Q. Animal dung is -------------- waste.
1) Biodegradable
2) Non-biodegradable
3) Hazardous
4) Toxic
Q. Which of the following is biodegradable?
1) Iron nails
2) Plastic mugs
3) Leather belts
4) Silver foil
Q. Which of the following is non-biodegradable?
1) Animal bones
2) Nylon
3) Tea leaves
4) Wool
Q. Name one waste which may pollute the earth to dangerous levels of toxicity, if not handled properly.
1) DDT
2) CFC
3) Radioactive substances
4) PAN
Q. In a lake polluted with pesticides, which one of the following will contain the maximum amount of pesticides?
1) Small fish
2) Microscopic animals
3) Big fish
4) Water birds
Q. Xenobiotics which are inherently resistant to microbial attack are called as -
1) Biodegradable
2) Persistent
3) Recalcitrant
4) All of the given options
Q. Which one of the following is the correct sequence of ecosystem in the order of decreasing productivity?
1) Mangroves, oceans, grassland, lakes
2) Oceans, lakes, grassland, mangroves
3) Mangroves, grasslands, lakes, oceans
4) Oceans, mangroves, lakes, grassland
Q. Which one of the following polymers is not biodegradable ?
1) Cellulose
2) Starch
3) Protein
4) PVC
Q. Sea weeds are the main and important source of the following element -
1) Iodine
2) Chlorine
3) Bromine
4) None of the above
Q. Which one of the following pairs is not correctly matched ?
1) Vitamin D - Rickets
2) Vitamin C - Bleeding gums
3) Vitamin A - Rheumatism
4) Vitamin B - Beriberi
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