The correct answer is (C) : B and C
Highly polluted water should have BOD value of 17 ppm or more.
The value of current \( I \) in the electrical circuit as given below, when the potential at \( A \) is equal to the potential at \( B \), will be _____ A.
Two light beams fall on a transparent material block at point 1 and 2 with angle \( \theta_1 \) and \( \theta_2 \), respectively, as shown in the figure. After refraction, the beams intersect at point 3 which is exactly on the interface at the other end of the block. Given: the distance between 1 and 2, \( d = \frac{4}{3} \) cm and \( \theta_1 = \theta_2 = \cos^{-1} \left( \frac{n_2}{2n_1} \right) \), where \( n_2 \) is the refractive index of the block and \( n_1 \) is the refractive index of the outside medium, then the thickness of the block is …….. cm.
Environmental chemistry is the study of chemical processes and their impacts on the natural environment. It is a multidisciplinary field that combines principles from chemistry, ecology, biology, and geology to understand the complex interactions between chemicals and living organisms.
Environmental chemists investigate how pollutants such as toxic metals, organic chemicals, and pesticides affect ecosystems, including soil, water, and air. They also develop methods to monitor and measure these pollutants, as well as techniques for their removal or remediation.
Environmental chemistry also examines the impact of natural processes on the environment, such as the cycling of nutrients and the chemical reactions that occur in the atmosphere, oceans, and soil. This research can inform policy decisions related to environmental protection and management.
Read More: Difference Between Environment and Ecology
Examples of environmental chemistry applications include studying the effects of acid rain on ecosystems, developing methods for treating contaminated water and soil, and understanding the sources and fate of greenhouse gases in the atmosphere.
Overall, environmental chemistry plays a crucial role in identifying and addressing environmental problems, and it is essential for ensuring a sustainable future for our planet.