????????? – ????????????? ????????, ??????? ??????? & ????? ?????? ???? ????!!
Q.1) �Sea Smoke� is common in
a) Equatorial region
b) Desert region
c) Atlantic ocean
d) Arctic region
�????????�????????? ????? ??????????????
a) �???????????? ?????
b) ?????? ????????
c)??????????? ??????
d) ??????? ?????
Solution: �Arctic sea smoke is sea smoke forming over small patches of open water in sea ice.� ????????? ???? ???? ?????? ???? ??????? ?????? ?????? ????? ????????????? ????????? ???? ????
Q.2) Where was the first nuclear reactor of Asia established?
a) People�s Republic of China b) Japan
c) Taiwan d) India
???? ?????????? ???????? ?????? ????? ??????????????
a) ??????????????????? b)???????
c)?????? d) ???????
Solution: India’s and Asia’s first nuclear reactor was the Apsara research reactor at Mumbai
Q.3) The production of Phyto-Plankton is reduced due to
a) The burning of Hydrocarbon b) Deforestation
c) Depletion of ozone layer
d) Climatic change
???????????????? ???????? ?????????????
a) ?????? ?????????? ????????
b) ????????? ?????
c) ???????? ???????
d) ?????? ?????????????
Solution: It has been estimated that a 16% ozone depletion could result in a 5% loss in phytoplankton16% ????? ????????? ??????????????????? 5% ?????? ????????????? ????? ????????????????????
Q.4) Pink noise is related to
a) Climate change b) Air pollution
c) Water pollution d) Land pollution
??????????? ?????? ?????? ?????????????
a) ??????? ?????? b) ?????? ????????
c) ???? ???????? d)??? ????????
Solution: Climate change, also called global warming, refers to the rise in average surface temperatures on Earth.The principal sources of pink noise in electronic devices are almost invariably the slow fluctuations of properties of the condensed-matter materials of the devices.
???? ??????????? ??????? ????????????? ??????? ???????, ???????? ?????? ?????????? ????????????? ???????? ???????????. ??????? ??????????? ??????????? ?????????? ??????? ????????? ??????????? ??????? ??????????? ??????????? ??????????? ?????????? ??????? ???? ?????????? ?????
Q.5) What is the Meaning of Free Cycle?
a) A Cycle Given as Free
b) A Ride Given as Free in a Cycle
c) Give Away Something That Are Used and Unwanted as Opposed To Selling
d) None of These
�Free Cycle� ??????? ???????
a) ???? ?????????
b) ???? ????????????? ?????????
c) ???? ???????? ?????? ????????? ???? ????????? ?????????
d) ????????? ??????? ?????
Solution: To freecycle means to repurpose something rather than throw it away. The purpose of free cycling is to recycle things that have been previously used by giving them away to other people for free. This concept has assisted in waste reduction.
????????????? ??????? ???????? ?????? ?????? ??? ??????????? ???????????. ??????????????????? ???????, ?????? ???????????????? ????????? ?????????????? ????????? ???????? ?????????? ???????????. ???? ??????? ???????? ??????? ???????
Q.6) The largest atomic Research centre of India
a) Variable energy cyclotron centre
b) Centre for Advanced technology
c) Indira Gandhicentre for Atomic Research
d) Bhabha atomic research centre
??????????? ?????????? ??? ????????? ?????
a) ????????????? ???????????? ?????
b) ???????? ???????????????????? ?????
c) ??????? ?????? ??? ????????? ?????
d) ???? ??? ????????? ?????
Solution: The Bhabha Atomic Research Centre (BARC) is India’s premier nuclear research facility, headquartered in Trombay, Mumbai, Maharashtra.
???? ??? ????????? ????? (??????) ??????????? ?????????? ??? ????????? ???????????, ??? ??????????????? ?????? ?????????? ????????????? ???????????
