Previous year MCQs

General science UPPSC 2018 GS-I
Question

Ultra-violet radiation from sun light causes the reaction that produce which of the following?

Answer & Solution

Answer: (Detailed Solution Below)

Option C: O3

Detailed Solution:

The correct answer is “O3”.
Ozone is formed when oxygen molecules (O2) interact with ultraviolet (UV) radiation from the sun. This process is known as photolysis. The UV radiation breaks the oxygen molecules into oxygen atoms, which then combine with other oxygen molecules to form ozone (O3).

Similar Questions:

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
Cholestrol is
  1. A) an insecticide
  2. B) a vitamin
  3. C) a steroid
  4. D) an enzyme
It is difficult to walk on ice than on road because:
  1. A) Ice is harder than road
  2. B) Road is harder than ice
  3. C) Ice does not offer any reaction when we push it with our foot
  4. D) Ice has a lesser friction than road
Cyclotrons are used to accelerate?
  1. A) Neutrons
  2. B) Protons
  3. C) Atoms
  4. D) Ions
In which of the following ecosystems the species diversity is relatively higher?
  1. A) Deep Sea
  2. B) Tropical rain forest
  3. C) Coral reefs
  4. D) Desert
Consider the following statements:

1. Scientific investigation depends on commitment to practical ideals.
2 Honesty is particularly important in science.

Select the correct answer from the codes given below:
  1. A) Both statements 1 and 2 are correct
  2. B) Both statements 1 and 2 are incorrect
  3. C) Statement 1 is correct, 2 is not correct
  4. D) Statement 1 is correct, 2 is unpredictable
Consider the following statement about haemoglobin and select the correct answer from the code given below:

1. It contains iron.
2. It imparts red colour to the blood.
3. It provides immunity against certain diseases.
4. It is a career of oxygen in the blood.

Code:
  1. A) 1, 2 and 3
  2. B) 2, 3 and 4
  3. C) 1, 3 and 4
  4. D) 1, 2 and 4
Botulism is:
  1. A) Food borne infection
  2. B) Food-borne intoxication
  3. C) Water-borne infection
  4. D) Water-borne intoxication
Which of the following air pollution gets dissolve in haemoglobin of the blood more rapidly than oxygen?
  1. A) PAN
  2. B) Carbon dioxide
  3. C) Carbon monoxide
  4. D) Ozone
The electric wire used in the fuse has the characteristic features of:
  1. A) Low resistance/High melting point
  2. B) Low resistance/Low melting point
  3. C) High resistance/Low melting point
  4. D) High resistance/High melting point
Consider the following statements about haemoglobin:

1) It carries oxygen in the blood.
2) It is iron containing compound.
3) It provides immunity against certain disease.
4) It imparts red colour to the blood.

The correct statements out of these are:
  1. A) 1,2 and 3
  2. B) 2, 3 and 4
  3. C) 1, 3 and 4
  4. D) 1, 2 and 4
A colour-blind man marries a normal woman. The features of colour blindness will appear in his:
  1. A) sons
  2. B) daughters
  3. C) sons's sons
  4. D) daughter's sons