Environment
#311
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1. Which of the following is not the impact of deforestation in India?
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Urbanisation is primarily a major driver of land-use change and deforestation rather than a direct ecological impact of deforestation. Deforestation can cause soil erosion, biodiversity loss, habitat fragmentation, altered water cycles and increased carbon emissions.
#314
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2. Environment is a indivisible unit which is created by:
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Environment is treated as an integrated system consisting of physical, biological and cultural components. Physical resources include air, water and soil; biological components include plants, animals and microorganisms; cultural components arise from human society and activities.
#337
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3. To protect the Indian Tigers, ‘Project Tiger’ was launched in the year?
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Project Tiger is India’s flagship tiger-conservation programme. It was launched in April 1973, initially covering nine tiger reserves.
#349
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4. Which one of the following is not responsible for global warming?
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Argon is a noble gas and is not a greenhouse gas of significance. Carbon dioxide, methane and water vapour are greenhouse gases; water vapour is the most abundant greenhouse gas.
#350
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5. Ecology is the study of relationship between:
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Ecology is the scientific study of interactions among organisms and between organisms and their environment.
#369
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6. The ‘Global Warming’ is due to:
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An increase in atmospheric greenhouse gases, especially carbon dioxide, strengthens the greenhouse effect and drives long-term warming. CO₂ concentrations rise mainly from fossil-fuel combustion, land-use change and cement production.
#370
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7. ‘Narmada Bachao Andolan’ is associated with:
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Medha Patkar is a prominent leader of the Narmada Bachao Andolan, which opposed displacement and raised environmental and rehabilitation issues around large dams. The movement is strongly associated with the Sardar Sarovar Project on the Narmada River.
#394
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8. Deforestation is NOT a direct cause of:
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Deforestation directly causes habitat loss, biodiversity decline, soil erosion and higher carbon emissions. Species invasion depends on additional ecological and human factors.
#398
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9. A non-renewable source of energy is:
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Petroleum is a fossil fuel formed over geological time and is therefore non-renewable. Solar, wind and biogas are renewable sources.
#425
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10. A major cause of rise in sea level is:
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Modern sea-level rise is driven mainly by thermal expansion of seawater and melting of land-based glaciers and ice sheets. Melting floating sea ice has little direct effect.
#430
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11. Ringelmann scale measures the density/opacity of:
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The Ringelmann scale measures the apparent density or opacity of smoke from industrial stacks. It is an air-pollution assessment method.
#431
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12. The main component of biogas is:
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Methane is the major component of biogas, commonly about 50–75%. Biogas is produced by anaerobic digestion of organic matter.
#440
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13. ECOMARK is related to:
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The Ecomark scheme was introduced in 1991 to identify products meeting environmental criteria. It was associated with the Bureau of Indian Standards.
#457
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14. Which is NOT a renewable energy source?
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Nuclear energy is non-renewable because it depends on finite nuclear fuels such as uranium. Solar, wind and hydropower are renewable energy sources.
#464
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15. The Environment (Protection) Act was enacted in:
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The Environment (Protection) Act, 1986 provides a broad legal framework for environmental protection and improvement in India.
#549
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16. Which one of the following ecosystem covers the largest areas of the earth’s surface?
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The marine ecosystem covers the largest area because oceans and seas occupy about 71% of Earth’s surface.
#550
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17. Which of the following is known as ‘carbon negative country’ in the world?
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Bhutan is widely recognised as a carbon-negative country because its forests absorb more carbon dioxide than the country emits. Its constitution requires at least 60% forest cover to be maintained.
#581
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18. Generally, environment can be classified as following categories. Which among the following is not a part of such category?
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Broad environmental categories include physical environment, biological environment and cultural/social environment. Operational Environment is not a basic category.
#582
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19. The main reason for the decrease in biodiversity is:
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The major driver of biodiversity loss is natural habitat destruction and degradation, caused by land conversion, infrastructure, agriculture and habitat fragmentation.
#609
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20. In a food chain, man is:
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Primary as well as secondary Consumer. In a food chain, man is primary consumer as he eats vegetables (herbivores) as well as secondary consumer as he eats meats and fishes (carnivores) Humans may occupy different trophic levels depending on diet.
