Previous year MCQs

General science UPPSC 1997 GS-I
Question

Assertion (A): The atmosphere receives most of the heat only indirectly from the sun and directly from the earth's surface.
Reason (R): The conversion from shortwave solar to long-wave terrestrial energy takes place at the earth's surface.

Code:

Answer & Solution

Answer: (Detailed Solution Below)

Option A: Both A and R are true and R is the correct explanation of A

Detailed Solution:

The correct answer is “Both A and R are true and R is the correct explanation of A”.
While the atmosphere does receive some heat directly from the sun, the majority of its heating comes from the earth's surface after it absorbs solar radiation and re-emits it as infrared radiation.

Solar energy reaches the earth as shortwave radiation. The earth absorbs this energy and re-emits it as longwave (infrared) radiation, which heats the atmosphere.

Similar Questions:

Who among the trio-Lal, Bal and Pal became President of the Indian National Congress?
  1. A) Lala Lajpat Rai
  2. B) Bal Gangadhar Tilak
  3. C) Bipin Chandra Pal
  4. D) None of them
Assertion (A): Detergents easily remove oil and dirt from soiled garments.
Reason (R): Detergents increase the surface tension of water.
  1. A) Both A and R are true and R is the correct explanation of A
  2. B) Both A and R are true but R is not the correct explanation of A
  3. C) A is true but R is false
  4. D) A is false but R is true
Match list-I and list-II and select the correct answer from the code given below?
List-I - List-II

A. August Declaration - 1. Lord Linlithgow
B. August Offer - 2. Montague
C. August Resolution - 3. Mohammad Ali Jinnah
D. Direct Action Day - 4. Mahatma Gandhi

Code:
A B C D
  1. A) 2 1 4 3
  2. B) 3 4 1 2
  3. C) 1 3 2 4
  4. D) 4 2 3 1
Genome mapping relates to:
  1. A) blood grouping
  2. B) mapping of genes
  3. C) mapping of nerve centers
  4. D) mapping of brain
Thermodynamically the most stable form of carbon is
  1. A) Coal
  2. B) Fullerenes
  3. C) Graphite
  4. D) Diamond
Assertion (A): In recent times, the growth in the public sector employment has been very sluggish in India.
Reason (R): There has been reassessment of the role of State in economic development.
  1. A) Both A and R are true and R is the correct explanation of A
  2. B) Both A and R are true but R is not the correct explanation of A
  3. C) A is true but R is false
  4. D) A is false but R is true
Which is the smallest gland in human body?
  1. A) Adrenal
  2. B) Thyroid
  3. C) Pancreas
  4. D) Pineal
Accumulation of which one of the following in the muscles leads to fatigue?
  1. A) Lactic acid
  2. B) Benzoic acid
  3. C) Pyruvic acid
  4. D) Uric acid
CAPART is associated with:
  1. A) Computer hardware
  2. B) Consultancy to increase export
  3. C) Controlling pollution in large industries
  4. D) Helping and evaluating rural welfare Scheme
Which one of the following causes acid rain:
  1. A) Carbon monoxide
  2. B) Carbon dioxide
  3. C) Ozone
  4. D) Nitrogen oxide
Devasthal is in the news because of:
  1. A) finding relics of ancient civilisation
  2. B) nstallation of the largest telescope in Asia
  3. C) plan to develop a large herbal garden
  4. D) renovation of an ancient shrine
Which one of the following statements is not true for a person suffering from hypermetropia?
  1. A) The person can see far objects distinctly.
  2. B) The focal length of the lens is large.
  3. C) The image of the close objects is focussed behind the retina.
  4. D) A concave lens is used to correct this defect.