कौन सा बदलाव आसानी से उलटा नहीं किया जा सकता?
Which change cannot be easily reversed?
Explanation opens after your attempt
C. कागज का जलनाBurning paper
Concept
Burning paper forms new substances that cannot easily become paper again. Exam tip: irreversibility can indicate chemical change.
Why this answer is correct
The correct answer is C. कागज का जलना / Burning paper. Burning paper forms new substances that cannot easily become paper again. Exam tip: irreversibility can indicate chemical change.
Exam Tip
कागज जलने पर नए पदार्थ बनते हैं जिन्हें वापस कागज बनाना आसान नहीं। परीक्षा में अपरिवर्तनीयता रासायनिक संकेत हो सकती है।
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