Q. 46. Which of the following sequence of epochs from youngest to oldest on a geological time scale is correct?
(a) Pleistocene, Pliocene, Miocene, Oligocene, Eocene
(b) Miocene, Oligocene, Eocene, Pleistocene, Pliocene
(c) Pliocene, Pleistocene, Miocene, Oligocene, Eocene
(d) Eocene, Oligocene, Miocene, Pliocene, Pleistocene
Answer:
Explanation:
Q. 47. Consider the following statement:
1. The farthest distance between moon and earth is called perigee
2. The nearest distance between moon and earth is called apogee
3. The farthest distance between sun and earth is called perihelion
4. The nearest distance between sun and earth is called aphelion
5. The position of sun, moon and earth in a straight line is called Syzygy
Which statements given above is/are correct?
(a) 1 and 2 only
(b) 1, 2, 3 and 4 only
(c) 5 only
(d) 3, 4 and 5 only
Answer:
Explanation:
Q. 48. Which of the given arrangements of electromagnetic radiations based on their wavelength in ascending order is correct?
(a) Infrared, Visible light, Ultraviolet light, X-rays, Gamma rays
(b) Gamma rays, X-rays, Ultraviolet light, Visible Light, Infrared
(c) X-rays, Gamma rays, Ultraviolet light, Visible light, Infrared
(d) Visible, Gamma rays, X-rays, Ultraviolet light, Infrared light
Answer:
Explanation:
Q. 49. With reference to Quantum Mechanics, which of the following best describes the Uncertainty Principle?
(a) It is impossible to measure the temperature of a subatomic particle accurately.
(b) One cannot simultaneously know both the exact position and momentum of a particle.
(c) The act of observing a particle changes its physical state permanently.
(d) Particles can exist in two different locations at the exact same time.
Answer:
Explanation:
Q. 50. Which of the following fuels is primarily used in the core of India’s Prototype Fast Breeder Reactor (PFBR)?
(a) Natural Uranium
(b) Thorium-232
(c) Mixed Oxide (MOX) Fuel
(d) Enriched Uranium
Answer:
Explanation: