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IAS Previous Year Science & Tech Questions | Lecture 6| Nuclear Energy & Sub Atomic Particles Part-2

Q.1) The known forces of nature can be divided into four classes, viz., gravity, electromagnetism, weak nuclear force and strong nuclear force. With reference to them, which one of the following statements is not correct?

(a) Gravity is the strongest of the four

(b) Electromagnetism acts only on particles with an electric charge

(c) Weak nuclear force causes radioactivity

(d) Strong nuclear force holds protons and neutrons inside the nucleus of an atom

Q.2) The alpha particle carries two positive charge. Its mass is very nearly equal to that of

(a) two protons

(b) an atom of helium

(c) sum of masses of two positrons and two neutrons

(d) two positrons as each positron carries a single positive charge

Q.3) India-based Neutrino Observatory is included by the Planning Commission as a mega science project under the 11th Five-Year Plan. In this context, consider the following statements: 

  1. Neutrinos are chargeless elementary particles that travel close to the speed of light.
  2. Neutrinos are created, in nuclear reactions of beta decay.
  3. Neutrinos have a negligible, but non-zero mass
  4. Trillions of Neutrinos pass through human body every second.

Which of the statements given above are correct?

(a) 1 and 3 only

(b) 1, 2 and 3 only

(c) 2, 3 and 4

(d) 1, 2, 3 and 4

Q.4) Match List I with List II and select the correct answer using the codes given below the lists: 

List-I (Characteristic)   List-II (Particle)

  1. Zero mass                              1. Positron
  2. Fractional charge              2. Neutrino
  3. Fractional spin                    3. Quark
  4. Integral spin                         4. Photon


(a) A-2; B-3; C-1; D-4

(b) A-3; B-2; C-4; D-1

(c) A-2; B-3; C-4; D-1

(d) A-3; B-2; C-1; D-4

Q.5) The efforts to detect the existence of Higgs boson particle have become frequent news in the recent past. What is/are the importance / importance of discovering this particle?

  1. It will enable us to understand as to why elementary particles have mass.
  2. It will enable us in the near future to develop the technology of transferring matter from one point to another without traversing the physical space between them.
  3. It will enable us to create better fuels for nuclear fission.

Select the correct answer using the codes given below.

(a)1 only

(b) 2 and 3 only

(c) 1 and 3 only

(d) 1, 2 and 3

Q.6) In the year 2008, which one of the following conducted a complex scientific experiment in which sub-atomic particles were accelerated to nearly the speed of light? 

(a) European Space Agency

(b) European Organization for Nuclear Research

(c) International Atomic Energy Agency

(d) National Aeronautics and Space administration

To do yourself

Q.7) Consider the following statements : 

  1. Indira Gandhi Centre for Atomic Research uses fast reactor technology
  2. Atomic Minerals Directorate for Research and Exploration is engaged in heavy water production
  3. Indian Rare Earths Limited is engaged in manufacture of Zircon for India’s Nuclear Programme beside other rare earth products

Which of the statements given above are correct?

(a) 1, 2 and 3

(b) 1 and 2

(c) 1 and 3

(d) 2 and 3

To do Yourself

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