CAPF Answerkey 2015: Economy & Science Answerkey with explanation- Shift towards 11-12 Sci.NCERTs

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  1. Observations: Science portion (16 Qs)
    1. Physics (1)
    2. Chemistry (12)
    3. Biology (3)
  2. Observations: Economy Portion (8 Qs)
    1. Economy: BoP (1)
    2. Economy: Finance (2)
    3. Economy: Infra. & Govt (3)
    4. Economy: Historic trend (2)

Observations: Science portion (16 Qs)

CAPF Answerkey Economy & Chemistry

A CAPF aspirant can afford to “play” with Aag, Paani & Rajanbhai, because no questions asked from Banking sector

  • Out of 16, only 2 from current affairs- in Physics and Chemistry each.
  • 3/4th of the science questions from Chemistry only- that too requiring grip over trivial GK about various chemicals.
  • Nearly 40% of the MCQs required deep reading of Class 11-12 Science NCERTs.
  • Hardly 2-3 could be solved from class 7-10 NCERT and Lucent GK.
  • So gradually for all 3 exams (CDS, CAPF, Civil service), the UPSC examiner shifting from class 7-10 towards Class11-12 Science NCERTs.

Physics (1)

73. In January 2015, Government of India approved the establishment of a Neutrino Observatory at :

  1. Bodi hills in Tamil Nadu
  2. Kaina hills in Manipur
  3. Jampui hills in Tripura
  4. Nallamala hills in Andhra Pradesh

Mrunal’s Sci-Tech collection: INO is being built at  Bodi west hills, Theni district, South Tamilnadu

Chemistry (12)

20. Consider following statements

Statement I : Catalytic hydrogenation is highest when the catalyst remains in the powdered form

Statement II : When a catalyst is in the powdered form, its surface area becomes highest

Answer choices

  1. Both the statements are individually true and Statement II is the correct explanation of Statement I
  2. Both the statements are individually true but Statement II is NOT the correct explanation of Statement I
  3. Statement I is true but Statement II is false
  4. Statement I is false but Statement II is true

Reference – Page 127 class  12 chemistry ncert (part 1) Heterogeneous catalysis & 5.3 Intex Question in same page. So Answer should be A

21. Which one of the following statements regarding baking powder is NOT correct ?

  1. It is a mixture
  2. It forms bubbles in a wet mixture
  3. It can be used instead of using yeast
  4. It does not contain sodium bicarbonate

Explantion- Page 31 of class 10 Science NCERT .It says chemical name of baking soda is sodium hydrogencarbonate NaHCo3 . This NaHCo3 is also called as sodium bicarbonate. So statement d is wrong. Correct answer is D.

26. Match List-I with List-II and select the correct answer using the code given below the Lists :

List-I (Compound) List-II (Colour)
A.Urea 1.Blue
B.Hydrous copper sulphate 2.White
C.Lead sulphide 3.Pinkish purple
D.Potassium permanganate 4.Black

Answer choices:

Code A B C D
(a) 2 1 4 3
(b) 2 4 1 3
(c) 3 4 1 2
(d) 3 1 4 2

Reference –

http://www.britannica.com/science/urea

NCERT Class 12 Part 1, Chapter 7 Page no 170, Table 8.8 of Page 222, and page 226 .

27.The radius of a hydrogen atom is 10-10 m. Number of hydrogen atoms to have a length of one nanometer is:

  1. 6.023 * 10^-23
  2. 10
  3. 5
  4. 100

Explanation-

2*10 ^-10 meter is the diameter of one hydrogen atom

So 1 meter is the  diameter of (1/2* 10^-10) hydrogen atoms

So 10^-9 meter will have the diameter  of = (1/ 2*10^-10) *10^-9 = (1/2)10^10*10^-9= 5

So answer is C.

38. Which one of the following statements is correct ?

  1. Iron sulphate and copper sulphate crystals have same number of water of crystallization
  2. Iron sulphate and zinc sulphate crystals have same number of water of crystallization
  3. Zinc sulphate and copper sulphate crystals have same number of water of crystallization
  4. Iron sulphate, copper sulphate and zinc sulphate crystals each have same number of water of crystallization

NCERT Class 10 Science, Page 32

Water of crystallisation is the fixed number of water molecules present in one formula unit of a salt.

