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