Q171. Which gas binds with hemoglobin in the blood to reduce its oxygen-carrying capacity?
Health, Environment and Agriculture: RAS Prelims MCQs
662 RAS Prelims practice MCQs on health, environment and agriculture are on this page, in 4 chapters. They cover human health, food, nutrition and public health programmes, environmental and ecological changes and impact assessment, biodiversity and conservation of natural resources, and agriculture, horticulture, forestry and animal husbandry in Rajasthan. Each question has an answer and an explanation.
Practice questions based on the RPSC RAS Prelims syllabus. They follow the exam pattern but are not past-paper questions.
Showing 171–180 of 662 questions
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Q172. The main components responsible for the formation of acid rain are:
Explanation
Atmospheric precipitation becomes acidic when certain gases react with water, oxygen, and other chemicals. The primary contributors are compounds released during the combustion of fossil fuels in power plants and vehicles. Once in the air, these substances transform into sulfuric and nitric acids. These acids then fall to the ground as rain, snow, or fog, damaging forests and aquatic ecosystems.
Q173. Particulate Matter (PM) 2.5 is particularly dangerous to human health because:
Explanation
Extremely small airborne particles pose a significant threat to human health due to their ability to bypass the natural filtration systems in the nose and throat. These fine particles can travel deep into the lungs and even pass directly into the bloodstream. Once inside the circulatory system, they can cause widespread inflammation and contribute to various respiratory and cardiovascular diseases over time.
Q174. Photochemical smog is characterized by the presence of which secondary pollutant?
Explanation
Photochemical smog is a complex mixture of pollutants formed when nitrogen oxides and volatile organic compounds react in the presence of sunlight. This type of haze contains several harmful secondary substances. One particularly toxic compound is known for causing eye irritation and damaging plant tissues. Its presence is a key indicator of the chemical reactions taking place in polluted urban air.
Q175. Regarding indoor air pollution, consider the following statements:
I. Radon gas is a natural source of indoor air pollution.
II. Biomass burning in rural kitchens is a major cause in developing countries.
III. Indoor air pollution cannot cause chronic obstructive pulmonary disease (COPD).
Which of the above statement(s) is/are correct?
I. Radon gas is a natural source of indoor air pollution.
II. Biomass burning in rural kitchens is a major cause in developing countries.
III. Indoor air pollution cannot cause chronic obstructive pulmonary disease (COPD).
Which of the above statement(s) is/are correct?
Explanation
Air quality inside buildings can be worse than outside due to various factors. Natural sources like radioactive gases seeping from the ground and the use of solid fuels for cooking in poorly ventilated spaces are major concerns. Long-term exposure to these pollutants is a well-documented cause of serious respiratory conditions, including chronic lung diseases that significantly impact the health of vulnerable populations.
Q176. The National Air Quality Index (AQI) in India considers how many pollutants for measurement?
Explanation
To provide a clear and easily understandable measure of air quality, authorities monitor a specific group of major pollutants.
Q177. Which of the following is an occupational respiratory disease common among coal miners?
Explanation
Workers in certain industries face specific health risks due to the substances they inhale daily. Those employed in underground mining are often exposed to high levels of fine carbon dust. Over many years, this dust accumulates in the lungs, leading to inflammation and scarring. This chronic respiratory condition reduces lung function and is a well-known hazard associated with the extraction of coal.
Q178. Fly ash is a major environmental pollutant generated primarily by:
Explanation
A fine, powdery byproduct is produced when pulverized coal is burned to generate electricity. This material is carried away from the combustion chamber by exhaust gases. While it can be captured by filtration systems, its disposal remains a significant environmental challenge. If not managed properly, it can contaminate air, soil, and water near the large facilities that rely on solid fuels.
Q179. The ‘Air (Prevention and Control of Pollution) Act’ was enacted in India in which year?
Explanation
To address the growing problem of atmospheric contamination, the Indian government established a dedicated legal framework in the early nineteen-eighties. This legislation provides for the prevention, control, and abatement of air pollution. It also empowered specific boards to set standards and regulate emissions from various industrial and domestic sources, marking a significant step in the country’s efforts toward environmental protection and management.
Q180. Which of the following technologies is used in smokestacks to reduce particulate matter emissions?
Explanation
Large industrial facilities use specialized equipment to remove fine particles from exhaust gases before they are released into the atmosphere. One highly effective device uses high-voltage electricity to give the particles a charge, causing them to stick to collection plates. This method allows for the removal of a vast majority of the dust and soot, significantly improving the local air quality.Answer key for these questions
| Q | Correct answer |
|---|---|
| 171 | (c) Carbon monoxide |
| 172 | (a) Sulfur dioxide and Nitrogen oxides |
| 173 | (d) It enters the blood via natural defenses |
| 174 | (b) Peroxyacetyl nitrate (PAN) |
| 175 | (a) I and II only |
| 176 | (b) Eight |
| 177 | (a) Pneumoconiosis (Black lung disease) |
| 178 | (b) Thermal power plants using coal |
| 179 | (b) 1981 |
| 180 | (a) Electrostatic precipitators |
Key facts from Health, Environment and Agriculture
- The RPSC General Science syllabus includes human health and nutrition, environmental change, biodiversity and the agriculture of Rajasthan.
- Health questions pair a deficiency or a programme with its cause or target, for example iron with anaemia.
- Environment questions cover ecosystems, pollutants, laws and treaties, including carbon markets.
- Rajasthan agriculture questions deal with dryland farming, crops of the arid zones and the State’s agro-climatic zones.
- Science and technology, policies and defence are on the Science and Technology page.
Frequently asked questions
How many RAS Prelims practice MCQs are there on Health, Environment and Agriculture?
This page has 662 practice MCQs on Health, Environment and Agriculture. Each has the correct answer, and most have an explanation.
Which chapters does this set cover?
Four chapters: human health, food, nutrition and public health programmes; environmental and ecological changes and their impact assessment; biodiversity, conservation of natural resources and sustainable development; and agriculture, horticulture, forestry and animal husbandry in Rajasthan.
Are health, environment and agriculture part of the RAS Prelims syllabus?
Yes. The General Knowledge and General Science paper includes human health, nutrition, environment, biodiversity and the agriculture sector of Rajasthan, so these topics can be asked every year.
How can I revise this part of the syllabus?
Make short lists of deficiency diseases, pollutants, laws and treaties, and Rajasthan crops and zones. Attempt each chapter, read the explanations of the misses and revisit the lists after a few days.