Previous year MCQs

General science UPPSC 2017 GS-I
Question

Which one of the following atmospheric change takes place due to the greenhouse effect?

Answer & Solution

Answer: (Detailed Solution Below)

Option A: Increase in carbon dioxide concentration in the atmosphere

Detailed Solution:

The correct answer is “Increase in carbon dioxide concentration in the atmosphere”.
The greenhouse effect is caused by the accumulation of greenhouse gases, such as carbon dioxide (CO₂), methane (CH₄), and nitrous oxide (N₂O), in the atmosphere. These gases trap heat, leading to an increase in Earth's average temperature.

Similar Questions:

Which of the following us used in the treatment of blood cancer?
  1. A) lodine-131
  2. B) Sodium-24
  3. C) Phosphorus-32
  4. D) Cobalt-60
"Threat of global warming" is increasing due to increasing concentration of
  1. A) Ozone
  2. B) Nitrous oxide
  3. C) Sulphur dioxide
  4. D) Carbon dioxide
The smallest unit of length is
  1. A) micron
  2. B) nanometre
  3. C) angstrom
  4. D) fermi-metre
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
Sound waves do not travel in:
  1. A) Solids
  2. B) Liquids
  3. C) Gases
  4. D) Vacuum
Which one of the following is not a collective privilege of the members of Parliament?
  1. A) Freedom of debates and proceedings
  2. B) The Right to regulate the internal matters of the Parliament
  3. C) Freedom from attendance as Witness
  4. D) The privilege of excluding strangers from the house
Which of the following is the correct order of plant species from higher to lower order?
  1. A) Class — Phylum — Order — Plant Kingdom
  2. B) Order — Class — Phylum — Plant Kingdom
  3. C) Class — Plant Kingdom — Phylum — Order
  4. D) Plant Kingdom—Phylum — Class — Order
In an earthen pitcher, the water remains cold due to the process of
  1. A) condensation
  2. B) evaporation
  3. C) sublimation
  4. D) none of the above
Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R).

Assertion (A): CO2, SO2 and NO2 gases get dissolved in rain water and produce acid rain.
Reason (R): Atmospheric air is polluted due to high concentration of gases like carbon dioxide, sulphur dioxide and oxides of nitrogen.

Select the correct answer from the codes given below:
  1. A) Both (A) and (R) are true and (R) is the correct explanation of (A).
  2. B) (A) is false, but (R) is true.
  3. C) Both (A) and (R) are true, but (R) is not the correct explanation of (A).
  4. D) (A) is true, but (R) is false.
The stones present in the gall bladder affect the digestion of:
  1. A) Protein
  2. B) Carbohydrate
  3. C) Fat
  4. D) Nucleic acid
Match the columns with Lists-I and II and select the correct answer with the help of code given below:
List-I - List-II

A. High Velocity - 1. Mach
B. Wavelength - 2. Angstrom
C. Pressure - 3. Pascal
D. Energy - 4. Joule
Code:

A B C D
  1. A) 2 1 3 4
  2. B) 1 2 4 3
  3. C) 1 2 3 4
  4. D) 2 1 4 3
The reason of mirage is
  1. A) Interference of light
  2. B) Diffraction of light
  3. C) Polarisation of light
  4. D) Total internal reflection of light