Environmental Science MCQ (Multiple Choice Question) - Schoolingaxis.com

Environmental Science MCQ (Multiple Choice Question)

 Que- Electromagnetic radiation with wavelengths between 0.4 and 0.7 micrometers is called: 

a. Ultraviolet light 

b. Visible light 

c. Infrared light 

d. Microwaves 

Answer- Visible light 

Explanation-  The higher the frequency, the shorter the wavelength. The only part of the spectrum that we can see is called visible. Wavelengths between 0.4 and 0.7 micrometers are visible. It appears white but contains different colors.                     

Que- Which of the following has a wavelength shorter than that of violet light? 

a. Green light 

b. Blue light 

c. Infrared radiation 

d. Ultraviolet radiation 

Answer- Ultraviolet radiation 

Explanation-  Visible light is simply electromagnetic radiation in a range of wavelengths that our eyes are sensitive to. Visible wavelengths range from 0.0007 milimeters for red light, through orange, yellow, green, and blue, to 0.0004 milimeters for violet light. Ultraviolet is shorter wavelengths than violet.                     

Que- If very cold air is brought indoors and warmed with no change in its moisture content, the saturation vapor pressure of this air will______ and the relative humidity of this air will_____ . 

a. Increase, increase 

b. Decrease, decrease 

c. Increase, decrease 

d. Decrease, increase 

Answer- Increase, decrease 

Explanation-  If very cold air is brought indoors and warmed with no change in its moisture content, the saturation vapour pressure of this air will increase and the relative humidity of this air will decrease.                     

Que- Which of the following helps to explain why even though northern latitudes experience 24 hours of sunlight on June 22, they are not warmer than latitudes further south? 

a. Solar energy is spread over a larger area in northern latitudes 

b. Some of the sun's energy is reflected by snow and ice in the northern latitudes 

c. Increased cloud cover reflects solar energy in the northern latitudes 

d. All of the above 

Answer- All of the above 

Explanation-  All of the above                     

Que- Ozone hole was first discovered in   

a. Africa 

b. Antarctica 

c. India 

d. Europe  

Answer- Antarctica 

Explanation-  The discovery of the annual depletion of ozone above the Antarctic was first announced in a paper by Joe Farman, Brian Gardiner and Jonathan Shanklin which appeared in Nature in May 1985. Later, NASA scientists re-analyzed their satellite data and found that the whole of the Antarctic was affected.                     

Que- The world's biggest GHG emitter is   

a. China 

b. USA 

c. India 

d. South Africa  

Answer- China 

Explanation-  The world's biggest GHG emitter is China.                     

Que- Where was the Stockholm conference on Human Environment held? 

a. Sweden  

b. Austria  

c. India  

d. Greece 

Answer- Sweden  

Explanation-  The United Nations Conference on the Human Environment was held in Stockholm, Sweden from June 5–16 in 1972.                     

Que- Pencillium does not swallow the growth of bacterium Staphylococcus. This sort of relationship is called 

a. commensalism 

b. predation 

c. amensalism 

d. mutualism 

Answer- amensalism 

Explanation-  Pencillium does not swallow the growth of bacterium Staphylococcus. This sort of relationship is called amensalism.                     

Que- The Salim Ali Bird sanctuary is located at 

a. Pondicherry,  

b. Thattekad,  

c. Anakkatti  

d. Kalakkad 

Answer- Thattekad,  

Explanation-  The Thattekkad Bird Sanctuary has a rich and varied birdlife. Several species of birds, both forest birds as well as the water birds, visit the sanctuaries                     

Que- The instrument that measures temperature, pressure, and humidity at various altitudes in the atmosphere: 

a. Barograph 

b. Radiosonde 

c. Aneroid barometer 

d. Altimeter 

Answer- Radiosonde 

Explanation-  The radiosonde is a balloon-borne instrument platform with radio transmitting capabilities. Originally named a radio-meteorograph, the instrument is now referred to as a radiosonde, a name apparently derived by H. Hergesell from a combination of the words  " radio "  for the onboard radio transmitter and  " sonde " , which is messenger from old English.The radiosonde contains instruments capable of making direct in-situ measurements of air temperature, humidity and pressure with height, typically to altitudes of approximately 30 km. These observed data are transmitted immediately to the ground station by a radio transmitter located within the instrument package.                      

Que- The species that flower are called 

a. gymnosperms  

b. bryophytes  

c. angiosperms  

d. algae 

Answer- angiosperms  

Explanation-  The angiosperms (also called flowering plants) are a major group of land plants, with 250,000 species having been described.Angiosperms comprise one of the two groups in the seed plantsThe flowering plants cover their seeds by including them in a true fruit. They bear the reproductive organs in a structure called a flower; the ovule is enclosed within a carpel (female reproductive organ of a flower), which will lead to a fruit.                      

Que- Basidiospores are considered to be a major source of   

a. airborne allergens 

b. water borne allergens 

c. animal faeces 

d. bioweapon 

Answer- airborne allergens 

Explanation-  A basidiospore is a reproductive spore produced by Basidiomycete fungi, a grouping that includes mushrooms, shelf fungi, rusts, and smuts. Basidiospores typically each contain one haploid nucleus that is the product of meiosis, and they are produced by specialized fungal cells called basidia                     

Que- Centre of Modern nuclear technology in India 

a. CRAS  

b. SARC  

c. BARC  

d. None of these 

Answer- BARC  

Explanation-  The Bhabha Atomic Research Centre (BARC) is India's premier nuclear research facility, headquartered in Trombay, Mumbai, Maharashtra. BARC is a multi-disciplinary research centre with extensive infrastructure for advanced research and development covering the entire spectrum of nuclear science, engineering and related areas.BARC's core mandate is to sustain peaceful applications of nuclear energy, primarily for power generation.                     

