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Which does not have a fixed chemical formula?किसका कोई निश्चित रासायनिक सूत्र नहीं होता?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: Airहवा
Air is a mixture so it does not have one fixed formula. Exam tip: be careful with formulas of mixtures.हवा मिश्रण है इसलिए उसका एक निश्चित सूत्र नहीं होता। परीक्षा में मिश्रणों के सूत्र पर सावधान रहें।
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