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) Ozone can oxidise sulphur dioxide present in the atmosphere to sulphur trioxide.
(b) Ozone hole is thinning of ozone layer present in stratosphere.
(c) Ozone is not responsible for green house effect.
(d) Ozone is produced in upper stratosphere by the action of UV rays on oxygen.
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
Water is often treated with chlorine to
a) increase oxygen content
b) kill germs
c) remove hardness
d) remove suspended particles
Answer »Answer: (b)
water is often treated with Cl2 to kill germs.
Question : 2
Which one of the following chemicals is used in beauty parlours for hair-setting? [NDA]
a) Silicon based
b) Phosphorus based
c) Sulphur based
d) Iron based
Answer »Answer: (a)
Question : 3
The chemical used as a ‘fixer’ in photography is
a) Ammonium persulphate
b) Sodium thiosulphate
c) Sodium sulphate
d) Borax
Answer »Answer: (b)
Question : 4
Which of the following is not a consequence of greenhouse effect?
a) Plants in warmer climates with adequate rainfall would grow faster
b) The incidence of infectious diseases is likely to increase
c) Climatic conditions will be changed
d) Malaria will be controlled as the mosquitoes will not survive.
Answer »Answer: (d)
The mosquitoes will increase their population and spread malaria.
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