Challenge Prelims V1.0 – Day 72 – GS Paper (Science and Technology)

1. With reference to the “fast breeder reactor” (FBR), consider the following statements:

1. It generates more nuclear fuels than it consumes.
2. It does not use moderators.
3. It is the second stage of India’s three stage nuclear programme.

How many of the statements given above are correct?

2. With reference to neutrino, consider the following statements:

1. Neutrino is a tiny elementary particle with no charge.
2. Neutrinos are the most abundant particles in the universe.
3. Neutrinos can be produced in the laboratory even though they are naturally occurring.

How many of the statements given above is/are correct?

3. Which of the following is correct with regard to Bose-Einstein condensate?

4. Consider the following statements with reference to thorium:

1. Thorium is far more abundant in nature than uranium.
2. Taken in equal amounts, Thorium can generate more energy compared to natural uranium.

Which of the statements given above is/are correct?

5. With reference to Graphene, consider the following statements:

1. It is a three-dimensional carbon allotrope.
2. It is made up of very tightly bonded carbon atoms organized into a hexagonal lattice.
3. It has very high electrical conductivity

How many of the statements given above is/are correct?

6. Which of the following rays or radiations are used in thermal imaging?

7. Consider the following statements:

1. Both Graphene and Fullerene are allotropes of Carbon.
2. Fullerenes are excellent conductors of electricity whereas Graphenes exhibit poor conductivity.

Which of the statements given above is/are correct?

8. Which of the following are the potential applications of lasers?

1. It is used to measure the distance between two celestial bodies.
2. It provides information on continental drifting.
3. It detects and measures the pollutants in vehicular exhaust gases.
4. It is used in the barcode scanners.

Select the correct answer using the code given below.

9. ‘Boson’ has been quite frequent in news due to important scientific research. In this context, which of the following statements is/are correct about bosons?

1. They are elementary particles that make up the matter.
2. Electrons and Protons are included in the category of bosons.
3. Every boson has a negligible, but non zero mass.

Select the correct answer using the code given below.

10. Consider the following statements regarding Magnetic Resonance Imaging (MRI):

1. MRI scanning uses X rays in the magnetic field to produce images of body parts.
2. While MRI scanning cannot produce the pictures of bone, Computerized Tomography (CT scan) can produce pictures of bone.
3. Jewelry and other wearable metallic accessories are not allowed during MRI since it interferes with the magnetic field.

How many of the statements given above is/are correct?

11. Consider the following statements regarding the Photoelectric effect:

1. It is a phenomenon where electrons are absorbed when a material is exposed to light.
2. Solar panels utilize the photoelectric effect to convert sunlight into electrical energy.

Which of the statements given above is/are correct?

12. Consider the following statements regarding the Zeeman Effect:

1. It describes the change in frequency or wavelength of a wave in relation to an observer moving relative to the source of the wave.
2. Its principles are used in the working of Magnetic resonance imaging (MRI) scanners.

Which of the statements given above is/are correct?

13. Consider the following statements regarding radiocarbon dating:

1. Radioactive isotope commonly used in radiocarbon dating is C-14.
2. It can measure age of fossils up to 100 million years old.

Which of the statements given above is/are correct?

14. Which of the following statements regarding Carbon Nanotubes (CNTs) is not correct?

15. Isotones of an element have