Environmental Issues

Bihar Board Class 12 · Biology · 33 past questions

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1. Q3 2023

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

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2. Q4 2023

   Eutrophication is found in –

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3. Q5 2023

   What causes acid rain ?

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4. Q6 2023

   Decolouration of lead and silver paints is caused due to –

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5. Q7 2023

   BOD level in fresh water should not exceed beyond –

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