set 1 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) both the above
(b) is that “body” which allows the short wavelength incoming solar radiation to enter in, but does not allow long wavelength outgoing infra-red radiations to escape out
(c) is an enclosure of glass in which plants are kept to protect them from cold air outside
(d) none of the above
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
Which raw material is used in the preparation of soft glass ?
a) Na2CO3, SiO2, CaCO3
b) K2CO3, SiO2, PbCO3
c) K2CO3, Sio2, CaCO3
d) Na2CO3, SiO
Answer: (a)
Question : 2
Which among the following statements is false?
a) The main reason for river water pollution is industrial and domestic sewage discharge
b) Surface water contains a lot of organic matter mineral nutrients and radioactive materials
c) Oil slick in sea water increases D.O. value
d) Oil spill in sea water causes heavy damage to fishery
Answer »Answer: (c)
Oil slick in sea water decreases D.O value.
Question : 3
Living in the atmosphere of CO is dangerous because it
a) Dries up the blood
b) Reduces organic matter of tissues
c) Combined with O2 present inside to form CO2
d) Combines with haemoglobin and makes it incapable of absorbing oxygen
Answer »Answer: (d)
When CO is not ventilated it binds to haemoglobin, which is the principal oxygen-carrying compound in blood; this produces a compound known as carboxyhaemoglobin.
The traditional belief is that carbon monoxide toxicity arises from the formation of carboxyhaemoglobin, which decreases the oxygen-carrying capacity of the blood and inhibits the transport, delivery, and utilization of oxygen by the body.
Question : 4
Which of the following gases is not a green house gas?
a) O3
b) CH4
c) CO
d) H2O vapour
Answer »Answer: (c)
Question : 5
Which of the following gas causes pollution –
a) CO
b) SO2
c) Both (a) and (b)
d) None of the above
Answer »Answer: (c)
Question : 6
The substance which is not regarded as a pollutant?
a) CO2
b) O3
c) NO2
d) Hydrocarbons
Answer »Answer: (a)
CO2 is generally not regarded as an pollutant.
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