[Answerkey] CSAT 2013 GS: Geography: Physical, Indian, World Geography Questions solved with explanation, reference, all four sets (A,B,C,D)

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  1. Prologue
  2. Geography: Internal breakup
    1. World Geography
    2. Atlas Mountain Ranges
    3. Nomadic herders
  3. Indian geography (6Qs)
    1. Narmada
    2. Mica, Petrol and Gas
    3. Coal, Indian
    4. Agro related (2Q)
      1. Laterite Soil
      2. Crop seasons
    5. Tribals of India
  4. PHYSICAL Geography (5Qs)
    1. Knight and Day
    2. Fresh Water
    3. Thunderstorm
    4. Temperature: Coastal vs Interior
    5. Earth dynamic changes?

Prologue

  • 14 out of 100 MCQs in CSAT 2013 were from Geography. Last year it was 11.
  • Majority of the question can be solved directly from standard reference books/sources for Geography viz.
    • NCERT
    • NIOS
    • General studies Manual
    • Indian Geography by Majid Hussein
  • Within Indian geography, agro related Qs. receive attention, just like last year.
  • Within Physical geography, ocean, temperature related Qs, just like last year.
  • World Geography continues to receive low-priority (Although world geography should not be completely ignored in preparation because Mains 2013 does contain topics from World Geography.)
  • Nothing from current affairs.

Geography: Internal breakup

Chart CSAT 2013 Geography

World2
Indian*6
Physical6
Total14

*Qs related to National parks, wildlife etc. classified under EnB (environment and biodiversity).

World Geography (2Qs)

Atlas Mountain Ranges

1.  Which one of the following pairs is correctly matched?

  1. Abyssinian Plateau : Arabia
  2. Atlas Mountains : North-Western Africa
  3. Guiana Highlands : South-Western Africa
  4. Okavango Basin : Patagonia

In the school atlas, check the physical map of Africa. You’ll see Atlas mountain range in the Top-left corner (=north Western) => Answer B is correct.

Regarding other choices:

  1. Abyssinian plateau is in Ethiopia (in Africa)
  2. Guiana Highland= In South America
  3. Okavango basin/swamp= In Southern part of in Africa.

Hence final answer (B) Atlas Mountains : North-Western Africa.

Nomadic herders

2. “Climate is extreme, rainfall is scanty and the people used to be nomadic herders.” The above statement best describes which of the following regions?

  1. African Savannah
  2. Central Asian Steppe
  3. North American Prairie
  4. Siberian Tundra

let’s consider the options

African Savannah

Doesn’t fit the description of “Climate is extreme, rainfall is scanty”

Siberian Tundra?

  • as per NIOS Geography material, chapter.16 Life In The High Latitudes
  • Extreme climate= yes
  • Low precipitation =yes.
  • Nomadic life = yes
  • but they’re not nomadic “herders”. Their primary occupation is hunting and fishing.

Central Asian Steppe

  • as per NIOS Geography material, chapter.15 Life In The Mid Latitudes
  • extreme climate= yes
  • low precipitation =yes.
  • Nomadic life= yes. The mid-latitude (Central Asian) grassland were once home to pastoral nomads like Kirgiz, Kazakh and Kalmuks.

North American Prairie?

  • as per NIOS Geography material, chapter.15 Life In The Mid Latitudes
  • extreme climate= yes
  • low precipitation =yes.
  • nomadic life? = No. The farmers here use mechanized equipment and do wheat cultivation on large scale.

Hence answer B) Central Asian Steppe

Indian geography (6Qs)

Physical Geography of India (Narmada)1
Minerals and Energy related2
Agro related2
Human Geography (Tribals)1
Total6

Narmada

Q. The Narmada river flows to the west, while most other large peninsular rivers flow to the east. Why?

  1. It occupies a linear rift valley.
  2. It flows between the Vindhyas and the Satpuras.
  3. The land slopes to the west from Central India.

Select the correct answer using the codes given below.

