McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Uncategorized topics , Union Public Service Commission (UPSC) .
| 101. |
Air pollution is severe in |
| A. | Cities |
| B. | Industrialised areas |
| C. | Densely populated areas |
| D. | all of these |
| Answer» D. all of these | |
| 102. |
Particulate pollutants are |
| A. | are small solid particles and liquid droplets |
| B. | liquid droplets in atmosphere |
| C. | are small solid particles released into the atmosphere |
| D. | all of these |
| Answer» A. are small solid particles and liquid droplets | |
| 103. |
All are particulate pollutants except |
| A. | dust |
| B. | ozone |
| C. | soot |
| D. | smoke |
| Answer» B. ozone | |
| 104. |
Fine organic or inorganic particles suspended in air is called |
| A. | particulate pollutant |
| B. | gaseous pollutant |
| C. | aerosol |
| D. | none of these |
| Answer» C. aerosol | |
| 105. |
Which of the following is a secondary pollutant |
| A. | CO2 |
| B. | CO |
| C. | O3 |
| D. | SO2 |
| Answer» C. O3 | |
| 106. |
Air pollution can be of |
| A. | natural origin |
| B. | artificial or man made origin |
| C. | both a and b |
| D. | b only |
| Answer» C. both a and b | |
| 107. |
Mobile combustion accounts |
| A. | 10-20% of air pollution |
| B. | 40-50% of air pollution |
| C. | 50-60 % of air pollution |
| D. | 5-10 % of air pollution |
| Answer» C. 50-60 % of air pollution | |
| 108. |
The true statement about ‘green house effect’ is that it is |
| A. | caused by combination of many gases |
| B. | caused by CO2 |
| C. | caused only by CO2, CFC, CH4 and NO2 gases |
| D. | None of these |
| Answer» C. caused only by CO2, CFC, CH4 and NO2 gases | |
| 109. |
The supersonic jets cause pollution by the thinning of |
| A. | CO2 layer |
| B. | SO2 layer |
| C. | O3 layer |
| D. | O2 layer |
| Answer» C. O3 layer | |
| 110. |
Carbon mono oxide is a pollutant because |
| A. | it reacts with O2 |
| B. | it inhibits glycolysis |
| C. | makes nervous system inactive |
| D. | reacts with haemoglobin |
| Answer» D. reacts with haemoglobin | |
| 111. |
A population is a group of |
| A. | individuals in a species |
| B. | species in a community |
| C. | communities in an ecosystem |
| D. | individuals in a family |
| Answer» A. individuals in a species | |
| 112. |
What is the most important factor for the success of animal population? |
| A. | natality |
| B. | adaptability |
| C. | unlimited food |
| D. | inter species activity |
| Answer» B. adaptability | |
| 113. |
The formula for exponential population growth is |
| A. | dN/dt = rN |
| B. | dt/dN = rN |
| C. | dN/rN = dt |
| D. | rN/dN = dt |
| Answer» A. dN/dt = rN | |
| 114. |
Human population growth curve is a: |
| A. | S shaped curve |
| B. | parabola curve |
| C. | J shaped curve |
| D. | zig zag curve |
| Answer» C. J shaped curve | |
| 115. |
Exponential growth occurs when there is |
| A. | a great environmental resistance |
| B. | no environmental resistance |
| C. | no biotic potential |
| D. | a fixed carrying capacity |
| Answer» B. no environmental resistance | |
| 116. |
A human population is small, there is a greater chance of : |
| A. | gene flow |
| B. | genetic drift |
| C. | natural selection |
| D. | mutation |
| Answer» B. genetic drift | |
| 117. |
In a population, unrestricted reproductive capacity is called as |
| A. | carrying capacity |
| B. | biotic potential |
| C. | birth rate |
| D. | fertility rate |
| Answer» C. birth rate | |
| 118. |
The concept that 'population tends to increase geometrically while food supply increases arithmetically’ was put forward by |
| A. | Adam Smith |
| B. | Charles Darwin |
| C. | Thomas Malthus |
| D. | Stuart Mill |
| Answer» C. Thomas Malthus | |
| 119. |
Two opposite forces operate in the growth and development of every population. One of them is related to the ability to reproduce at a given rate. The force opposite to it is called |
| A. | fecundity |
| B. | mortality |
| C. | environmental resistances |
| D. | biotic control |
| Answer» B. mortality | |
| 120. |
The carrying capacity of a population is determined by its |
| A. | population growth rate |
| B. | natality |
| C. | mortality |
| D. | limiting resources |
| Answer» D. limiting resources | |
| 121. |
The major pollutant from automoblie exhaust is |
| A. | NO |
| B. | CO |
| C. | SO2 |
| D. | Soot |
| Answer» B. CO | |
| 122. |
The green house gases, otherwise called radioactively active gases includes |
| A. | Carbon dioxide |
| B. | CH4 |
| C. | N2O |
| D. | All of these |
| Answer» D. All of these | |
| 123. |
Algal bloom results in |
| A. | Global warming |
| B. | Salination |
| C. | Eutrophication |
| D. | Biomagnification |
| Answer» C. Eutrophication | |
| 124. |
A high Biological Oxygen Demand (BOD) indicates that: |
| A. | water is pure |
| B. | absence of microbial action |
| C. | Low level of microbial pollution |
| D. | High level of microbial pollution |
| Answer» D. High level of microbial pollution | |
| 125. |
The effects of radioactive pollutants depends upon |
| A. | Rate of diffusion |
| B. | energy releasing capacity |
| C. | rate of deposition of the contaminant |
| D. | all of these |
| Answer» D. all of these | |
| 126. |
The range of normal human hearing is in the range of |
| A. | 10 Hz to 80 Hz |
| B. | 50 Hz to 80 Hz |
| C. | 50Hz to 15000 Hz |
| D. | 15000 Hz and above |
| Answer» C. 50Hz to 15000 Hz | |