Q.7) Excess of fluoride in drinking water causes:
a) Lung disease b) Intestinal infection
c) Fluorosis d) None of the above
?????????? ???? ???? ???????? __________? ???????????????.
a) ????????? ???? b) ????? ?????????
c) ??????????
d) ???????? ??????? ?????
Solution: Fluorosis is a cosmetic condition that affects the teeth. It’s caused by overexposure to fluoride during the first eight years of life.
??????????? ?????? ?????? ?????????? ??? ???? ????. ??? ???????????? ????? ????? ?????????? ??????????????? ??????? ?????????????? ???????????.
Q.8) The Hydrochlorofluorocarbons (HCFC) are the compounds which have the following molecules:
a) Hydrogen b) Carbon
c) Chlorine d)Fluorine
?????? ?????? ?????? ??????? (HCFC) ???????????? ????????? ?????????? ????????? ????
a) ???????? b) ???????
c) ???????? d) ????????
Solution:
Ozone molecules got destroyed when the chlorine and bromine atoms come into contact with ozone in the atmospheric layer of stratosphere. CFC (Chlorofluoro carbon) slowly moves upward to the stratosphere and are broken up by ultraviolet radiation, which releases chlorine atoms.
??????? ??????????? ???????? ????????? ???????? ??????? ???????? ???????? ???????? ??????? ???????????? ????? ???????????? ?????????????. ??.????.?? (????????????? ???????) ??????? ??????? ????????????? ?????????? ???????? ??? ??? ????????????? ????????????????, ??? ???????? ???????? ?????????????.
Q.9)Ozone hole is present over
a) Equator region b) Antarctic region
c) arctic region d) tropic region
????? ???? ??????????????? ???????
a) ????????????????????? b) ????????????? ?????
c) ????????? ????? d) ????????????
Solution: An �ozone hole� appeared over Antarctica when ozone depleting substances are present throughout the stratosphere.
??????????????? ????? ?????????????? ????????? ??????? ??????????? ????????????? ??? �????? ????� ?????????
Q.10) Which of the following is a disadvantage of renewable energy?
a) High pollution
b) Available only in few places
c) High running cost
d) Unreliable supply
???????????????? ????????????????? ???????? ???? ????
a) ???? ????????
b) ??? ????????? ??????? ??????????
c) ???? ???????? ?????
d) ??????????? ???????
Solution:
Energy- abundant, versatile, reliable, portable, and affordable, fossil fuels provide over 80 percent of the worlds energy because they are superior to the current alternatives, Disadvantage of most of the renewable energy sources is its unreliable supply. But to renewable energy resources from wind, solar, and biomass, man can control access to and conversion of the energy held in fossil fuels. Any machine or person can’t control when the wind blows or at what velocity. No one can control how much of the radiant heat of the sun will hit the earth on a given day or hour
??????- ???????, ???????, ????????, ????? ??????? ?????, ???????? ???????????? ?????? ???????? 80 ??????????????? ????????? ????????????, ??????? ??? ???????? ????????? ??? ?????????, ????????????????? ???????? ??????????? ???? ???? ??????????? ???????. ????? ??????, ????? ??????? ??????????????????? ????????????????? ???????? ???????????, ???????? ?????????????? ???? ?????? ???????????? ????????????? ???????? ????????????? ????????. ?????? ?????????? ?????? ???? ????????? ???? ????????? ?????? ???? ????????????? ????????. ??? ??????????? ?????? ?????? ??? ??? ????????? ????????? ????????? ??????? ?????? ??????? ???????? ?????? ???????? ????????????? ????????
Q.11) Photochemical smog normally does not contain
a) Chlorofluorocarbons b) Peroxyacetyl nitrate
c) Ozone d) Acrolein
???????? ????????? ???? ??????? ??? ???????????
a) ???????????????????????
b) ???????????????? ????????
c) ????? d) ?????????