Copper sulphate CuSO4.5H2O has 5 water molecules in one unit of salt, says same NCERT page. and we can see in the chemical formula, it has 5 H2O
Zinc sulphate (ZnSO4.7H2O) from formula, it has 7 number of water of crystallization.
Iron sulphate (FeSO4.7H2O) from formula, it has 7 number of water of crystallization. this google book confirms

That means Zinc and Iron sulphate have same no. of water of crystallization, therefore B is the correct answer.

81. The hydrogen atoms present in acetylene molecule are:

  1. acidic
  2. basic
  3. both acidic and basic
  4. neutral

This google book says “Due to this hydrogen atom, acetylene is acidic in nature”. Hence answer “A”

82. Which one of the following compounds is NOT considered an acid ?

  1. BF3
  2. A1C13
  3. NH3
  4. C6H2OH

Reference- Page 172 class 12 chemistry ncert (part 1) , example 7.4

86. Movement of outer electrons in the inner orbits of an atom produces :

  1. alpha-ray
  2. beta-ray
  3. y-ray
  4. x-ray

This google book says X-ray produced by this movement (although I’m not very sure if interpretation is right.) so for the moment, answer is “X-ray”

87. y-ray consists of :

  1. meson particles
  2. neutrino particles
  3. Higg’s boson
  4. electromagnetic waves

Reference – Page 270 Physics class 12th NCERT (Part 1)

88.    The heaviest element known up till January 2015 has the atomic number :

  1. 117
  2. 118
  3. 119
  4. 120

Googled the news for 31st December 2014 to 31st January 2015. found nothing substantial. but from news reports of 2014.
Britannica says 118 (ununoctium)
96. Heavy water of an atomic reactor is :

  1. deionised water
  2. an oxide of heavier isotope of oxygen
  3. a mixture of ice and water
  4. an oxide of heavier isotope of hydrogen

Explanation-  Page 52 Science NCERT class 9 Or Page 286 NCERT chemistry 11, Part 2  Deuterium is the isotopes  of hydrogen and heavy water is D2O

97. In a radioactive decay of a nucleus, an electron is also emitted. This may happen due to the fact that :

  1. electrons are present inside a nucleus
  2. an electron is created at the time of conversion of a neutron into proton
  3. an electron is created at the time of conversion of a proton into a neutron
  4. electrons need to be emitted for conservation of momentum

This google book says: radioactive decay in which an electron is ejected from the nucleus to convert a neutron into a proton, is called “Beta emission”. so Answer “B”. NCERT Class 12 Physics chapter 13 nuclei suggest similar.

Biology

32. Match List-I with List-II and select the correct answer using the code given below the Lists :

List-I (Element) List-II (Application)
A.Isotope of Uranium 1.Treatment of Cancer
B.Isotope of Cobalt 2.Treatment of goiter
C.Isotope of Iodine 3.Treatment of secondary cancer
D.Isotope of Radium 4.Nuclear fuel

Answer choices:

Code A B C D
(a) 3 2 1 4
(b) 4 2 1 3
(c) 4 1 2 3
(d) 3 1 2 4
  • Reference- Page 503 of Lucent (3rd line) , so cobalt isotope is used for treatment of cancer So, B1.
  •  Page 464 Lucent – Fissionable fuel U235 /239 is used so A4.
  • A4B1, by elimination, we are left with answer “C”

33. Hemocyanin is an oxygen-transport metalloprotein present in some invertebrate animals. This protein contains:

  1. one copper atom
  2. two copper atoms
  3. one iron atom
  4. one magnesium atom

There are two copper atoms per molecule of hemocyanin says this google book, hence answer “B”. But who has time to prepare such minute detail *Bang head*.

39. Match List I with List II and select the correct answer using the code given below the Lists :

List-I (Scientist) List-II (Area of study)
A. J.D. Watson 1. Microbiology
B.Louis Pasteur 2. Taxonomy
C.Carl Linnaeus 3. Molecular Biology
D.Charles Darwin 4. Evolution

Answer choices:

Code A B C D
(a) 4 2 1 3
(b) 4 1 2 3
(c) 3 1 2 4
(d) 3 2 1 4

Reference – britannica #1, britannica #2,  britannica #3, Class 8 NCERT Science Page 20, Charles Darwin- Page 149 Class 10th NCERT Science. So answer should be C.

