set 2 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 3 EXERCISES
The following question based on environmental chemistry topic of general science mcq
(a) chlorofluoro carbon (CFC)
(b) photochemical smog
(c) hydrochloric acid
(d) sulphur dioxide
The correct answers to the above question in:
Answer: (a)
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Read more environmental chemistry Based General Science Questions and Answers
Question : 1
What is DDT among the following ?
a) A fertilizer
b) Biodegradable pollutant
c) Greenhouse gas
d) Non-biodegradable pollutant
Answer »Answer: (d)
DDT is a non-biodegradable pollutant.
Question : 2
Photochemical smog occurs in warm, dry and sunny climate. One of the following is not amongst the components of photochemical smog, identify it.
a) O3
b) SO2
c) NO2
d) Unsaturated hydrocarbon
Answer »Answer: (b)
Question : 3
Which one of the following is associated with the formation of brown air in traffic congested cities?
a) Carbon dioxide
b) Nitrogen oxide
c) Sulphur dioxide
d) Carbon monoxide
Answer »Answer: (b)
Question : 4
The filament of an electric bulb is of tungsten because –
a) It is cheaper
b) Its resistance is negligible
c) Its melting point is high
d) Filament is easily made
Answer »Answer: (c)
Question : 5
Dinitrogen and dioxygen are main constituents of air but these do not react with each other to form oxides of nitrogen because __________.
a) the reaction can be initiated only in presence of a catalyst.
b) oxides of nitrogen are unstable.
c) the reaction is endothermic and requires very high temperature.
d) N2 and O2 are unreactive.
Answer »Answer: (c)
Question : 6
Flint glass is obtained from which of the following?
a) Sodium aluminum borosilicate
b) Sand, red lead and potassium carbonate
c) Zinc and barium borosilicate
d) Pure silica and zinc oxide
Answer »Answer: (b)
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