Previous year MCQs

UPPSC 2018 GS-I General science
Question

A powerful eye irritant in the smoke is:

Answer & Solution

Answer: (Detailed Solution Below)

Option D: Peroxyacetyle nitrate

Detailed Solution:

The correct answer is “Peroxyacetyle nitrate ”.

Peroxyacetyle nitrate (PAN) is a powerful eye irritant and a secondary pollutant formed in the atmosphere by the reaction of volatile organic compounds (VOCs) and nitrogen oxides (NOx).

It is a component of photochemical smog and can cause eye and respiratory tract irritation, coughing, and shortness of breath.

Similar Questions:

Cryogenic engine is used for
  1. A) Boeing
  2. B) As a fast rail engine
  3. C) In space shuttle
  4. D) In Nuclear furnace
Three communicable diseases prevalent in developing countries caused by unsafe drinking water and bad sanitation are:
  1. A) acute diarrhoea, cancer and gout
  2. B) malaria, acute diarrhoea and schistosomiasis
  3. C) onchocerciasis, leukaemia and arthritis
  4. D) rheumatism, malaria and AIDS
Arrange the following into chronological order and select the correct answer from the codes given below:

A. Muhammad Shah
B. Jahandar Shah
C. Alamgir II
D. Ahmadshah

Codes:
  1. A) A C D B
  2. B) B A D C
  3. C) C A B D
  4. D) D B C A
Which one of the following is not an explosive matter?
  1. A) Trinitro toluene
  2. B) Dinitro glycerine
  3. C) Cyclo Trimethylene trinitrarmine
  4. D) Nitrochloroform
Which one of the following types of coal contains a higher percentage of carbon than the rest:
  1. A) Anthracite
  2. B) Bituminous coal
  3. C) Lignite
  4. D) Peat
Grains of Basmati rice get elongated on being cooked because of higher content of:
  1. A) lysine
  2. B) amylose
  3. C) sugar
  4. D) oil
Cholestrol is
  1. A) an insecticide
  2. B) a vitamin
  3. C) a steroid
  4. D) an enzyme
A clove represents to which of the following ?
  1. A) Terminal bud
  2. B) Accessory bud
  3. C) Flower bud
  4. D) Vegetative bud
Telescope was invented by:
  1. A) Gallileo
  2. B) Gutinberg
  3. C) Edision
  4. D) Graham Bell
Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R).

Assertion (A): Maximum number of the species of butterflies are found in tropical countries.
Reason (R): Butterflies can not tolerate low temperatures.

Select the correct answer using the codes given below:
Codes:
  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
In coronary artery by-pass surgery the blood vessel to be used as graft has to be:
  1. A) vein from the leg
  2. B) artery from the fore arm
  3. C) artery from mammary region of chest
  4. D) Any of these
Match list-I with list-II and select the correct answer using the code given below the lists:
List-I (molecules) - List-II (elements present)

A. Vitamin B12 - 1. Magnesium
B. Haemoglobin - 2. Cobalt
C. Chlorophyll - 3. Copper
D. Brass - 4. Iron

Code:
A B C D
  1. A) 2 4 1 3
  2. B) 2 1 3 4
  3. C) 4 1 2 3
  4. D) 3 4 2 1