Answer:
E) Hydrogen peroxide
Explanation:
Hydrogen peroxide is the substance that has a brown color and is detected by the spectrophotometer in our reaction.
Answer:
air pressure or atmospheric pressure is referred to the force exerted on a particular surface by air present above due to the gravitational pull of the earth.
Explanation:
in simple terms -air has weight and it constantly exerts pressure against everything in the surrounding. This pressure uses gravitational pull of the earth to exert its force on or over a surface. This is called atmospheric or air pressure. It can be measured by using barometer. The unit of measurement is atm (atmosphere)
Negative impact on the environment by dams:
We all know that dams are important where there is heavy flow of water. Dams also have negative impact which are numerous and varied. They create impact on biological, chemical and physical properties. When dams are built across the river, fish migrations are affected. They also trap the sediments which affects the physical processes.
The temperature changes, composition of chemicals and the dissolved oxygen levels are not suitable for aquatic plants and animals. Due to the downstream of riverbed in dams it may affect more than 100 kilometers below a dam.
Thus, we can conclude that construction of dams can affect aquatic species, loss of forest, wetland and farmland and extinction of birds in the floodplains.
