16. The precursors of acid rain is (A) SO2 (B) NO2 (C) CO2 (D) All of these 17. India is very rich in following resources (A) iron minerals (B) aluminium (C) zinc (D) all of these 18. Most of the fertilizers contain (A) potassium (B) nitrogen (C) phosphorous (D) all of these 19. Biological pesticides include (A) bacteria (B) fungi (C) virus (D) all of these 20. Biomass is a source of energy (A) renewable (B) non-renewable (C) both (a) and (b) (D) none 21. Chernobyl Nuclear Power Station, destructed in 1986, was situated (A) Britain (B) Germany (C) Japan (D) Ukrain 22. Syngas is a mixture of. (A) CO and H2O (B) CO2 and H20 (C) CO and H20 (D) None
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