  1. 1 only
  2. 2 and 3
  3. 1 and 3
  4. None
  • Refer to NCERT 11th standard, Geography, 3rd chapter, page number 27. It says Narmada and Tapi flow through rift valleys caused due to the upheaval of Himalayas.
  • Also it is given in the last line of the page as it flows through the rift valley with the Satpura in south and Vindhyas in the north. But there is no option for 1 & 2. We can consider maybe that flowing between the ranges may not cause the river to flow west and it is only a fact.
  • Refer to NCERT Class 9 Contemporary India textbook, chapter 2, page number 10. It gives the contours of the Indian physical systems. We can see that Narmada is flowing through the area where the land is not sloping towards the west from central India, but it is flowing west because of the rift valleys only.

Map Narmada elevation
Hence answer (A) Only 1

Mica, Petrol and Gas

1. Consider the following statements:

  1. Natural gas occurs in the Gondwana beds.
  2. Mica occurs in abundance in Kodarma.
  3. Dharwars are famous for petroleum.

Which of the statements given above is/are correct?

  1. 1 and 2
  2. 2 only
  3. 2 and 3
  4. None

Refer to level 2 Q6 in Pearson’s General Studies Manual (2011), all three statements are directly lifted.
http://books.google.co.in/books?id=WuBFs6yFRwcC&pg=RA2-PA35&lpg=RA2-PA35
And as per Thorpe (author of the Manual) only Mica-Kordema Statement is correct.
http://books.google.co.in/books?id=WuBFs6yFRwcC&pg=RA2-PA55&lpg=RA2-PA35&ots=r3dPt0txsL

StatementT/F?Why?
  1. Natural gas occurs in the Gondwana beds.
False
  • Gondwana beds = coal deposits (and not natural gas.) (Majid)
  1. Mica occurs in abundance in Kodarma.
True
  • TMH General Studies manual, Ch. Indian and World Geography, page 127
  • Kodarma mines in Jharkhand are one of the important mica producing areas
  • Another reference is Indian Geogrpahy, Majid Hussain Page 7.18 The main center of mica production in Jharkhand and Bihar are Kodarma, Dhorhakola.
  1. Dharwars are famous for petroleum.
False
  • Dharwar = district in Karnataka. Not related with petroleum.

Hence answer: (B) only 2.

Coal, Indian

Which of the following is / are the characteristic/ characteristics of Indian coal?

  1. High ash content
  2. Low sulphur content
  3. Low ash fusion temperature

Select the correct answer using the codes given below.

  1. 1 and 2 only
  2. 2 only
  3. 1 and 3 only
  4. 1, 2 and 3

Standard reference books (NCERT, NIOS, TMH, Majid) are silent about low ash fusion temperature of Indian coal, hence time to dig internet.

As per an article published in Frontline (2008),

most significant characteristic of Indian coal is its high ash content1st statement is correct
However, Indian coal’s sulphur content is low, about 0.5 per cent.2nd statement is correct
high ash fusion temperature of about 1,500 C.3rd statement is false

Final answer A: only 1 and 2 correct.

Agro related (2Q)

Laterite Soil

1. Which of the following statements regarding laterite soils of India are correct?

  1. They are generally red in colour.
  2. They are rich in nitrogen and potash.
  3. They are well-developed in Rajasthan and UP.
  4. Tapioca and cashew nuts grow well on these soils.

Select the correct answer using the codes given below.

  1. 1, 2 and 3
  2. 2, 3 and 4
  3. 1 and 4
  4. 2 and 3 only

Indian Geography, Majid Hussain Chapter: Page 6.8

Laterite soils are rich in iron and aluminum but poor in nitrogen, potash, potassium, lime and organic matter. Hence Statement #2 is wrong.  Eliminate all answer choices containing statement #2.

  1. 1, 2 and 3
  2. 2, 3 and 4
  3. 1 and 4
  4. 2 and 3 only

Thus we are left with final answer C: only 1 and 4.

Another approach is via NIOS Geography Chapter 19, Page 401

Laterite soil commonly found in areas of high altitude and heavy rainfall in Karnataka, TN, MP, Bihar, Orissa, Assam and Meghalaya. Hence Rajasthan doesn’t fit the bill. So, Eliminate choice involving Statement#3 and you’re still left with answer C.

