Environmental Issues

Bihar Board Class 12 · Biology · 33 past questions

31 of 33 · show all

1. Q1 2024 Set E

   Which of the following plants is referred to as 'Terror of Bengal'?

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2. Q2 2024 Set E

   Which of the following is not the reason for global warming?

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3. Q3 2023

   Which of the following is a heavy-metal water pollutants ?

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4. Q4 2023

   Eutrophication is found in –

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5. Q5 2023

   What causes acid rain ?

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6. Q6 2023

   Decolouration of lead and silver paints is caused due to –

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7. Q7 2023

   BOD level in fresh water should not exceed beyond –

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8. Q8 2022 Set A

   The pH of acid rain is below

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9. Q9 2022 Set A

   Photochemical smog contains

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10. Q10 2022 Set A

    Which of the following emits methane?

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11. Q11 2022 Set A

    Carbon monoxide is a major pollutant

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12. Q12 2022 Set A

    Which of the following exhibits biomagnification?

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13. Q13 2022 Set A

    Is the most adverse effect of radioactive pollutants a result of.

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14. Q14 2021 Set H

    Which of the following is not a greenhouse gas ?

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15. Q15 2021 Set H

    Indicator of SO$_2$ pollution is

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16. Q16 2020

    Excess of E. coli in water is an indicator of?

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17. Q17 2020

    Which of the following is considered the cause of biomagnification?

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18. Q18 2019

    Water holding capacity is one of the qualities of

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19. Q19 2019

    What is sewage? Describe any one method of its treatment in brief.

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20. Q20 2018

    Photochemical smog consists of…

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21. Q21 2018

    Snow blindness is human being is caused by…

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22. Q22 2018

    The thickness of ozone in a column of air from the ground to the top of atmosphere is measured in terms of…

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23. Q23 2018

    Which of the following is greenhouse gas?

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24. Q24 2018

    What do you mean by Ozone hole? What are main reasons for Ozone depletion?

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25. Q25 2017

    World Environment day is celebrated on-

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26. Q26 2017

    Population explosion results in-

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27. Q27 2017

    The safe noise level fixed by WHO is-

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28. Q30 2016

    Causes of acid rain are.

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29. Q31 2016

    Lichen is an indicator of

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30. Q32 2016

    Humans can generally tolerate sound intensity of

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31. Q33 2015

    Indicator of SO$_2$ pollution is

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