Environmental Science MCQ Questions and answers | EVS MCQ

Rainfall that is acidic, possesses elevated H+ ion concentrations, and has been commonly known as ‘acid rain’.
the contribution from SO2 is considerably smaller than during the 1970s, so that currently, oxidised and reduced nitrogen dominate acid deposition. Deposition of reduced nitrogen (N) compounds, e.g.NH4+, can acidify via microbial transformations in the soil and also assimilation in plants leading to acidification of the rhizospehere. Other compounds also contribute to acid deposition, e.g. hydrochloric acid (HCl)

Skin cancer is an abnormal growth of skin cells. It most often develops on areas of the skin exposed to the sun’s rays. Skin cancer affects people of all colors and races, although those with light skin who sunburn easily have a higher risk.

The process that we call "burning" actually is chemical reactions with oxygen in the air. For the most part, the carbon combines with oxygen to form carbon dioxide (CO2), and the hydrogen combines with oxygen to form water vapor (H20).
In both of these chemical reactions a substantial amount of energy is released as heat. Since heat is what is needed to instigate these chemical reactions, we have a chain reaction: reactions cause heat, which causes reactions, which cause heat, and so on.
Once started the process continues until nearly all of the fuel has gone through the process (i.e., burned), or until something is done to stop it. Of course, the reason for arranging all this is to derive the heat.

soil pollution as part of land degradation is caused by the presence of xenobiotics (human-made) chemicals or other alteration in the natural soil environment.

Aestivation is summer sleep and during aestivation, animals usually tend to rest in a shady and cool place. They take sleep during the hot hours of daytime.
Hibernation is a winter sleep and in this sleep, an organism tend to pass the time in dormant conditions. They are not active at all. The find a warm place for themselves to protect their body from the surrounding cold environment.

Freezing fog, which deposits rime, is composed of droplets of supercooled water that freeze to surfaces on contact.
Precipitation fog (or frontal fog) forms as precipitation falls into drier air below the cloud, the liquid droplets evaporate into water vapor.

Fine organic or inorganic particles suspended in air is called as aerosol particulate matter. It consists of soot, flash, and dust of various types, fur, hair, spores etc. It is classified into settleable and suspended particulate matter.

Chlorofluorocarbons (CFCs) are nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, and fluorine. They are used in the manufacture of aerosol sprays, blowing agents for foams and packing materials, as solvents, and as refrigerants.

The Ramsar Convention on Wetlands of International Importance especially as Waterfowl Habitat is an international treaty for the conservation and sustainable use of wetlands.
It is also known as the Convention on Wetlands. It is named after the city of Ramsar in Iran, where the Convention was signed in 1971.

The term upper atmosphere usually refers to the region of the atmosphere above the troposphere.
Many remote sensing satellites follow the near polar sun-synchronous orbits at a height around 800 km, which is well above the thermopause.