Solution: Photochemical smog is a mixture of air pollutants which have been chemically altered into further noxious compounds by exposure to sunlight. The main components of photochemical smog are nitrogen oxides, Volatile Organic Compounds (VOCs), tropospheric ozone, and PAN (peroxyacetyl nitrate).
??? ????????? ??????????? ?????? ?????? ???????????????? ??????????, ??? ????? ????? ????????????????? ????? ????????? ??????? ?????? ?????? ???????????? ??????????? ????????????????. ??? ????????? ??????????????? ??????? ??????? ???????? ??????????, ????????? ????????? ??????? (VOC ???), ?????????????? ????? ??????? ???? (???????????????? ????????) ?????.
Q.12) Depletion of the ozone layer is caused due to
a) Ferrocene b) Fullerenes
c) Freons d) Polyhalogens
????? ????????? ?????? ???? ??????? ????????????
a) ????????? b) ??????????
c) ??????????? d) ?????????????
Solution:
Freons are basically chlorofluorocarbons. Due to their stability, it has a long lifespan in the atmosphere. When it reaches the ozone layer in upper strata of the atmosphere, it reacts with ozone molecules in presence of UV radiations and converts into stable oxygen molecules as a product. Hence, it depletes ozone layer by reacting with them.
??????????? ???????????? ???????????????????????. ???????? ??????????? ???????, ??? ?????????????? ????? ?????????? ???????. ??? ?????????????? ???? ???????????? ???? ????? ??????? ??????? ????, ??? ??? ??? ????????????? ???????????? ????? ??????????????? ???????????? ??????? ???????? ????????????? ??? ??????? ?????????. ????, ????? ??????? ????????? ???????????? ????? ??? ???????????.
Q.13) Find the secondary pollutant among these
???????? ???????? ???? ???????????? ???????????
a) PAN b) N2O
c) SO2 d) CO2
Solution:
The photochemical smog has the chief constituent of the peroxy-acetyl nitrate (PAN) that are secondary pollutants as they formed by the primary pollutants. These are formed when the hydrocarbon radicals react with the oxygen in the presence of the sunlight. It forms a brown-coloured haze. This also results in the formation of the ground-level ozone.
??? ????????? ??????????? ????????-??????? ???????????? (????) ??????? ?????????? ???????????, ??? ??????? ???????????????? ????????????? ???????? ???? ?????????????????. ????????????? ???????????? ????? ??????? ???????????? ??????????? ???????????? ???? ??? ???????????. ??? ??????? ??? ???????? ??????????????. ??? ??????? ????? ????????????? ???????????.
Q.14) Which statement is wrong?
a) The amount of ozone layer is greater in the region close to the equator
b) ozone acts as filter for UV radiations
c) in the equatorial region it acts as pollutant
d) CFCs play effective role in removing O3 in the stratosphere
???? ??????? ?????
a) ???????? ???????? ?????????? ????????? ????? ????????? ???? ??????? ??????
b) ????? ??? ??? ??????????????????? ??????????? ?????????????
c) ???????? ???? ????????? ??? ?????????????? ?????????????
d) ??? ??????????? O3 ? ??????????? CFC ??? ??????? ??????? ??????????
Solution:
Total ozone at any location on the globe is defined as the sum of all the ozone in the atmosphere directly above that location.
?????? ???? ?????????? ????? ????? ??????. ?????????????? ???? ??????? ?????????? ??????????????? ???? ?????????? ???? ???????? ???????????????????.
Q.15) Which one of the following is not a functional unit of an ecosystem?
a) Productivity b) Stratification
c) Energy flow d) Decomposition
???????????????? ??? ????????????? ????????? ??????????? ???? ?????
a) ??????????????? b) ?????????????????
c) ?????? ?????? d) ??????
Solution:
Stratification is formation of different layers of strata. It is a functional unit of forests. Many forests consist of 3 strata, namely a layer of tree, a layer of shrubs and a layer of herbaceous plants. Ecosystem consists of living and nonliving things. Productivity is the rate of generation of biomass in an ecosystem. Decomposition is the process of breakdown of dead organic material. The upper layer of soil is the site for decomposition in the ecosystem. In an ecosystem, energy flow from producers to consumers to decomposers and then back to the environment.
