General Principles and Processes of Isolation of Elements

Bihar Board Class 12 · Chemistry · 35 past questions

19 of 35 · show all

1. Q2 2026 Set A

   The main constituent of bones is

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2. Q7 2024 Set D

   Which of the following metals is generally found in free state ?

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3. Q8 2024 Set D

   Which of the following statements is true ?

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4. Q10 2024 Set D

   An ore having two different metal atoms is

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5. Q11 2023 Set F

   The important oxide ore of iron is

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6. Q12 2023 Set F

   Pyrolusite is an ore of which of the following ?

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7. Q18 2022 Set E

   The most abundant metal in earth crust is

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8. Q19 2021 Set A

   The formula of copper pyrite is

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9. Q21 2021 Set A

   The metal always found in free state is

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10. Q22 2021 Set A

    Which of the following has magnesium ?

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11. Q23 2021 Set A

    Galena is an ore of

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12. Q25 2019 Set D

    Chief ore of Iron is -

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13. Q28 2017

    Give the name and chemical composition of important ores of aluminium and Copper.

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14. Q29 2016

    Cinnabar is

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15. Q30 2016

    Element found from sea water is

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16. Q31 2015

    Main source of helium is

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17. Q33 2015

    Most abundant element in earth's crust is

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18. Q34 2015

    Malachite is an ore of

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19. Q35 2015

    Formula of copper pyrite is

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