Exploring Substances: Acidic, Basic, and Neutral
CBSE · Class 7 · Science
Flashcards for Exploring Substances: Acidic, Basic, and Neutral — CBSE Class 7 Science. Quick Q&A cards covering key concepts, definitions, and formulas.
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What are acidic substances?
Answer
Acidic substances turn blue litmus paper red. They often taste sour.
अम्लीय पदार्थ क्या होते हैं?
Answer
अम्लीय पदार्थ नीले लिटमस पेपर को लाल कर देते हैं। वे अक्सर खट्टे होते हैं।…
What are basic substances?
Answer
Basic substances turn red litmus paper blue. They are generally slippery to touch and often taste bitter.
मूल पदार्थ क्या हैं?
Answer
मूल पदार्थ लाल लिटमस पेपर को नीला कर देते हैं। वे आम तौर पर छूने में फिसलन भरे होते हैं और अक्सर कड़वे होते हैं।…
What are neutral substances?
Answer
Neutral substances do not change the colour of either red litmus or blue litmus. They are neither acidic nor basic.
उदासीन पदार्थ क्या होते हैं?
Answer
उदासीन पदार्थ लाल लिटमस या नीले लिटमस का रंग नहीं बदलते हैं। वे न तो अम्लीय होते हैं और न ही क्षारीय।…
What is litmus?
Answer
Litmus is a natural substance obtained from lichens. It is used as an acid-base indicator and is available as blue and red paper strips or as a solution.
लिटमस क्या होता है?
Answer
लिटमस (Litmus) लाइकेन से प्राप्त एक प्राकृतिक पदार्थ है। यह अम्ल-क्षार सूचक के रूप में प्रयोग किया जाता है। यह नीले और लाल रंग के कागज की पट्टियों या घोल के रूप में उपलब्ध होता है।…
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
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