??????? ?????? ???????????? ???????? ?????????? ????????????. ??? ????????? ??????????? ????. ?? ??????? 3 ???????????? ??????????, ?????? ???????? ??? ???????, ?????????? ??????? ??????? ????????? ??????????? ???????. ????????????? ??????? ?????? ???????? ??????? ??????? ??????????? ???????????. ??????????????? ?????? ??? ????????????? ????????? ???????? ??????????? ?????????. ?????? ?????? ????? ?????? ??????????? ???????? ???????????????. ??????? ???? ??????? ????????????? ????????? ??????????? ????????. ??? ????????????? ?????????, ????????????????????????? ????????????? ????????????????? ?????? ?????? ??????? ??????????????????? ??????????
Q.16) Which one of the following is not a gaseous biogeochemical cycle in ecosystem?
a) Nitrogen cycle b) Carbon cycle
c) Sulphur cycle d) Phosphorus cycle
???????????????? ??? ????????????? ????????? ??? ???? ????? ????????? ??????? ?????
a) ???????? ??????? b) ??????? ???????
c) ????? ??????? d) ???????? ???????
Solution: The term biogeochemical cycle is used for exchange or circulation of biogenetic nutrients between living and nonliving components of the biosphere.
In gaseous cycles of matter, the materials involved in circulation between biotic and abiotic components of the biosphere are gases or vapours and the reservoir pool is atmosphere or hydrosphere e.g., carbon, hydrogen, oxygen, nitrogen etc.
In sedimentary cycles of matter, the materials involved in circulation between biotic and abiotic components of the biosphere are non-gaseous and the reservoir pool is lithosphere e.g., phosphorous, calcium, magnesium etc. Sulphur has both sedimentary and gaseous phases. Gaseous cycles are rapid and more perfect as compared to sedimentary cycles
????? ????????? ??????? ???? ???? ???????????????? ???????? ??????? ??????? ??????????? ??????? ????????? ?????????????????? ?????????? ?????? ?????????????? ????????????????????.
???????? ???? ????????????, ???????????????? ???????? ??????? ????????? ??????????? ??????? ???????????? ????????? ????????? ????????? ?????? ????????? ??????? ????????????? ????? ?????????? ?????? ????????????? ?.??., ???????, ????????, ????????, ???????? ???????.
???????? ?????? ????????????, ???????????????? ???????? ??????? ????????? ??????????? ??????? ???????????? ????????? ????????? ???? ???????? ??????? ????????????? ????? ????????????? ?.??., ????????, ?????????, ??????????? ???????. ????????????? ?????? ??????? ???? ????????? ?????. ?????? ????????????? ????????????? ???? ?????????? ????????? ??????? ????????
Q.17) Which of the following is the most abundant Green House Gas (GHG) in the earth�s atmosphere?
a) Nitrogen Dioxide b) Carbon Dioxide
c) Water Vapour d) Sulphur Dioxide
???????????????? ???????? ?????????????? ???? ?????? ???? ????? ???? ???? (GHG) ????
a) ???????? ?? ??????? b) ??????? ?? ???????
c) ???? ?????? d) ?????? ?? ???????
Solution:
Water vapor is the most abundant greenhouse gas in the atmosphere. The increase in water vapor concentrations may be the result of climate feedbacks that are related to the warming of the atmosphere.
???? ?????? ?????????????? ???? ?????? ???? ????? ???? ???? ?????. ???? ?????? ??????????? ?????????? ?????????????? ??????????????? ?????????? ??????? ???????????????? ??????? ??????????.
