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CBSE 9th Science | Matter-Nature and Behaviour (Conceptual Questions with Very Short Answers)
Matter-Nature and Behaviour (Conceptual Questions with Very Short Answers) Question 1. How many elements are known at present? Answer. 115. Question 2. How many elements occur in nature? Answer. 92. Question 3. Give one example each of homogeneous and heterogeneous mixture. Answer. Homogeneous mixture – Iodized table salt. Heterogeneous mixture – milk. Question 4. Name…
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CBSE IX Science | Matter – Nature and Behaviour: NCERT Exercise – 2
Matter – Nature and Behaviour: NCERT Exercise – 2 Question 1. What is meant by a pure substance? Answer. A pure substance is a single substance or matter which can not be separated into other kind of matter by any physical process. All elements and compounds are pure substances. Question 2. Differentiate between homogeneous and…