Observations: Economy Portion (8 Qs)

  • As such Economy was never the major area in either CAPF or CDS. Their focus tend to be on Geography, History, Polity, Person in news (which is now replaced with “Defense”)
  • Budget, taxation, Balance of Payment – focus on GK/trivial factoids
  • Modi Government Scheme salient features – 2 MCQs asked.
  • Continuation of the trend of asking about assertion-reasoning type “historic” details of India’s economic development.
  • Nothing from Microeconomics.

Economy: BoP (1)

54. The present cap (as on 01.01.2015) on Foreign Direct Investment in the defence sector is :

  1. 26%
  2. 49%
  3. 74%
  4. 100%

October 2014: India liberalized its defense and insurance sectors, raising foreign investment caps in both to 49%. Afterwards no further increase reported. So, Answer “B”

Economy: Finance (2)

3. Under Section 10(26) of the Income Tax Act, which of the following category of people are exempted from income tax?

  1. Members of the Scheduled Tribes in Chhattisgarh
  2. Members of the Scheduled Tribes and the Scheduled Castes in Special Category States
  3. Members from the Economically Backward Class in All States
  4. Members of the Scheduled Tribes in States of Manipur, Mizoram, Nagaland and Tripura

Hindu Novemer 2014 The tribals of five North-eastern states – Tripura, Manipur, Mizoram, Nagaland and Arunachal Pradesh – are fully exempted from tax under Section 10 (26) of the Income Tax Act, 1961. So “D” most appropriate among the given.

5. Which one of the following statements with regard to the Union Budget of India for the year 2015-2016 is NOT correct?

  1. India Financial Code to be introduced soon in the Parliament
  2. Allocation in defence sector is kept unchanged at around 5 % of GDP
  3. A Student Financial Aid Authority will be instituted
  4. No change in the rate of personal income tax.

Hindustan Times says India’s defence budget has slipped to 1.74% of its gross domestic product (GDP), compared to 1.78% last year. Therefore, “B” is the answer.

Economy: Infra. & Govt (3)

12. Which one of the following statements with regard to the Saansad Adarsh Gram Yojana is NOT correct?

  1. It was launched in the year 2014 on the birth anniversary of Lal Babadur Shastri
  2. Members of the Parliament will adopt villages to create model villages
  3. District Magistrates will act as coordinators
  4. A Rajya Sabha MP has to choose a Gram Panchayat in the State from which he or she was elected

Indianexpress gives Modi speech ““On 11th October, the birth anniversary of Jaya Prakash Narayanji, I will present a complete blueprint of Saansad Adarsh Gram Yojana before all members of Parliament and state governments.” Therefore, “A” is the answer.

13. Which one of the following statements with regard to the ‘Make in India’ initiative of the Government of India is NOT correct?

  1. In order to guide the foreign investors, a body named ‘Invest India’ has been created
  2. The Government has identified key sectors with potential to attract investment
  3. The initiative also aims to identify selected domestic companies having leadership in innovation and new technology for turning them into global champion.
  4. The programme is being implemented by the Ministry of Finance

PIB report: Frost and Sullivan, USA presented the 2015 Asia – Pacific Economic Development Innovation: Policy and Program Implementation Excellence Award in Manufacturing to Department of Industrial Policy and Promotion (DIPP) for the Make in India initiative.

That means DIPP under Commerce ministry implementing it. Hence “D” is the answer.

68. Border Roads Organization (BRO) is under the administrative control of the:

  1. Ministry of Defence
  2. Ministry of Road Transport and Highways
  3. Prime Minister’s Office
  4. Indian Army

India yearbook 2015, Page 826: Ministry of road and highways is carrying out development and maintenance of national highways through 3 agencies (1) NHAI (2) PWD (3) BRO. So, answer “B”

Economy: Historic trend (2)

103. Consider following statements

Statement I: India’s share of world manufacturing output steadily declined during the 19th and the 20th centuries.

Statement II: There was no absolute decline in production in India during the colonial rule.

