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CBSE 9th Science | Matter-Nature and its Behaviour (Long Answer Type Questions)
Matter-Nature and its Behaviour (Long Answer Type Questions) Question 1. Classify the following as physical change or chemical change. (i) Burning of magnesium ribbon in air (ii) Burning of sulphur in air (iii) Electrolysis of water (iv) Purification of copper sulphate from impure copper sulphate by crystallization, (v) Preparation of sugar solution (vi) Conversion of…
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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…