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) It is cheaper
(b) Its resistance is negligible
(c) Its melting point is high
(d) Filament is easily made
The correct answers to the above question in:
Answer: (c)
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Read more environmental chemistry Based General Science Questions and Answers
Question : 1
Ozone layer in upper atmosphere (stratosphere) is destroyed by –
a) chlorofluoro carbon (CFC)
b) photochemical smog
c) hydrochloric acid
d) sulphur dioxide
Answer »Answer: (a)
Question : 2
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 : 3
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 : 4
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 : 5
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)
Question : 6
The statement which is not true:
a) SO3 is more harmful air pollutant than SO2
b) NO2 does not play any role in photochemical smog
c) SO2 does not affect larynx (voice box)
d) NO is more toxic to living tissues than NO2
Answer »Answer: (a)
SO3 is more harmful pollutant than SO2.
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