Q.18) Which of the following is mainly responsible for the causes of water pollution?
a) Afforestation b) Oil refineries
c) Paper factories d) Both b and c
???? ??????????????? ????????????? ???????????????? ??? ?????????????
a) ???? ????????
b) ??????? ????????????? ??????????
c) ????? ?????????????
d) b ??????? c ????????
Solution: Oil refineries, paper factories, textile and sugar mills, chemical factories are responsible for water pollution.These industries discharge harmful chemicals into revers and streams, and pollute water.
??????? ????????????? ??????????, ????? ?????????????, ????? ??????? ???????? ??????, ????? ????????????? ???? ?????????????? ????????????. ???? ????????? ?????? ???????????? ??????????? ??????? ??????? ??????????? ??????????, ??????? ?????????????????.
Q.19) Negative soil pollution is
a) Reduction in soil productivity due to erosion and overuse
b) Reduction in soil productivity due to addition of pesticides and industrial wastes
c) Converting fertile land into harden land by dumping ash, sludge and garbage
d) None of the above
???????? ??? ???????? ??????
a) ??????? ??????? ???????????? ???????? ??????? ??????? ??????????????? ???????
b) ????????????????? ??????? ?????????? ???????? ???????? ??????? ????????????????? ?????????
c) ???????, ???? ??????? ????????? ?????????? ????? ????? ??????? ???? ?????? ?????????
d) ????????? ??????? ?????
Solution: Soil pollution greatly due to use of large amount of herbicides, pesticides. There also some more reason of soil pollution like industrial wastes are dumped into fertile soil which get polluted and also not having proper satiation. But soil erosion is not responsible for soil pollution, soil erosion is mainly due to deforestation
???? ???? ??????????????, ??????????????????? ???????????????? ??? ???????? ????????. ?????????? ???????? ????? ??? ?????????????? ??????? ??? ????????? ????? ??????? ????????????????, ??? ?????????????, ?????? ?????? ?????? ?????. ????? ??? ??????? ??? ?????????????? ????????, ??? ??????? ?????????? ????????? ??????????
Q.20) The layer of atmosphere between 10km to 50km above the sea level is called as
a) Troposphere b) Thermosphere
c) Stratosphere d) Mesosphere
???? ???????????????? 10 ??.?? ????? 50 ??.?? ??? ?????????????? ??????? ______ ?? ????????????????
a) ????????????? b) ????? ??????????
c) ?????????? d) ??? ???????
Solution: The layer of atmosphere between 10 km to 50 km above sea level is called as the stratosphere.
???? ???????????????? 10 ??.?? ????? 50 ??.?? ??? ?????????????? ??????? ??????? ???????? ????????????????.
Q.21) Air pollution that occurs in sunlight is
a) Reducing smog b) Acid rain
c) Oxidizing smog d) Fog
????? ??????? ???????? ?????? ???????? ??????
a) ???? ????????? b) ???? ???
c) ??????????? ???? d) ???????
Solution:
Photochemical smog occur in warm (sunlight) and has high concentration of oxidising agent therefore it is called photochemical smog/oxidising smog.
??? ????????? ??????????? ????? (????? ???????) ?????????? ??????? ??????????? ???????? ???? ?????? ???????, ???? ??? ??? ????????? ???? / ??????????? ???? ????? ????????????????.
Q.22) Right to Clean Water is a fundamental right, under the Indian Constitution
a) Article 12 b) Article 21
c) Article 31 d) Article 41
???????? ?????????? ??????? ?????? ???? ???????? ????? ??? ?????? ?????????????? ???? ???????? ?????????????
a) ?????? 12 b) ?????? 21
c) ?????? 31 d) ?????? 41
Solution: In India, the Right to water has been protected as a fundamental human right by the Indian Supreme Court as part of the Right to Life guaranteed under Article 21 of the Indian constitution.
???????????, ?????? ?????????????? 21 ??? ???????? ???? ?????????? ???????????? ???????? ?????????? ??? ???????? ?????? ?????????????????? ???? ????? ??? ???????? ???? ???????? ?????????????????????.
