Radioactive and other Gaseous Pollution MCQs with Explanations
Practice MCQ Questions
Ques: 1
Which of the following statements about Radioactive pollution are correct?
It causes a hereditary change in the animals.
It causes disbalance among different minerals in the soil.
It hinders blood circulation.
It causes carcinogenesis.
Select the correct answer from codes given below:
Codes :
Correct Answer:
(C) 1, 3 and 4
Radioactive pollution causes hereditary changes in the all living organism. It hinders blood circulation and causes carcinogenesis. It does not cause disbalance among different minerals in the soil. Hence (c) is the correct answer.
Ques: 2
Euro emission norms are emission standards and these represent a package setting limits for emission from a vehicle. Which of the following gases is covered under this?
Correct Answer:
(D)
All of the above
Euro emission standards define the acceptable limits for exhaust emission of new vehicles sold in the European Union. Emission of nitrogen oxides, hydrocarbon, non- methane hydrocarbons, carbon monoxide and particulate matter are regulated for the most vehicle type. It is notable that European countries introduced 'Euro I' standard in 1992. Significantly, Mashelkar Committee for National Auto fuel Policy suggested implementation of Euro standard to control pollution. Importantly, BS VI standard was implemented in India starting April 1, 2020. BS-7 emission norms are set to be implemented by the Government between the Period of 2025 - 2026.
Note: To meet Euro-II emission standards, the sulphur content should be 0.05 per cent or less than this in the ultralow sulphur diesel.
Ques: 3
Carbon monoxide, emitted by vehicles which turn to carbon dioxide by the catalyst converter, whose ceramic disc is controlled by?
Correct Answer:
(D)
Palladium
A catalytic converter is an emission control device that converts toxic gases and pollutants in the exhaust gas to less toxic pollutants by catalyzing a redox reaction. The catalyst itself is most often a mix of precious metals. Palladium and Platinum are two such precious metals used.
Ques: 4
Consider the following statements regarding Radioactive Pollution:
1. It occurs when radioactive materials are present or deposited in the atmosphere.
2. Human activities are considered to be 100 percent responsible for the radiation we are exposed to.
Which of the statements given above is/are correct?
Correct Answer:
(A) 1 only
Radioactive Pollution is defined as the increase in the natural radiation levels in the environment that pose a serious threat to humans and other life forms.
Radioactive pollution occurs when radioactive materials are present or deposited in the atmosphere or environment, especially when their presence is unintentional and poses a risk to the environment due to radioactive decay.
The radioactive materials destroying emitting hazardous ionizing radiation (radioactive decay) such as beta or alpha particles, gamma rays, or neurons into the environment where they exist.
Human activities are considered to be responsible for around 20% of the radiation we are exposed to.
Ques: 5
Consider the following:
1. Sulphur Dioxide (SO2)
2. Ammonia (NH3)
3. Carbon Monoxide (CO)
4. Nitrogen Oxide (NOx)
Which of the given above are considered as gaseous pollutants:
Correct Answer:
(D)
All of the above
Key Gaseous Pollutants and Their Sources:
Carbon Monoxide (CO): A colorless, odorless gas produced by the incomplete burning of fossil fuels and other materials.
Nitrogen Oxides (NOx): Gases like nitrogen dioxide (NO2) and nitric oxide (NO), formed during combustion processes in vehicles, power plants, and other industries.
Volatile Organic Compounds (VOCs): Organic chemicals with high vapor pressure, released from various sources like paints, cleaning products, and gasoline.
Sulphur Dioxide (SO2): A gas produced by the burning of coal and oil in power plants, as well as industrial processes.
Ammonia (NH3): A gas emitted from agricultural processes, particularly livestock waste and fertilizer use.
Greenhouse Gases: Gases like carbon dioxide, methane, and nitrous oxide, which contribute to global warming and climate change.