Q.21)-Fermentation is a process of docomposition of an organic compound by
- Catalysts
- Enzymes
- Carbanions
- Free radicals
Q.22)-Bone is used as a fertiliser because it contains the plant nutrient
- Nitrogen
- Phophorus
- Sodium
- Calcium
Q.23)-Bakeries use yeast in bread making because it
- Makes the bread hard
- Makes the bread soft and spongy
- Enhances the food values
- Keeps the bread fresh
Q.24)-Which of the following is biodegradable
- Leather Belts
- Silver Foil
- Iron Nails
- Plastic Mugs
Q.25)-The coating of solid waste with impervious material is known as
- Chemical fixation
- Landfill
- Capping
- Encapsulation
Q.26)-The rapidly growing mass of phytoplankton covering the surface water of a lake or pond is known as
- Water Pollution
- Water hyacinth
- Eutrophication
- Water bloom
Q.27)-The main pollution responsible for Bhopal Gas Tragedy is
- Methyl Isocynate
- Bromine
- Chlorofluorocarbon
- Chlorine
Q.28)-Asiatic lion is now
- Critically Endangered
- Endangered
- Extinct in Wild
- Vulnerable
Q.29)-In which ecosystem, grassland is included
- marine
- Freshwater
- Terrestrial
- Artificial
Q.30)-Which of the following agricultural practices have been primarily responsible for pollution of our water resources
- use of live-stock manure
- use of chemical fertilizers
- Excessive use of chemical presticides
- Deforestation