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MBD-IS MATTER AROUND US PURE-Example
- How will you get pure water from sea water ?
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- How is alum purified ?
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- What are the changes during chemical change ?
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- Name the type of change of combustion ?
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- How is matter classified on the basis of chemical composition ?
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- Which French scientist proved that element is a fundamental or basic ...
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- Which is the basic unit of matter ?
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- Define an element.
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- How are elements classified ?
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- Name the metal which is liquid at room temperature
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- What is metalloid ?
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- Give two examples of metalloids.
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- Give examples of non-metals.
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- Give examples for metals.
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- How many elements are known till today ?
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- How many elements occur in nature ?
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- How many elements are gases at room temperature ?
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- Name five methods to separate mixtures,
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- How are sugar crystals separated in a sugar factory ?
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- The size of colloidal particals is in the range........ .
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