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Carbon and its Compounds Notes 1. The first fullerene was identified to contain 60 carbon atoms in the shape of a football. (C-60). Si... -
1-mark Questions/ Answers 1. What happens when magnesium ribbon burns in air? Ans. When magnesium ribbon burns in air, it combines with th...
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MOLE CONCEPT [CBSE Class IX Chemistry] While performing a reaction, to know the number. of atoms (or) molecules involved, the concept of...
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Q. 1. How much percentage of earth’s crust constitutes carbon element ? Ans. The earth’s crust has only 0·02% of carbon in the form o... -
Class 08 CHAPTER -4 MATERIALS : METALS AND NON METALS 1) Occurrence of metals and non metals :- Out of the 92 naturally...
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how can I download it ? Its good
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