| 127. |
The pollution which does not persistent harm to life supporting system is |
| A. | Noise pollution |
| B. | Radiation pollution |
| C. | Organochlorine pollution |
| D. | All of these |
| Answer» A. Noise pollution | |
| 128. |
Soap and detergents are the source of organic pollutants like: |
| A. | glycerol |
| B. | polyphosphates |
| C. | sulphonated hydrocarbons |
| D. | all of these |
| Answer» D. all of these | |
| 129. |
Growing agricultural crops between rows of planted trees is known as |
| A. | Social forestry |
| B. | Jhum |
| C. | Taungya system |
| D. | Agroforestry |
| Answer» C. Taungya system | |
| 130. |
The main atmospheric layer near the surface of earth is |
| A. | troposphere |
| B. | mesophere |
| C. | ionosphere |
| D. | stratosphere |
| Answer» A. troposphere | |
| 131. |
Man made sources of radiation pollution are: |
| A. | mining |
| B. | explosion of nuclear weapons |
| C. | nuclear fuels and preparation of radioactive isotopes |
| D. | all of these |
| Answer» D. all of these | |
| 132. |
The cutting down of trees and setting them on fire and raising crops on the resulting ash is called: |
| A. | Pyrolysis |
| B. | Jhum |
| C. | Taungya system |
| D. | Shift cultivation |
| Answer» B. Jhum | |
| 133. |
Percentage of forest area recommended by the the national forest policy for plains is |
| A. | 33% |
| B. | 67% |
| C. | 30% |
| D. | 10% |
| Answer» A. 33% | |
| 134. |
Example of primary pollutant |
| A. | SO2 |
| B. | NO2 |
| C. | CO |
| D. | hydrocarbons |
| Answer» D. hydrocarbons | |
| 135. |
Commonly used radioactive isotopes in scientific research |
| A. | 14 C |
| B. | 125 I |
| C. | 32 P |
| D. | all of these |
| Answer» D. all of these | |
| 136. |
Drinking of fluoride containing water results : |
| A. | fluorosis |
| B. | chlorosis |
| C. | minemata |
| D. | methaemoglobinema |
| Answer» A. fluorosis | |
| 137. |
Chipco movement is a public agitation that occurred in |
| A. | Mansbal area in Kashmir |
| B. | Silent valley in Kerala |
| C. | Sundarban area in Bengal |
| D. | Tehri Garhwal area of Uttar Pradesh |
| Answer» D. Tehri Garhwal area of Uttar Pradesh | |
| 138. |
High biological oxygen demand indicates: |
| A. | absence of microbial pollution |
| B. | moderate microbial pollution |
| C. | intense level of microbial pollution |
| D. | all of these |
| Answer» C. intense level of microbial pollution | |
| 139. |
Ozonosphere seen in |
| A. | ionosphere |
| B. | thermosphere |
| C. | mesophere |
| D. | stratosphere |
| Answer» D. stratosphere | |
| 140. |
Harmful trace metals in fly ash: |
| A. | antimony |
| B. | cadmium |
| C. | arsenic |
| D. | all of the above |
| Answer» D. all of the above | |
| 141. |
In a pyramid of numbers, in a grassland ecosystem, the largest population is that of |
| A. | Producers |
| B. | Tertiary Consumers |
| C. | Secondary consumers |
| D. | Herbivores |
| Answer» A. Producers | |
| 142. |
Which of the following statements regarding species interdependence are true? A) An association of two species where one is benefitted and other remains unaffected called mutualism B) An interspecific association where both partners derive benefit from each other is called commensalism C) A direct food relation between two species of animals in which one animals kills and feed on another is referred as predation D) A relationship between two species of organism where both the partners are benefitted from each other is called symbiosis. |
| A. | A and B only |
| B. | C and D only |
| C. | A and C only |
| D. | B and C only |
| Answer» B. C and D only | |
| 143. |
The formula of growth rate for population in given time is |
| A. | dt/dN=rN |
| B. | dt/rN=dN |
| C. | dt/rN=dt |
| D. | dN/dt=rN |
| Answer» D. dN/dt=rN | |
| 144. |
One greenhouse gas contributes 14% to total global warming and another contributes 6%. These are respectively identified as |
| A. | N2O and CO2 |
| B. | CFCs and N2O |
| C. | Methane and CO2 |
| D. | Methane and CFCs |
| Answer» B. CFCs and N2O | |
| 145. |
Which of the following is false? |
| A. | Quantity of biomass in a trophic level at a particular period is called as standing crop |
| B. | The energy content in a trophic level is determined is determined by considering a few individuals of a species in that trophic level. |
| C. | The succession that occurs in newly cooled lava is called primary succession |
| D. | Rate of succession is faster in secondary succession |
| Answer» B. The energy content in a trophic level is determined is determined by considering a few individuals of a species in that trophic level. | |
| 146. |
Many freshwater animals cannot live for long in sea water and vice versa mainly because of the |
| A. | Change in N levels |
| B. | Change in the levels of thermal tolerance |
| C. | Variations in light intensity |
| D. | Osmotic problems |
| Answer» D. Osmotic problems | |
| 147. |
Which of the following regarding ecological pyramids is not correct? |
| A. | In most ecosystems, the pyramid of numbers and biomass are up right |
| B. | In tree dominated ecosystem the pyramid of numbers is inverted |
| C. | The pyramid of energy expresses mainly the rate of food production |
| D. | In deep water ecosystem, the pyramid of biomass is upright |
| Answer» A. In most ecosystems, the pyramid of numbers and biomass are up right | |
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