किसका कोई निश्चित रासायनिक सूत्र नहीं होता?
Which does not have a fixed chemical formula?
Explanation opens after your attempt
C. हवाAir
Concept
Air is a mixture so it does not have one fixed formula. Exam tip: be careful with formulas of mixtures.
Why this answer is correct
The correct answer is C. हवा / Air. Air is a mixture so it does not have one fixed formula. Exam tip: be careful with formulas of mixtures.
Exam Tip
हवा मिश्रण है इसलिए उसका एक निश्चित सूत्र नहीं होता। परीक्षा में मिश्रणों के सूत्र पर सावधान रहें।
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