Crop seasons

2. Consider the following crops

  1. Cotton
  2. Groundnut
  3. Rice
  4. Wheat

Which of these are Kharif crops?

  1. 1 and 4
  2. 2 and 3 only
  3. 1, 2 and 3
  4. 2, 3 and 4

Refer NCERT Class 12 Geography (India People and Economy), Chapter 5, Page no – 44

KharifRice, cotton, jute, juwar, bajra and tur
RabiWheat, gram, mustard

Hence answer must contain both Cotton (#1) and Rice (#3). And answer must not contain Wheat(#4).

Now start eliminating options

  1. 1 and 4 (because 3 is missing)
  2. 2 and 3 only (because 1 is missing)
  3. 1, 2 and 3
  4. 2, 3 and 4 (because contains 4)

Thus we are left with final answer C: 1, 2 and 3.

Tribals of India

Consider the following pairs :

  1. Limboo (Limbu) : Sikkim
  2. Karbi : Himachal Pradesh
  3. Dongaria : Odisha
  4. Bonda : Tamil Nadu

Which of the above pairs are correctly matched?

  1. 1 and 3 only
  2. 2 and 4 only
  3. 1, 3 and 4 only
  4. 1, 2, 3 and 4

As per the article that appeared in The Hindu in Feb 2012,

Bonda are the most primitive tribal groups in Odisha. According to Census 2011, the Bonda tribe has a population of less than 12,000. Therefore, statement #4 is wrong, because it links Bonda with Tamilnadu. Eliminate answer choices involving #4

  1. 1 and 3 only
  2. 2 and 4 only
  3. 1, 3 and 4 only
  4. 1, 2, 3 and 4

Thus, final answer (A): 1 and 3 only.

PHYSICAL Geography (5Qs)

Knight and Day

Variations in the length of daytime and night time from season to season are due to

  1. the earth’s rotation on its axis
  2. the earth’s revolution round the sun in an elliptical manner
  3. latitudinal position of the place
  4. revolution of the earth on a tilted axis

As per TMH General studies manual, Chapter Indian and World Geography, page 9

had the axis of earth been perfectly perpendicular to the plane of ecliptic, the sunrays would have been verticle over the equator all the year round and amount of energy received at any place would have remained constant throughout the year; hence no change of seasons. Also in that situation, the days and nights all over the earth would have been exactly equal throughout the year as it happens at the time of equinoxes.

Hence answer (D)

Fresh Water

On the planet earth, most of the freshwater exists as ice caps and glaciers. Out of the remaining freshwater, the largest proportion

  1. is found in atmosphere as moisture and clouds
  2. is found in freshwater lakes and rivers
  3. exists as groundwater
  4. exists as soil moisture

Refer to NCERT Class 11 Physical Geography, Ch.13, page 113

ReservoirPercentage of the Total
  1. Oceans
97.25
  1. Ice Caps and Glaciers
2.05
  1. Groundwater
0.68
  1. Lakes
0.01
  1. Soil Moisture
0.005
  1. Atmosphere
0.001
  1. Streams and Rivers
0.0001
  1. Biosphere
0.00004

Hence answer is (C) exists as groundwater.

Thunderstorm

During a thunderstorm, the thunder in the skies is produced by the

  1. meeting of cumulonimbus clouds in the sky
  2. lightning that separates the nimbus clouds
  3. violent upward movement of air and water particles

Select the correct answer using the codes given below.

  1. 1 only
  2. 2 and 3
  3. 1 and 3
  4. None of the above produces the thunder

The question is about cause of thunder during a thunderstorm (and not the cause of thunderstorm itself).

As per Britannica

  • Thunder is the sound caused by a lightning discharge.
  • Lightning heats the air in its path and causes a large over-pressure of the air within its channel.
  • The channel expands supersonically into the surrounding air as a shock wave and creates an acoustic signal that is heard as thunder.

So is the answer D=none of above.

by the way if we take #2 is correct (lightening that separates numbus clouds), there is no option saying “only 2”.=> hence D

Temperature: Coastal vs Interior

The annual range of temperature in the interior of the continents is high as compared to coastal areas. What is / are the reason / reasons?

