Q1. Volcanic eruptions release ________________ in the atmosphere.
- nitrogen
- oxygen
- carbon dioxide
- both oxygen and carbon dioxide
- Q2. Fertilizers are usually applied directly to the soil.
- True
- False
- Q3. Which soil is derived from basaltic rock?
- Red soil
- Black soil
- Laterite soil
- Both A and C
- Q4. The ozone is an allotrope of oxygen.
- True
- False
- Q5. Gases such as carbon dioxide, methane, nitric oxide and nitrous oxide in the atmosphere act as greenhouse gases.
- True
- False
- Q6. Soil has no role in supplying nutrients to aquatic biota.
- True
- False
- Q7. The coastal areas during day time are characterised by
- Movement of air from sea towards land
- Movement of air from land towards sea
- The flow of air in any direction
- Flow of air at a very high speed
- Q8. Which of the following microorganisms is present in the root nodules of leguminous plants?
- Azotobacter
- Nitrosomonas
- Rhizobium
- Pseudomonas
- Q9. The transfer of matter and energy between different components of biosphere is called
- Energy flow
- Food web
- Nutrient cycle
- Biogeochemical cycle
- Q10. Which of the following mainly decides biodiversity in a particular area?
- Quality of topsoil
- Chemical composition of middle soil
- Depth of bottom soil
- Different layers of soil
- Q11. Leaching is the process of nutrient enrichment of water bodies and subsequent overgrowth of plants on the surface of water.
- True
- False
- Q12. Nitrobacter is
- Putrefying bacteria
- Denitrifying bacteria
- Nitrifying bacteria
- Ammonifying bacteria
- Q13. Which of the following does not cause water pollution?
- Addition of fertilisers to water body
- Addition of dissolved oxygen to water body
- Addition of mercury salts to water body
- Addition of disease-causing bacteria to water body
- Q14. To prevent soil erosion, the slopes of mountains are divided into several flat fields. This method is called
- Conservation tillage
- Contour bunding
- Terrace farming
- None of the above
- Q15. All the Earth’s water bodies collectively form the hydrosphere.
- True
- False
- Q16. Smog is a type of
- Dew
- Fog
- Smoke and dust
- Mist
- Q17. Acid rain is the effect of
- Water pollution
- Soil pollution
- Noise pollution
- Air pollution
- Q18. Nitrogen-fixing bacteria such as azotobacter and nostoc are present in the root nodules of leguminous plants.
- True
- False
- Q19. Breakdown of bigger rocks into fine smaller mineral particles is called
- Paedogenesis
- Weathering
- Mineralisation
- Cracking
- Q20. The minerals present in rocks get dissolved in water which results in wearing of rocks.This process is called biological weathering
- True
- False
- Q21. Methane is produced naturally in the
- Digestive tract of termites
- Digestive tract of cows
- Digestive tract of humans
- Both A and B
- Q22. Recycling of nitrogen involves ammonification, nitrification and denitrification.
- True
- False
- Q23. Since the industrial revolution, the percentage of carbon dioxide in the atmosphere is said to have
- Halved
- Doubled
- Reduced
- Remained same
- Q24. Through which process is oxygen returned to the atmosphere?
- Combustion
- Photosynthesis
- Respiration
- Formation of nitrogen oxides
- Q25. The element forming a common constituent of DNA, RNA and vitamins is
- Argon
- Neon
- Copper
- Nitrogen
- Q26. Wind is caused by change in pressure or temperature.
- True
- False
- Q27. Surface water of Earth represents the most extensive habitat for the organisms.
- True
- False
- Q28. Dumping of untreated water sewage into rivers causes water pollution.
- True
- False
- Q29. Choose the denitrifying bacteria
- Azotobacter
- Nitrosomonas
- Pseudomonas
- nitrobacter
- Q30. Rhizobium bacteria have symbiotic relationship with leguminous plants.
- True
- False
- Get link
- X
- Other Apps
- Get link
- X
- Other Apps
Comments
Post a Comment