Environmental Issues

Bihar Board Class 12 · Biology · 33 past questions

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1. Q1 2024 Set E

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

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2. Q3 2023

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

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3. Q4 2023

   Eutrophication is found in –

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4. Q7 2023

   BOD level in fresh water should not exceed beyond –

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5. Q12 2022 Set A

   Which of the following exhibits biomagnification?

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6. Q16 2020

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

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7. Q17 2020

   Which of the following is considered the cause of biomagnification?

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8. Q19 2019

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

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