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 41-50 of 584 questions.
C. यौगिकCompound
चीनी एक compound है क्योंकि इसकी composition definite होती है। यह केवल physical mixture नहीं है। / Sugar is a compound because it has definite composition. It is not just a physical mixture.
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Iron is which type of pure substance?
D. तत्वElement
लोहा एक element है। इसमें iron atoms पाए जाते हैं। / Iron is an element. It contains iron atoms.
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Which of the following is energy and not matter?
A. ऊष्माHeat
ऊष्मा ऊर्जा का रूप है। इसका द्रव्यमान और आयतन पदार्थ की तरह नहीं माना जाता। / Heat is a form of energy. It is not considered to have mass and volume like matter.
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Which type of matter has fixed composition?
B. शुद्ध पदार्थPure substance
शुद्ध पदार्थ की composition निश्चित होती है। mixture की composition बदल सकती है। / A pure substance has fixed composition. Composition of a mixture can vary.
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How can components of a mixture generally be separated?
C. भौतिक विधियों सेBy physical methods
मिश्रण के components physical methods से अलग किए जा सकते हैं। जैसे filtration या distillation। / Components of mixtures can be separated by physical methods. Examples are filtration or distillation.
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What is generally needed to separate components of a compound?
D. रासायनिक विधिChemical method
यौगिक में elements chemical bonds से जुड़े होते हैं। इसलिए separation के लिए chemical method चाहिए। / In a compound elements are joined by chemical bonds. Therefore chemical method is needed for separation.
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What is the composition of pure water like?
A. निश्चितFixed
Pure water की composition fixed होती है। इसी कारण यह compound माना जाता है। / Pure water has fixed composition. Therefore it is considered a compound.
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In which type of matter can the proportion of components vary?
B. मिश्रणMixture
मिश्रण में components का ratio fixed होना जरूरी नहीं है। इसलिए हवा की composition स्थान के अनुसार बदल सकती है। / The ratio of components in a mixture need not be fixed. Therefore composition of air can vary with place.
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Which statement is correct for an element?
C. इसमें एक ही प्रकार के atoms होते हैंIt contains one type of atoms
तत्व में एक ही प्रकार के atoms पाए जाते हैं। यह simplest pure substance है। / An element contains one type of atoms. It is the simplest pure substance.
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Which is the best summary of Level 1 Nature of matter?
D. पदार्थ mass और space रखता है और state तथा composition से classify होता हैMatter has mass and space and is classified by state and composition
पदार्थ को physical और chemical basis पर classify किया जाता है। Definition और examples जरूर याद रखें। / Matter is classified on physical and chemical basis. Remember definition and examples.
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