Answer choices:

  1. Both the statements are individually true and Statement II is the correct explanation of Statement I
  2. Both the statements are individually true but Statement II is NOT the correct explanation of Statement I
  3. Statement I is true but Statement II is false
  4. Statement I is false but Statement II is true

Unable to pinpoint exact statistical source. But, as per this google book says II is wrong, I is right so option “C”.

106. Which of the following statements with regard to construction of railways in colonial India by the British companies is /are NOT true?

  1. The companies were guaranteed a return of 5 per cent on their investment by Government of India
  2. The railways were to be managed mainly by the Government
  3. There was no system of preferential freight charges
  4. The companies were to get the land free from the Government

Select the correct answer using the code given below:

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

Bibek Debroy interim report on railways, page 113- statement 1 is right. By elimination, we get the answer “A”.

Mrunal recommends

67 Comments on “CAPF Answerkey 2015: Economy & Science Answerkey with explanation- Shift towards 11-12 Sci.NCERTs”

  1. Mrunal bhai super. . Remaining aptitude part jaldi post kardo . . we are waiting for that ha. . .

  2. Dear Mrunal Sir,
    Want to know if you will come up anytime soon with economic survey compiled notes (theoretically like last year)?
    Kindly reply. Thank you

  3. Upsc preliminary exam prepation?

  4. ans.86 beta rays

  5. Q68 – Answer is A
    “BRO being a part and parcel of MoD but it is placed under Ministry of Road Transport and Highways for budgetary allocation only as a matter of high policy otherwise MoD has administrative control over BRO.”
    Source : wikipedia

  6. NaHCO3 is a compound but baking powder is not . Baking powder is a mixture of NaHCO3 and a weak acid like tartaric acid .
    Source – X standard NCERT , Acids and Bases chapter .

  7. upsc change pattern of question s every year.

  8. upsc change pattern of question s every year.so last option is reading reading and reading.

  9. Please can anyone suggest me best video tutorials and website for upsc exam to avoid time waste

  10. Sir
    I am getting 109 marks in first paper of capf ac 2015 .Would I be able to meet cut off marks ?Any prediction.

  11. In ncert book of class12 it is clearly written that BRO is under MoRTH

    1. now the administrstive control of bro is in under mod……by this budget

  12. Bro is not under MORTH . it is under MOD –
    NHAI is under Morth.
    I know it as i am working in Morth as IES ( engg services).

  13. Sir Q- 106 is asking for wrong ? Plz clear my doubt.

  14. sir plz post d answer keys of remaining aptitude qstns…

  15. But mrunal Sir hasnt Posted the logical reasoning Part answer Key yet.where did you find the rest of the answers? i also looked into someother answer keys but found them to be totally unreliable.and Sorry, i can’t predict the cutoff. last year it was 115 for general category. But back then, Vacancies were half of what it is now. i had checked Out last year’s QP and found it simpler. So don’t lose hope.all the best!

  16. Hi dear civil aspirent
    I wwanna main s material
    If u hv any links studymaterial Plz send me

  17. can anyone predict the cutoff i am getting around 125-130. should i start preparation for PET or not.

  18. Answer of question 106 regarding railway.
    The answer is C (only 4) according to book “आधुनिक भारत का इतिहास by vipin Chandra” page 86 & 87.

  19. 106 answer should be D

  20. 10 correct out of 16 question in Science section. Questions are really tricky and need detailed study of Chemistry XI and XII.

  21. 106. Which of the following statements with regard to construction of railways in colonial India by the British companies is /are NOT true?

    1.The companies were guaranteed a return of 5 per cent on their investment by Government of India
    2.The railways were to be managed mainly by the Government
    3.There was no system of preferential freight charges
    4.The companies were to get the land free from the Government

    The Question ask NOT TRUE…
    1 is true, option A is wrong.
    2 is true, as from the same page number of Report 113, Point 6.1 says it was first controlled by military boards and then by Engineering Dept of Railway under then GOI.

    So By Elimination, Option C is Correct.

  22. IN ABOVE Q.68 Border Roads Organization (BRO) is under the administrative control of the: Ministry of Defence

  23. My children needed a form several days ago and were made aware of a company that hosts a lot of sample forms . If people need it too , here’s My children needed a form several days ago and were made aware of a company that hosts a lot of sample forms . If people need it too , here’s

  24. i score 267 and obc cut off is 274, is any chance in reserve list

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