CBSE
Multiple Choice QuestionsMatch the items given in Column I with those in Column II and select the correct option given below :
| Column I | Column II | ||
| a | Eutrophication | i | UV-B radiation |
| b | Sanitary landfill | ii | Deforestation |
| c | Snow blindness | iii | Nutrient enrichment |
| d | Jhum cultivation | iv | Waste disposal |
| a | b | c | d |
| ii | i | iii | iv |
| a | b | c | d |
| i | iii | iv | ii |
| a | b | c | d |
| i | ii | iv | iii |
| a | b | c | d |
| iii | iv | i | ii |
Which ecosystem has the maximum biomass?
Forest ecosystem
Grassland ecosystem
Pond ecosystem
Pond ecosystem
World Ozone Day is celebrated on
5th June
21st April
22nd April
16th September
Treatment of seed at low temperature under moist conditions to break its dormancy is called
scarification
vernalization
chelation
chelation
Which one of the following is not used for construction of ecological pyramids?
Dry weight
Number of individuals
Rate of energy flow
Rate of energy flow
What type of ecological pyramid would be obtained with the following data?
Secondary consumer : 120 g
Primary consumer : 60 g
Primary producer : 10 g
Inverted pyramid of biomass
Pyramid of energy
Upright pyramid of biomass
Upright pyramid of numbers
In stratosphere, which of the following elements acts as a catalyst in degradation of ozone and release of molecular oxygen?
Carbon
Cl
Oxygen
Fe
Presence of plants arranged into well defined vertical layers depending on their height can be seen best in :
Tropical Savannah
Tropical Rain Forest
Grassland
Grassland
Which of the following is a secondary pollutant?
CO
CO2
O3
SO2
Which one of the following is being tried in India as a biofuel substitute for fossil fuels
Jatropha
Azadirachta
Musa
Musa