  1. Thermal difference between land and water.
  2. Variation in altitude between continents and oceans.
  3. Presence of strong winds in the interior
  4. Heavy rains in the interior as compared to coasts.
  1. 1 only
  2. 1 and 2 only
  3. 2 and 3 only
  4. 1, 2, 3 and 4

Debatable. first let’s check the statements that can be validated or rejected with surety:

Statement #1= correct

As per NIOS Geography, Ch5, Page 99

Continentality or distance from sea

  • water is bad conductor of heat. Due to this moderating effect of the sea, places near coast have low range of temperature and high humidity.
  • The places in the interior of continent do not experience moderating effects of sea. These places have extreme temperature. => Statement #1 is correct.
  • This eliminates answer choice C, because it doesn’t contain #1.

Statement #4= wrong

  • Statement 4 claims that Heavy rains in the interior as compared to coasts (are responsible for why annual range of temperature in the interior of the continents is high)
  • But the interiors in Central Asia, receive very poor rainfall due to distance from sea. Annual precipitation is usually low in the interior areas. Hence #4 cannot be generalized.
  • This eliminates choice D, because it contains #4. Thus we are left with two choices A and B.
  1. 1 only
  2. 1 and 2 only

So final answer boils down to whether statement #2 is right or wrong?

Relook at the question: it asks about why “annual range of temperature” is high in interior areas.

ok then, first What is annual range of temperature (ART)?

Ans. It is the difference between mean temperature of the warmest and the coldest months.

  • We know that Shimla and Jalandhar are located @same latitude yet Shimla is cooler than Jalandhar because of difference in altitude. As we move up in the mountains, temperature goes down. but that is to justify difference in ART between two land-places.
  • otherwise, if we look @the map showing ART in Costal vs Interior areas (see the map)

Map India_average_annual_temperature

  • Observe that Western Ghats and Himalayas have lower ART compared to coastal areas in TN and Andhra, Goa and Kerala coast.
  • Therefore, Variation in altitude between continents and oceans= not the valid explanation for given question.

Hence #2 is wrong, answer= (A) only 1. (or debatable (B))
Update Jun-26-2014: UPSC uploaded official answerkey. Correct answer is: A.

Earth dynamic changes?

Consider the following:

  1. Electromagnetic radiation
  2. Geothermal energy
  3. Gravitational force
  4. Plate movements
  5. Rotation of the earth
  6. Revolution of the earth

Which of the above are responsible for bringing dynamic changes on the surface of the earth?

  1. 1, 2, 3 and 4 only
  2. 1, 3, 5 and 6 only
  3. 2, 4, 5 and 6 only
  4. 1, 2, 3, 4, 5 and 6

lolz, Debatable on what exactly is meant by “dynamic” changes on earth surface and how far we drag the logic about factors responsible such dynamic change.

Viewpoint #1: A is correct

  • if you consider the tides that cause coastal erosion =dynamic change on earth’s surface. Then tides occur due to gravitational pull of the Moon=> #3 is right.
  • earthquake =brings dynamic change on earth surface=>#4 plate movements is right.
  • volcanos= brings dynamic change on earth surface=>#2 geothermal energy movements is right.
  • Electromagnetic radiation, rotation, revolution cause seasonal changes
  • Rotation =Responsible for day and night- cannot bring ‘dynamic changes’ to earth’s surface. So #5 is wrong (or implausible).
  • Answer should contain 2,3,4 but not 5. only one such option=A: 1, 2, 3 and 4 only

Viewpoint #2: D is correct

  • revolution of earth = responsible for seasons. And Heavy monsoon => landslides and soil erosion= dynamic change to surface. hence #6 must be in the answer. Therefore viewpoint #1 is wrong when it says #5 is wrong.
  • final answer should be (D)= all six

Viewpoint #3: C is correct

  • Electromagnetic radiation from Sun=> causes rainfall and snow melting=soil erosion=dynamic change to earth’s surface but it is a farfetched argument in terms of cause and effect because you’ve to factor in greenhouse gases, deforestation etc. Same goes for gravitational force, hence 1 and 3 are false, final answer (C) 2, 4, 5 and 6 only.

anyways, final arbitrator is official answerkey of UPSC.
Update Jun-26-2014: UPSC uploaded official answerkey. Correct answer is: D all of them responsible.
Answerkeys for remaining topics, coming soon + thanks Mr. Manu Jha (मनु झा) and Mr.Shiva Ram for providing help.

