Practice focused topic-wise MCQs with answers and explanations for quick revision and exam preparation.
Difficulty select karke sirf is topic ke focused MCQs practice karein. Score, timer aur explanations student-friendly flow me milenge.
Showing 91-100 of 584 questions.
Steam changing into water is what type of change?
C. physical change
Steam से water बनने में only state change होता है। Chemical composition same रहती है। / Steam becoming water involves only state change. Chemical composition remains the same.
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Dissolving salt in water is generally considered what type of change?
D. भौतिक परिवर्तनPhysical change
नमक को evaporation से वापस पाया जा सकता है। इसलिए इसे सामान्यतः physical change माना जाता है। / Salt can be recovered by evaporation. Therefore it is generally considered a physical change.
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Burning of paper is what type of change?
A. रासायनिक परिवर्तनChemical change
कागज जलने पर नए पदार्थ बनते हैं। इसलिए यह chemical change है। / New substances form when paper burns. Therefore it is a chemical change.
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What generally does not change in a physical change?
B. chemical identity
Physical change में shape state या size बदल सकता है। पर chemical identity वही रहती है। / In physical change shape state or size may change. But chemical identity remains same.
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What can be an indication of a chemical change?
C. नया पदार्थ बननाFormation of new substance
Chemical change में new substances बन सकते हैं। जैसे जलना या जंग लगना। / In a chemical change new substances can form. Examples are burning and rusting.
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Rusting of iron is what type of change?
D. रासायनिक परिवर्तनChemical change
जंग लगने पर iron oxide जैसे नए substances बनते हैं। इसलिए यह chemical change है। / During rusting new substances such as iron oxide form. Therefore it is a chemical change.
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Melting of wax is what type of change?
A. भौतिक परिवर्तनPhysical change
मोम पिघलने पर केवल state बदलती है। इसलिए यह physical change है। / When wax melts only its state changes. Therefore it is a physical change.
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Burning of a candle is mainly what type of change?
B. रासायनिक परिवर्तनChemical change
Candle burning में wax reacts and new substances form. इसलिए यह chemical change है। / In candle burning wax reacts and new substances form. Therefore it is a chemical change.
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What is the main idea related to states of matter in Level 2?
C. कणों की दूरी गति और आकर्षण अवस्था तय करते हैंParticle distance motion and attraction decide state
States of matter को particle model से समझा जाता है। Distance attraction और motion key factors हैं। / States of matter are understood by particle model. Distance attraction and motion are key factors.
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What is the best summary of Level 2 Nature of matter?
A. ठोस द्रव गैस में कणों की arrangement motion और force अलग होते हैंIn solid liquid gas particle arrangement motion and force differ
ठोस द्रव और गैस की properties particle arrangement से explain होती हैं। State changes mostly physical changes हैं। / Properties of solid liquid and gas are explained by particle arrangement. State changes are mostly physical changes.
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