Tajmahal is threatened due to the presence of:

Related Mcqs:

1. The light of cities is reduced in comparison to villages due to the presence of:

   A. SO2 and SO3
   B. SO2 and oxides of nitrogen
   C. Hydrocarbons and N2O
   D. Suspended particulate matter

2. Green-house effect is due to the presence of:

   A. Ozone layer in the atmosphere
   B. Infra-red radiations
   C. Moisture in the atmosphere
   D. CO2 in the atmosphere

3. The air pollution caused by phosphate fertilizer factories is due to:The air pollution caused by phosphate fertilizer factories is due to:

   A. Phosphene
   B. SiF4
   C. Dust
   D. Halogens

4. Sometimes sound and uninjured seeds may fail to germinate due to reduced activity of the seed or seed parts resulting in blockade of the growth. This may be due to:

   A. External effects of environment
   B. Internal conditions within the plant itself, i.e. Embryo dormancy or seed coat dormancy
   C. Both (a) & (b)
   D. None of these

5. The unclassified area which constituted more than ____ of the total area at the time of independence, in due course of time, has dropped to the present level due to extension in the land use:

   A. 40%
   B. 50%
   C. 60%
   D. 70%

6. Presence of SO2 in atmosphere is indicated by:

   A. Mosses
   B. Liver worts
   C. Lichens
   D. Ferns

7. The presence of O3 in atmosphere of earth:

   A. Has been responsible for increasing the average global temperature in recent
   B. Is advantageous since it supplies O2 for people travelling in jets
   C. Hinders higher rate of photosynthesis
   D. Helps in checking the penetration of ultra violet rays to earth

8. Possibilities of presence of coal in a particular area can be guessed by the study of:

   A. Economic Botany
   B. Ecology
   C. Pollen analysis
   D. Mining the area

9. In big cities, air pollution is mainly due to:

   A. Burning of fossil fuel
   B. Thermal power plants
   C. Sewage
   D. Suspended particles

10. The extent of darkness caused due to smoke can be determined by the help of:

    A. Smoke filters
    B. Ringelmann’s charts
    C. Horizontal microscopes
    D. All of these