Mrunal recommends

  1. (free) NCERT, NIOS, TN-Books
  2. Environment by ShankarIAS
  3. Indian Polity M.Laxmikanth (Hindi | English)
  4. Art & Culture by Nitin Singhania (Hindi | English)
  5. Spectrum: Modern History (Hindi | English)
  6. Bipin Chandra: Post Independence
  7. Fast-track to Arithmetic Rajesh Verma
  8. MK Pandey’s Analytical Reasoning
  9. Disha’s Topicwise Paperset (Hindi | English)
  10. School Atlas
  11. Mains: Language papers
  1. (free) NCERT, NIOS, TN-Books 4 History,Geo,Sci
  2. Indian Polity M.Laxmikanth (Hindi | English)
  3. Spectrum: Modern History (Hindi | English)
  4. Maths: Quantam CAT Sarvesh Kumar
  5. Objective General English SP Bakshi
  6. Word Power made Easy -Norman Lowe
  7. Topic wise Solved Paperset by Disha


So far 142 Comments posted

  1. abhisek

    Dear Mrunal,I thanx u so much that I dont get words to show u how elated I am with these helps that u r providing…….We wud be indebted to u if u plz give the recommended books for Civil Services-Mains and strategy thereof at the earliest……..

    Thanx Again

  2. Mohit kumar singh

    thunderstorm :-
    http://micro.magnet.fsu.edu/electromag/java/lightning/
    http://cosmiac.ece.unm.edu/index.php/Thundercloud

    This may not be considered as a trustful source but as if now i can’t locate any other,but as per my memory of class 12 physics is concerned i am sure that Cloud act as `natural capacitor and when two clouds i.e. two natural capacitor come in contact ,some energy is transferred from one to another and some energy is lost in form of light energy and sound energy(as energy cannot be destroyed, only transferred from one form to another ) i.e. Thunderstorm . so mrunal bhai plz correct me if i am wrong.

  3. pradeep pendyala

    Dear mrunal..plz consider this justification.
    Thunder is the sound caused by lightning.
    Lightning discharges may occur between areas of cloud without contacting the ground. When it occurs between two separate clouds it is known as inter-cloud lightning.

    so 1 and 2 are possible answers
    but nimbus clouds are of 2 types nimbostratus n cumulonimbus.
    Nimbostratus, unlike cumulonimbus, is not associated with thunderstorms.- source wikipedia, pg 96 ncert 11th physical
    so thunder occurs when cumulonimbus meet.

    so i think ans 1 is correct.

  4. rohini

    is it true that upsc 1st check 1st paper and if we go through cut off then only check 2nd paper (csat)….taking abt pre…?

    1. Mrunal

      they combine marks of both papers and then prepare the result.

      1. physical geography

        2 questions of physical geography .
        viz
        1. the most important fishing ground of the world are found in the reasons where…
        2. which of the following is/are the unique characteristic of equatorial forest?
        please reply the same

        1. NEHA VASUDEVA

          the most important fishing ground of the world are found in the reasons where…

          answer-option(C) where warm and cold oceanic current meets because this leads the growth of Plankton – food for fish,results in more no. of fishes.

          NEWFOUNDLAND on eastern coast of North America is one of the major fishing centers of the world.

  5. KK

    I have a question regarding award of marks….if a ‘debatable’ question indeed has more than one option correct (lets say A & C), will UPSC give marks if one has marked either A or C, or will they choose any one of the options to be correct (lets say A)and provide negative for option C.
    If anybody can please comment on this. Thanks.