Que- The north-facing side of a hill in a mountainous region in the US tends to: 

a. Receive less sunlight during a year than the south-facing side 

b. Grow a variety of trees that are typically observed at higher elevation 

c. Be a better location for a ski run than the south-facing side 

d. All of the above 

Answer- All of the above 

Explanation-  All of the above                      

Que- What scale is useful to record the force of wind ? 

a. Decibel 

b. Richter 

c. Beau fort 

d. Fajita 

Answer- Beau fort 

Explanation-  The Beaufort scale is an empirical measure that relates wind speed to observed conditions at sea or on land. Its full name is the Beaufort wind force scale.The scale was devised in 1805 by the Irish hydrographer Francis Beaufort (later Rear Admiral Sir Francis Beaufort), a Royal Navy officer, while serving on HMS Woolwich.                      

Que- Organisms which are predominantly found living on, in or near bed sediments of rivers or lakes are known as   

a. nektonic 

b. neuston 

c. benthic 

d. planktonic  

Answer- benthic 

Explanation-  Because light is absorbed before it can reach deep ocean-water, the energy source for deep benthic ecosystems is often organic matter from higher up in the water column that drifts down to the depths.                      

Que- Unleaded petrol contains  __________ which are known as carcinogenic compounds 

a. nitrates 

b. sulphates 

c. benzene 

d. phosphates  

Answer- benzene 

Explanation-  Benzene is also a natural part of crude oil and gasoline (and therefore motor vehicle exhaust), as well as cigarette smoke.Benzene is among the 20 most widely used chemicals in the United States. It is used mainly as a starting material in making other chemicals, including plastics, lubricants, rubbers, dyes, detergents, drugs, and pesticides. In the past it was also commonly used as an industrial solvent (a substance that can dissolve or extract other substances) and as a gasoline additive, but these uses have been greatly reduced in recent decades.The link between benzene and cancer has largely focused on leukemia and other cancers of blood cells.                     

Que- Which of the following is mainly responsible for the extinction of wild life 

a. Pollution of air and water 

b. Hunting of flesh 

c. Destruction of Habitats 

d. All of these 

Answer- All of these 

Explanation-  All of these.                     

Que- The percentage of water vapour present in the air compared to that required for saturation is the: 

a. Mixing ratio 

b. Absolute humidity 

c. Dew point 

d. Relative humidity 

Answer- Relative humidity 

Explanation-  Air with a 50 percent relative humidity actually contains one-half the amount of water vapor required for saturation. Air with a 100 percent relative humidity is said to be saturated because it is filled to capacity with water vapour.                     

Que- Major cause of Ozone depletion is due to which chemical? 

a. ChloroFluoroCarbons  

b. Polyphenols  

c. Dioxins  

d. Rayon 

Answer- ChloroFluoroCarbons  

Explanation-  Chlorofluorocarbons (CFCs) and other halogenated ozone depleting substances (ODS) are mainly responsible for man-made chemical ozone depletion. The total amount of effective halogens (chlorine and bromine) in the stratosphere can be calculated and are known as the equivalent effective stratospheric chlorine (EESC).                     

Que- Rain during November is more acidic than monsoon rain due to 

a. dissolved CO2 

b. dissolved SO2 

c. dissolved NO2 

d. none of the above. 

Answer- dissolved SO2 

Explanation-  Rain during November is more acidic than monsoon rain due to dissolved SO2.                      

Que- The formula for exponential population growth is 

a. dN/dt = rN 

b. dt/dN = rN 

c. dN/rN = dt 

d. rN/dN = dt 

Answer- dN/dt = rN 

Explanation-  The formula of exponential growth is dN/dt=rN where dN/dt is the rate of change in population size, r is the biotic potential and N is the population size.                     

Que- Which of the following type of pollution can cause the outbreak of jaundice 

a. Air  

b. Thermal  

c. Water  

d. Land 

Answer- Water  

Explanation-  Water pollution can cause the outbreak of jaundice. Jaundice is caused by the organism Seriola quinqueradiata. The disease is characterised by yellow colorations of the skin, these yellow colourations are majorly due to the build-up of bilirubin in the blood.                     

Que- India is primary centre of domestication of 

a. Sheep  

b. Goat  

c. Water Buffalo  

d. Elephants 

Answer- Water Buffalo  

Explanation-  Vavilov centers are regions where a high genetic diversity can be found, representing the natural relatives of domesticated crop plants or animals. These areas are also called the primary areas of domestication. India is a primary center of domestication of Water Buffalo.                     

Que- Which is an example for sedimentary biogeochemical cycle 

a. Oxygen cycle  

b. Nitrogen cycle  

c. Water cycle  

d. Phosphorus cycle 

Answer- Phosphorus cycle 

Explanation-  Sedimentary cycles include those of iron, calcium, phosphorus, sulfur, and other more-earthbound elements.                     

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