Question 47

Radon is a radioactive odorless gas.

Radon is a naturally occurring radioactive gas that is colorless, tasteless, and odorless. It is produced from the decay of uranium in soil, rock, and water, making it a significant environmental hazard.

A) radon

Radon is indeed a radioactive gas that is both odorless and tasteless. It is formed from the decay of uranium and can accumulate in homes, particularly in basements, posing serious health risks due to its radioactive properties.

B) asbestos

Asbestos is a group of minerals that are fibrous in nature and known for their heat resistance. It is not a gas, nor is it radioactive, making it an incorrect choice for the question regarding a radioactive odorless gas.

C) formaldehyde

Formaldehyde is a colorless gas with a strong odor, commonly used in building materials and household products. It is not radioactive, which disqualifies it as an answer to the question posed.

D) carbon monoxide

Carbon monoxide is a colorless, odorless gas that is produced by burning fossil fuels. While it is indeed hazardous, it is not radioactive, and therefore does not fit the criteria of the question.

Conclusion

Radon is the only option that meets the criteria of being a radioactive and odorless gas, while all other options are either non-radioactive or do not fit the description of a gas. This distinction makes radon the correct answer, highlighting the importance of recognizing the characteristics of different substances in environmental health contexts.