  6. Anbu

    Thank you Mrunalji

  7. aman

    kindly refer to ‘FUNDAMENTALS OF PHYSICAL GEOGRAPHY’ class 11th NCERT , i quote from page 96,

    “Thunderstorms and Tornadoes
    Other severe local storms are thunderstorms
    and tornadoes. They are of short duration,
    occurring over a small area but are violent.
    Thunderstorms are caused by intense
    convection on moist hot days. A thunderstorm
    is a well-grown cumulonimbus cloud
    producing thunder and lightening. When the
    clouds extend to heights where sub-zero
    temperature prevails, hails are formed and they
    come down as hailstorm. If there is insufficient
    moisture, a thunderstorm can generate duststorms. A thunderstorm is characterised by
    intense updraft of rising warm air, which
    causes the clouds to grow bigger and rise to
    greater height.”

    sir shount the option be 1 only in this question…..

  8. Ruchin Mehra

    For Night and day question please refer IGNOU ENB 2nd chapter it says revolution of earth around sun in elliptical manner as QUestion ask seasonal not daily as due to rotation . hence answer could be B also acc. to IGNOU .

  9. chandu

    Thank you very much.

  10. Praveen

    Sir,
    In the “dynamic changes question” the rotation of earth (statement 5) is responsible for Coriolis Effect which helps in the formation of cyclones. Cyclones rarely form along the equator due to the weak Coriolis effect present in this region.

    1. neeraj

      i would like to share one thing regarding dynamic changes on earth q
      venus has revolution but no season reason no tilt in axis that`s why it think neither rotation nor revolution should be included and a should be the ans

  11. Anand

    Thanx mrunal,
    Can you please tell what will be cut-off for prelims this year

  12. Hussain

    Variation in the duration of day and night from season to season is due to the latitudinal position of the place… NCERT Class 9, Chapter 1.. He asks a question that why is the duration btw day and night hardly felt in Kerala and highly felt in J&K??
    And moreover at poles, sunlight is there throughout the day and night for 6 months and not there for the remaining 6 months…

    1. vikki

      evn I think the same. even WIKIPEDIA’s first line mentions about LATITUDE as a general reason for the variation. in any case earth does not revolves around its axis so option D is outrightly ruled out !!!! rotation is nyways not the reason for variation, hence LATITUDE seems to be most appropriate…

  13. Manoj

    there are some answers which dont match with PD… Although both(Mrunal and PD) are reliabe,then which one should be followed…..

  14. Navin

    as per NIOS Geography material, chapter.16 Life In The High Latitudes but NIOS website is showing chapter 16 as India physical features.. am i refering to correct link or there is any other link?? please reply

  15. nishikant

    regarding natural gas in gondwana beds…its given in the Economic survey book in chap 11 (energy) that shale gas formations are spread over sedimentary basins such as cambay,Gondwana,kg and cauvery…and i think this shld be the official answer of upsc as it is frm official book of goi..

  16. k2

    What is annual range of temperature (ART)?
    Ans. It is the difference between mean temperature of the warmest and the coldest months.

    —>>it is quite correct as in northern hemisphere warmest(JuLY) and coldest (January)!!
    but I THINK you missed
    AVERAGE ANNUAL TEMPERATURE RANGE(AATR) =SUM TOTAL OF MEAN TEMPERATURES OF EACH MONTH IN A YEAR/12

    THE MAP WHICH YOU DISPLAYED IS REFERRING AATR hence your explanation is wrong as it is no concerns with AAR.

    Mr. mrunal i wish that you should analyze the definitions thoroughly i.e. “ANNUAL RANGE OF TEMPERATURE & average annual temperature range”.

    REFER THE LAST TABLE OF ncert class IX ON PAGE 41.

    *********variation in ALTITUDE IS NOT A FACTOR contributing to annual range of temperature after considering data given for KOLKATA,LEH,chennai,thiruvananthapuram,delhi.(altitude,jan & july temp difference)

    $$$—leh is a part of HIMALAYAS HAVING HIGH ART!!
    KINDLY CORRECT YOUR LINE OF THOUGHT—“Observe that Western Ghats and Himalayas have lower ART compared to coastal areas in TN and Andhra, Goa and Kerala coast.”

