Previous year MCQs

General science UPPSC 2013 GS-I
Question

Which one of the following gases is used for the purification of drinking water?

Answer & Solution

Answer: (Detailed Solution Below)

Option B: Chlorine

Detailed Solution:

The correct answer is “Chlorine”.
Chlorine is a strong oxidizing disinfectant that has been used for more than 60 years to treat drinking water supplies. The gas is passed through water to kill bacteria.

Similar Questions:

Neutron was discovered by:
  1. A) Chadwick
  2. B) Rutherford
  3. C) Bohr
  4. D) Newton
Which among the following is a constituent of natural silk?
  1. A) Phosphorus
  2. B) Nitrogen
  3. C) Magnesium
  4. D) Potassium
The members of the Panchayat Samiti are
  1. A) Nominated by the Block Development Officer
  2. B) Nominated by the Zila panchayat Chairman
  3. C) Directly elected by the people
  4. D) Indirectly elected by the members of the Village Panchayat
The brain is responsible for
  1. A) thinking
  2. B) regulating the heartbeat
  3. C) balancing the body
  4. D) All of the above three
In which part of the body bile is synthesized?
  1. A) Liver
  2. B) Spleen
  3. C) Gall bladder
  4. D) Pancreas
Match List-I with List-II and select the correct answer by using the codes given below the lists:
List-I - List-II

A) Donetz - 1) Germany
B) Kuzantsk - 2) U.K.
C) Lancashaire - 3) Russia
D) Saar - 4) Ukraine
  1. A) A-1 B-2 C-3 D-4
  2. B) A-4 B-3 C-2 D-1
  3. C) A-3 B-4 C-1 D-2
  4. D) A-1 B-3 C-2 D-4
U.P. Science Congress was organised from 2nd to 4th March, 2013 at:
  1. A) Banaras Hindu University, Varanasi
  2. B) Lucknow University, Lucknow
  3. C) Rohilkhand University, Bareilly
  4. D) D. D. U. Gorakhpur University, Gorakhpur
The important metal used with iron to produce stainless steel, is:
  1. A) Aluminium
  2. B) Chromium
  3. C) Tin
  4. D) Carbon
A man feels unpleasant due to humidity and heat. The reason for this is:
  1. A) More sweating
  2. B) Less sweating
  3. C) Sweat does not evaporate due to humidity
  4. D) Sweat is not formed due to humidity
When were High Courts established in Bombay, Madras and Calcutta?
  1. A) 1861
  2. B) 1851
  3. C) 1871
  4. D) 1881
The bacteria responsible for fixing nitrogen in Soyabean is:
  1. A) Rhizobium Leguminoserum
  2. B) Rhizobium japonicum
  3. C) Rhizobium phaseoli
  4. D) Rhizobium trifolii
The total number of members of Uttar Pradesh Legislative council is
  1. A) 105
  2. B) 106
  3. C) 107
  4. D) 108