौन - सी गैस है जो स्वयं जलती है लेकिन जलाने में सहायक नहीं होती है तथा जो सड़े अण्डे जैसी गंध देती है ? - Which is the gas which burns by itself but does not help in burning and which gives smell like rotten eggs? - Wah Kaun - Si Gas Hai Jo Swayam jalti Hai Lekin jalane Me Sahayak Nahin Hoti Hai Tatha Jo sade Ande Jaisi gandh Deti Hai ? General Science in hindi, Chemistry Oxygen question answers in hindi pdf Carbon di Oxide questions in hindi, Know About Nitrogen General Science online test General Science notes in hindi quiz book Hydrogen sulphide
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