    HOWEVER YOU ANSWERED IT CORRECTLY BASED ON YOUR MAP.HOW????

    so it is not debatable at all as far as i think ART depends on
    1.distance from sea(continentality)
    2.latitude
    3.OCEAN CURRENT(IF WINDS FROM SEA ARE DIRECTED TOWARDS LAND)
    4.mountaion or relief “aspect”(example on west coast of north america NEVEDA–WHICH BLOCKS WINDS TO ENTER IN LAND FURTHER)

  17. RAJ

    sir,
    you are simply best. i appreciate the amount of hard work which you have put in compiling
    and explaining each question (even wrong option for more clarification). may god fulfil your all wishes.

    warm regards,
    Raj

  18. nav

    thunderstrom questions explanation is given in 7th class ncert of science and tech..it is due to lightning. .so mrunal is right…

  19. nav

    thunderstrom questions explanation is given in 7th class ncert of science and tech..it is due to lightning. .so mrunal is right…..

  20. shahan

    During a thunderstorm, the thunder in the skies is produced by the

    meeting of cumulonimbus clouds in the sky
    lightning that separates the nimbus clouds
    violent upward movement of air and water particles

    Select the correct answer using the codes given below.

    1 only
    2 and 3
    1 and 3
    None of the above produces the thunder
    i think answer for this is option c because most of the place where i searched solution for this question say answer is Option C
    kindly please acknowledged the correct answer

    1. Prabal

      Yes the correct answer is c 🙂

  21. DHARMENDRA KUMAR NIGAM

    this is the best effort of you

  22. Make It Simple

    Question of Mica, Petroleum and Gas. This question could have been very easy to answer if the candidate would have learned Indian Geology Time Scale (or the first chapter of Gepgraphy of India by Majid Hussain which is usually skipped or lightly taken). Petroleum in Dharwar system – Wrong because presence of fossils was available only from Mesozoic Era (Gondwana system), so petroleum will not available in the previous period.

  23. tannu

    answer of second questn is option D i.e. siberian tundra.

  24. Nimisha Srivastava

    @Neeraj: Just because Venus doesn’t have seasons doesn’t mean Earth doesn’t experience changes due to rotation and revolution! You could argue that even day and night cause ‘dynamic’ changes on the Earth’s surface – the melting of snow on mounatains on a hot sunny day could be a ‘dynamic’ change as well! And the rotation of the earth also creates a centrifugal force which impacts tides.

  25. Gabriela

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  26. Sherri

    I am really thankful to the owner of this web site who has shared this impressive article at at this place.

  27. rahul

    dharwar
    The North-Western Region
    This belt extends along Aravali in Rajasthan and
    part of Gujarat and minerals are associated with
    Dharwar system of rocks. Copper, zinc have
    been major minerals. Rajasthan is rich in
    building stones i.e. sandstone, granite, marble.
    Gypsum and Fuller’s earth deposits are also
    extensive. Dolomite and limestone provide raw
    materials for cement industry. Gujarat is known for its petroleum deposits. -(ncert)

  28. sunaina

    Why leh is colder than thiruvananthpuram?

    Why dehradun and shimla are colder?

  29. Prabal

    Thnqu sooo much….!!

  30. Ms giri

    The tides are formed attracting force on the earth from sun and moon.

  31. Neeraj Singh Mahthaan

    Sir,fact is more important or concept for upsc preliminary exam??

  32. avinah dongardive

    Select with the help of the codes given below, the components of Green Revolution :
    1. High yielding variety seeds
    2. Irrigation
    3. Rural Electrification
    4. Rural roads and marketing
    Codes :
    (A) 1 and 2 only
    (B) 1, 2 and 3 only
    (C) 1, 2 and 4 only
    (D) All the four , ” this question some difficult please give explain sir

  33. Jay Chakra

    Dear Sir,

    I am religiously following your blog and youtube channel. There is a discrepancy in both. In the question “Variations in the length of daytime and night time from season to season are due to” the youtube video as well as the Disha publication (21 years CSAT GS IAS) which you refer says the answer should be (b) whereas according to this blog or GC Leong the answer should be (d). Please clarify the doubt. Are we missing some points in the question or the answer provided by UPSC is wrong.

    Thanks.
    Waiting for some clarification.

    1. Jay Chakra

      Got clarification by scanning the comments on youtube.
      Thanks for producing such a wonderful series of videos.

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