set 3 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) Ca2SiO4
(b) Ca3SiO5
(c) Ca3Al2O6
(d) Ca3(PO4)2
The correct answers to the above question in:
Answer: (d)
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Read more environmental chemistry Based General Science Questions and Answers
Question : 1
Which one of the following statements about ozone and ozone layer is true?
a) The conversion of ozone to oxygen is an endothermic reaction
b) Ozone layer is beneficial to us because ozone cuts out the ultraviolet radiation of the sun
c) Ozone has a triatomic linear molecule
d) None
Answer »Answer: (b)
Statement (a) is correct.
Question : 2
Sewage containing organic waste should not be disposed in water bodies because it causes major water pollution. Fishes in such a polluted water die because of
a) increase in the amount of dissolved oxygen
b) decrease in the amount of dissolved oxygen in water
c) large number of mosquitoes
d) clogging of gills by mud
Answer »Answer: (b)
Question : 3
Some statements about the benefits of organic farming are given below. Indicate whether they are true or false using the codes given below the statements :
- It reduces CO2 emissions.
- It does not lead to toxic effects.
- It improves the water-retention capacity of the soil.
a) False - True - True
b) True - False - False
c) False - True - False
d) False - True - True
Answer »Answer: (a)
Question : 4
The false statement among the followings :
a) Limestone acts as a sink for $SO_x$
b) $SO_x$ can be removed from flue gases by passing through a solution of citrate ions
c) The average residence time of NO is one month
d) Ammonia acts as a sink for $NO_x$
Answer »Answer: (c)
The average residence time of NO is 4 days.
Question : 5
It is said, the Tajmahal may be destroyed due to –
a) Air pollutants released from oil refinery of Mathura
b) Decomposition of marble as a result of high temperature
c) Flood in Yamuna river
d) All the above
Answer »Answer: (a)
Question : 6
Presence of which of the following fuel gas in the exhaust fumes shows incomplete combustion of fuel?
a) Carbon monoxide and water vapour
b) Carbon monoxide
c) Sulphur dioxide
d) Nitrogen dioxide
Answer »Answer: (b)
Presence of CO in the exhaust fumes shows incomplete combustion.
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