CAPF (AC) 2017 (Paper-1) (Question 51-100)

Total Questions: 50

31. Which one of the following pairs of Island and Sea/Ocean is NOT correctly matched?

(a) Cyprus : Mediterranean Sea
(b) Falkland : Atlantic Ocean
(c) Chagos : North Pacific Ocean
(d) Islas Cocos : Indian Ocean

Correct Answer: (c) Chagos : North Pacific Ocean

Solution:The Cyprus Island is located in the Mediterranean Sea. Falkland is located in the Atlantic Ocean. Islas Cocos is located in the Indian Ocean. The Chagos Archipelago or Chagos Islands is a group of seven atolls comprising more than 60 islands in the Indian Ocean.

It is widespread around 500 kilometres south of the Maldives archipelago. According to the census 2014, it has a population of 3000 people. It was home to the Chagossians, a Bourbonnais Creole-speaking people. Therefore, the correct option is (c).

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

List-I (Mineral)	List-II (Mine)
A. Zinc	1. Amjhore
B. Gold	2. Sukinda
C. Chromite	3. Zawar
D. Pyrite	4. Hutti

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

Correct Answer: (c)

Solution:Zinc is one of the oldest zinc mines in the world. It is found in Zawar. It is declared as the National Geological Monument. It is a township created by mining company Hindustan Zinc Limited. Gold is found in Hutti.

It accounts for around 80 per cent of the total production of gold in India. Chromite is found in Sukinda, a town in Jajpur district, Rajasthan. Pyrite is found in Amjhore. Therefore, the correct option is (c).

33. As per Census 2011, which one of the following is the correct descending order of States in India in respect of sex ratio (feamle per thousand of males)?

(a) West Bengal - Madhya Pradesh - Uttarakhand - Jammu and Kashmir
(b) Madhya Pradesh - West Bengal - Jammu and Kashmir - Uttarakhand
(c) Uttarakhand - West Bengal - Madhya Pradesh - Jammu and Kashmir
(d) West Bengal - Uttarakhand - Madhya Pradesh - Jammu and Kashmir

Correct Answer: (c) Uttarakhand - West Bengal - Madhya Pradesh - Jammu and Kashmir

Solution:Acensus is defined as the procedure of systematically calculating, acquiring and recording information about the members of a given population. In 1872, the Census of India was started under the British viceroy Lord Mayo. In 1181, the first complete census was taken. In 2011, it was the 15thCencus of India.

The sex ratio of West Bengal is 950, Madhya Pradesh is 931, Uttrakhand is 963 and Jammu and Kashmir is 889. The correct order is Uttarakhand West Bengal - Madhya Pradesh Jammu and Kashmir. Therefore, the correct option is (c).

34. Liquid water is denser than ice due to

(a) higher surface tension
(b) hydrogen bonding
(c) van der Waals forces
(d) covalent bonding

Correct Answer: (b) hydrogen bonding

Solution:In the presence of inter-molecular hydrogen bonding, ice forms hexagonal three-dimensional crystal lattice in which almost half the space is unoccupied. The density of water is roughly 1 gram per milliliter.

However, it changes with the temperature change. On melting of ice, some of the hydrogen bonds are broken and some of the space is occupied by water molecules. Hence, liquid water is a higher density than ice. Therefore, the correct option is (b).

35. Which one of the following is the chemical name of heavy water?

(a) Hydrogen oxide
(b) Deuterium dioxide
(c) Deuterium oxide
(d) Heavy hydrogen oxide

Correct Answer: (c) Deuterium oxide

Solution:Heavy water (D₂O) is composed of deuterium and therefore is called deuterium oxide. Deutrium is a hydrogen isotope with a mass doubles that of ordinary hydrogen, and oxygen. Its molecular mass is 20.02 grams/mole.

The atomic mass of deuterium is greater than that of protium and hence it has a greater molar mass than regular water. This causes heavy water (D₂O) to have slightly different chemical and physical properties when compared to H₂O. It exists as an odourless liquid at room temperatures. Therefore, the correct option is (c).

36. Who among the following has coined the term 'Quark', the functional particles that make up protons and neutrons in an atomic nucleus?

(a) Richard Feynman
(b) Murray Gell-Mann
(c) Albert Einstein
(d) Niels Bohr

Correct Answer: (b) Murray Gell-Mann

Solution:The term, quarks was coined by the particle pioneer, Murray Gell-Mann in 1968. A quark is a type of elementary particle and a fundamental constituent of matter. Murray was awarded the Nobel Prize in Physics the following year.

He was born on 15 September 1929 in New York City and died at the age of 89. The first two quarks were with different electric charges and scientists named them up and down. Therefore, the correct option is (b).

37. The mass number of an element is NOT charged when it emits

(a) Alpha and Beta radiations only
(b) Alpha and Gamma radiations only
(c) Beta and Gamma radiations only
(d) Alpha, Beta and Gamma radiations

Correct Answer: (c) Beta and Gamma radiations only

Solution:A type of radioactive decay in which a beta particle is emitted from an atomic nucleus while transforming the original nuclide to an isobar of that nuclide is called beta decay. In this process, the atomic number increases by 1 and the mass number remain the same.

A change in mass number is the emission of a Gamma-ray from a nuclear isomer or metastable excited state of an atomic nucleus. The mass number does not change as all the protons and neutrons remain in the nucleus unchanged. Therefore, the correct option is (c).

38. Which one of the following is the smallest number by which 2880 must be divided in order to make it a perfect square?

(a) 3
(b) 4
(c) 5
(d) 6

Correct Answer: (c) 5

Solution:

39. A 3 digit number 4X3 is added to 984 to get a 4 digit number 13Y7. If 13Y7 is divisible by 11, then what is the value of (X+Y)?

(a) 15
(b) 12
(c) 11
(d) 10

Correct Answer: (d) 10

Solution:

40. If all students are boys and all boys are dancers, then which one of the following statements is definitely true?

(a) All dancers are boys
(b) All boys are students
(c) All dancers are students
(d) All students are dancers

Correct Answer: (d) All students are dancers

Solution:

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CAPF (AC) 2017 (Paper-1) (Question 51-100)

31. Which one of the following pairs of Island and Sea/Ocean is NOT correctly matched?

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

33. As per Census 2011, which one of the following is the correct descending order of States in India in respect of sex ratio (feamle per thousand of males)?

34. Liquid water is denser than ice due to

35. Which one of the following is the chemical name of heavy water?

36. Who among the following has coined the term 'Quark', the functional particles that make up protons and neutrons in an atomic nucleus?

37. The mass number of an element is NOT charged when it emits

38. Which one of the following is the smallest number by which 2880 must be divided in order to make it a perfect square?

39. A 3 digit number 4X3 is added to 984 to get a 4 digit number 13Y7. If 13Y7 is divisible by 11, then what is the value of (X+Y)?

40. If all students are boys and all boys are dancers, then which one of the following statements is definitely true?

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