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) 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
The correct answers to the above question in:
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.
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Read more environmental chemistry Based General Science Questions and Answers
Question : 1
The greatest affinity for haemoglobin is shown by which of the following :
a) CO
b) O2
c) NO
d) CO2
Answer »Answer: (c)
Haemoglobin has great affinity for NO.
Question : 2
When rain is accompanied by a thunderstorm, the collected rain water will have a pH value
a) slightly higher than that when the thunderstorm is not there
b) uninfluenced by occurrence of thunderstorm
c) slightly lower than that of rain water without thunderstorm
d) which depends upon the amount of dust in air
Answer »Answer: (c)
Normal rainwater has a pH of 5.6
Thunderstorm results in the formation of NO and HNO3 which lowers the pH.
Question : 3
The pollutants which came directly in the air from sources are called primary pollutants. Primary pollutants are sometimes converted into secondary pollutants. Which of the following belongs to secondary air pollutants?
a) Hydrocarbon
b) Peroxyacetyl nitrate
c) CO
d) NO
Answer »Answer: (b)
Question : 4
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 : 5
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 : 6
A green house
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
Answer »Answer: (a)
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