Q.23) With which of the following, the Agenda 21� of Rio Summit, 1992 is related to?
a) Sustainable development
b) Combating the consequences of population
c) Mitigation norms of Green House Gases (GHGs) emission.
d) Technology transfer mechanism to developing countries for �clean-energy� production.
1992 ??? ????? ???? ????? ?????????? ???????????? 21 ??????? ???????????? ?
a) ??????? ????????
b) ?????????? ??????????????? ???????? ????????? ????????? ?????????
c) ????? ??????????????? ???????????? ?????????? ???????????
d) ???????? ??????????? ?????? ??????????? ?????????????? ????????????
Solution:
Agenda 21 is a comprehensive plan of action to be taken globally, nationally and locally by organizations of the United Nations System, Governments, and Major Groups in every area in which human impacts on the environment.
Q.24) Which among the following awards instituted by the Government of India for individuals or communities from rural areas that have shown extraordinary courage and dedication in protecting Wildlife?
a) Indira Gandhi Paryavaran Puraskar
b) Medini Puruskar Yojana
c) Amrita Devi Bishnoi Award
d) Pitambar Pant National Award
????????? ???????????? ??????? ??????? ??????? ???????????? ????? ?????????? ???????????????? ????? ?????????? ?????? ????????????? ?????? ????????????? ???????????? ?????? ????
a) ????????????? ??????? ????????
b) ?????? ???????? ?????
c) ??????? ???? ?????? ??????
d) ???????? ????? ????? ??????
Solution:
This award is given for significant contribution in the field of wildlife protection, which is recognised as having shown exemplary courage or having done exemplary work for the protection of wildlife. A cash award of Rupees One lakh is presented to individuals/institutions involved in wildlife protection.
????????? ???????????? ???????? ??????????????? ??????????????? ???? ?????? ???????????????, ??? ????????????? ??????????? ?????????? ?????? ?????????????? ??????????????? ????????????? ???????? ???????? ???????????????????????. ????????? ???????????? ??????????? ?????????? / ??????????????? ??? ?????? ?????? ???????????? ???????????????
Q.25) The �thickness� of Stratospheric Ozone layer is measured in/on:
a) Sieverts units b) Dobson units
c) Melson units d) Beaufort Scale
???????????? ??????? ?????? ????? ??????????
a) ????????? ???? b) ???????? ????
c) ??????? ???? d) ???????? ????????
Solution:
The ozone layer was discovered in 1913 by the French physicists Charles Fabry and Henri Buisson. Its properties were explored in detail by the British meteorologist G. M. B. Dobson, who developed a simple spectrophotometer (the Dobsonmeter) that could be used to measure stratospheric ozone from the ground. Between 1928 and 1958 Dobson established a worldwide network of ozone monitoring stations, which continue to operate to this day. The �Dobson unit�, a convenient measure of the columnar density of ozone overhead, is named in his honour.
????? ??????? 1913 ??? ???????? ???????????????? ??????? ??????? ??????? ?????? ??????? ????????? ????????????????????. ???? ???????? ?????????? ?????? ???????? ??. ???. ??. ??????? ??????? ???????????, ???? ??? ???? ???????????????????????? (???????????????) ?????????????, ??? ??????? ??????? ??????? ????? ????? ????? ????????????. 1928 ??????? 1958 ???? ??????? ??????? ???????? ????? ??????????? ???????????? ?????????? ??????????, ??? ???????? ????????? ????????????. ????? ????????????? ????????? ???????????? ??????? ???????????? �??????? ??????� ????? ??????? ??????????????.
Q.26) As per 2017 statistics, the highest per capita emitter of Carbon dioxide in the world is
a) USA b) China
c) Qatar d) Saudi Arabia
2017??? ??????? ?????? ????????? ??? ?????? ???????-??-??????? ??? ??????? ?????????? ???? ????
a) ????????? b) ????
c) ??????? d) ????? ???????
