पाला और ओस दोनों बनने के लिए हवा में कौन सा पदार्थ होना चाहिए?
Which substance must be present in air for both frost and dew formation?
Explanation opens after your attempt
D. जलवाष्पWater vapour
Concept
Both form from water vapour although their final forms differ. Exam tip: treat moisture as the basic condition.
Why this answer is correct
The correct answer is D. जलवाष्प / Water vapour. Both form from water vapour although their final forms differ. Exam tip: treat moisture as the basic condition.
Exam Tip
दोनों जलवाष्प से बनते हैं भले ही उनका अंतिम रूप अलग हो। परीक्षा में नमी को मूल शर्त मानें।
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