General Principles and Processes of Isolation of Elements

Bihar Board Class 12 · Chemistry · 35 past questions

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1. Q31 2015

   Main source of helium is

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2. Q33 2015

   Most abundant element in earth's crust is

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3. Q34 2015

   Malachite is an ore of

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4. Q35 2015

   Formula of copper pyrite is

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