Previous year MCQs

UPPSC 2012 GS-1 General science
Question

The reason of mirage is

Answer & Solution

Answer: (Detailed Solution Below)

Option D: Total internal reflection of light

Detailed Solution:

The correct answer is “Total internal reflection of light”.
Mirages are caused by total internal reflection of light when it passes from cold air (denser) to hot air (rarer).

Similar Questions:

What is the tenure of the Chief Election Commissioner of India?
  1. A) Five Years
  2. B) During the pleasure of the President
  3. C) Six years or till the age of 65 years whichever is earlier
  4. D) Five Years or till the age of 65 years whichever is earlier
The year 2011 has been marked for the livestock disease named
  1. A) Foot mouth disease
  2. B) Rinderpest
  3. C) Rabies
  4. D) Cowpox
The correct sequence of the following countries in terms of area in descending order is:
  1. A) Brazil, Argentina, Australia, India
  2. B) Brazil, Australia, India, Argentina
  3. C) Argentina, India, Australia, Brazil
  4. D) India, Brazil, Argentina, Australia
The Ozone layer in the atmosphere:
  1. A) Causes rainfall
  2. B) Creates pollution
  3. C) Protects life on earth from ultraviolet radiation
  4. D) Produces oxygen in the atmosphere
Which one of the following is used as the coolant in the "Fast Breeder Test Reactor" at Kalpakkam?
  1. A) Carbon dioxide
  2. B) Heavy water
  3. C) Sea water
  4. D) Molten sodium
Double-helical structure of DNA was given by whom ?
  1. A) Jacob and Monod
  2. B) Watson and Crick
  3. C) H.G. Khorana
  4. D) None of the above
The gas used in artificial ripening of unripe fruit is
  1. A) Acetylene
  2. B) Ethane
  3. C) Hydrogen
  4. D) Carbon dioxide
Wilhelm Rontgen invented
  1. A) Radio
  2. B) X-Ray Machine
  3. C) Electric Bulb
  4. D) Electric Motor
The cause of sweetness in the milk is because of the presence of:
  1. A) Micros
  2. B) Lactose
  3. C) Sucrose
  4. D) Carotin
Which one of the following is NOT correctly matched?(Substance) (Use)
  1. A) Silver bromide - Artificial photosynthesis
  2. B) Silver iodide - Artificial rain
  3. C) Lithium bicarbonate - Treatment of rheumatism
  4. D) Milk of magnesia - Antacid
A sample of any of the following substances disappears after sometime when exposed to air like camphor, naphthalene or dry ice. This phenomenon is called:
  1. A) Sublimation
  2. B) Evaporation
  3. C) Diffusion
  4. D) Radiation
Which one of the following hormones stimulates pancreas for the production of digestive juice?
  1. A) Rennin
  2. B) Trypsin
  3. C) Secretin
  4. D) Pepsin