Class 7 Science — Physical and Chemical Changes Important Questions with Answers (Long answers)
Class 7 Science is the first full year photosynthesis, acids-bases and electric current share one textbook. The rationalized NCERT dropped a few older chapters; what remains is the set CBSE still samples in periodic tests. This hub writes one unique paragraph and a question cluster per surviving chapter so “nutrition in plants class 7 important questions” and “heat class 7 MCQ” resolve to real practice, not an empty subject shell. Answers stay behind a tap. Hindi and English stems sit together because most school papers are bilingual.
Physical and Chemical Changes — भौतिक एवं रासायनिक परिवर्तन
A physical change can usually be reversed without a new substance; a chemical change makes something that was not on the table. Melting ice versus rusting iron is the textbook pair. Crystallisation is a physical route to a pure solid. Burning magnesium is chemical even if the ribbon looked “only brighter”. Class 7 does not yet demand balancing equations — it demands the right label and one reason. You are on Physical and Chemical Changes (Long answers), page 1 of 1 — 1 questions in this filter. Long answers model a five-mark write-up: definition, reason, one diagram or equation idea, and a closing line. Do not copy the whole block in the exam; steal the order. This view is for the night before a unit test. Phone layout: chapter chips scroll sideways, answers stay inside a tap, and the next page is a numbered link so Google and students both get a short URL. Updated for 2026 classroom practice on the rationalized NCERT.
Class 7 Science — Physical and Chemical Changes पर एक unit-test उत्तर लिखें (परिचय, 4 बिंदु, निष्कर्ष)।
View the correct answer
A physical change can usually be reversed without a new substance; a chemical change makes something that was not on the table. Melting ice versus rusting iron is the textbook pair. Crystallisation is a physical route to a pure solid. Burning magnesium is chemical even if the ribbon looked “only brighter”. Class 7 does not yet demand balancing equations — it demands the right label and one reason.
चार बिंदु: (1) NCERT परिभाषा/सूत्र/घटना। (2) एक उदाहरण या आरेख-विचार। (3) एक तुलना या कारण। (4) एक साधारण संख्यात्मक या उद्धरण यदि पाठ माँगता है।
निष्कर्ष: उत्तर अध्याय-सत्य रखें — बोर्ड की डेटशीट यहाँ नहीं गढ़ी गई।
People also ask — Class 7 Science
Class 7 Science में कितने प्रश्न हैं? 156 महत्वपूर्ण प्रश्न: 89 MCQ, 42 लघु, 25 दीर्घ। NCERT विज्ञान के rationalized अध्याय।
उत्तर कहाँ हैं? हर प्रश्न के नीचे View the correct answer दबाएँ। पहले स्वयं लिखें, फिर मिलाएँ। MCQ में सही विकल्प और एक पंक्ति की व्याख्या है।
पेज क्यों बँटे हैं? एक स्क्रीन पर 20 प्रश्न। बाकी Page 2, 3 पर — फोन पर स्क्रॉल छोटा रहता है। यह पेज 1/1 है।
Physical and Chemical Changes क्यों महत्वपूर्ण है? A physical change can usually be reversed without a new substance; a chemical change makes something that was not on the table. Melting ice versus rusting iron is the textbook pair. Crystallisation is a physical route to…