Solution:
Q.27) The use of microorganism metabolism to remove pollutants such as oil spills in the water bodies is known as
a) Biomagnification b) Bioremediation
c) Biomethanation d) Bioreduction
???? ????????? ???? ??????? ???????? ????? ??????????? ????? ??????????????? ???????? ??????????? ????????????? ????
a) ?????? ??????????????
b) ???????? ??????
c) ?????? ?????????????
d) ?????? ?????????
Solution: Bioremediation is the process of using microorganisms to remove the environmental pollutants such as cleaning up of contaminated soil, oil spills etc.
????????? ????? ??????? ???????, ??????? ???????? ????? ????????????? ??????????? ????? ??????????????? ?????????????????? ??????????? ??????????????.
Q.28) The Ozone Day is observed every year on September 16 as on this day in 1987 the ___________was signed for launching efforts to arrest the depletion of the fragile ozone layer in the stratosphere that prevents the harmful ultra-violet rays of the sun from reaching the earth. Fill the correct word in blank.
a) Montreal Protocol b) Geneva Protocol
c) Kyoto Protocol d)Nagoya Protocol
??????????????? ???????? ????? ?????? ??????? ??? ????? ???????? ????????? ????????????????? ????????? ???? ????? ????????? ???????? ?????? ___________ ??????????? 1989??? ????? ???????????????????. ???? ???????????? ??????? ??????? ?????????? 16 ??? ???? ????? ?????? ???????????????????.
a) ??????????? ???????????
b) ?????? ???????????
c) ???????? ???????????
d) ????? ???????????
Solution: The Montreal Protocol on Substances that Deplete the Ozone Layer was an international treaty which was organized in 1987. The UN General Assembly celebrate 16th September in memory of the date in 1987 when nations inked the Montreal Protocol.
????? ??????? ?????????? ??????????? ?????????? ???????? 1987 ??? ??????? ??????????? ??? ??????? ?????????????. ?.?? ?????? ??? 1987 ??? ????? ????????? ??????? ?????????? 16 ??? ???? ???????????????.
Q.29) Which among the following always decreases in a Food chain across tropic levels?
a) Number
b) Accumulated chemicals
c) Energy d) Force
???????????????? ??? ?????????????????? ???? ??????? ???????????? ????????? ????????????
a) ????????? b) ????????????
c) ?????? d) ????
Solution:
The Pyramid of Energy is always upright.� ???????? ??????? ????????? ?????????? ????????
Q.30) In the E-waste generated by the Mobile Phones, which among the following metal is most abundant?
a) Copper b) Silver
c) Palladium d) Gold
??????????? ????? ????????? ????????? ?????????? ???? ?????? ????????? ??????????????
a) ??????? b) ??????
c) ???????? d) ??????
Solution:
The sources of e-waste are faulty desktop computers, cables, printers, refrigerators, air conditioners, televisions, electronic and electrical devices. E-waste generated by the Mobile Phones are copper, silver, gold, palladium. Among them copper is found abundantly.
?-?????????? ????????? ????? ?????????? ????????, ?????????, ??????????????, ?????????? ?????????, ??? ????????????, ???????????????, ??????? ??????? ???? ?????????. ?????? ????????????? ??????????????? ???? ???????? ???????, ??????, ??????, ??????????. ???????? ??????? ????????? ?????????????.
Answers:
| 1 | D | 11 | A | 21 | C |
| 2 | D | 12 | C | 22 | B |
| 3 | C | 13 | A | 23 | B |
| 4 | A | 14 | A | 24 | C |
| 5 | C | 15 | B | 25 | B |
| 6 | D | 16 | D | 26 | B |
| 7 | C | 17 | C | 27 | B |
| 8 | C | 18 | D | 28 | A |
| 9 | B | 19 | A | 29 | C |
| 10 | D | 20 | C | 30 | A |
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