शुद्ध पदार्थ की सही पहचान क्या है?
What is the correct identification of a pure substance?
Explanation opens after your attempt
A. जिसकी संरचना निश्चित होIt has fixed composition
Concept
A pure substance has fixed composition. Exam tip: treat fixed composition as the key phrase.
Why this answer is correct
The correct answer is A. जिसकी संरचना निश्चित हो / It has fixed composition. A pure substance has fixed composition. Exam tip: treat fixed composition as the key phrase.
Exam Tip
शुद्ध पदार्थ की संरचना निश्चित होती है। परीक्षा में निश्चित संरचना को मुख्य शब्द मानें।
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