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) 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
The correct answers to the above question in:
Answer: (b)
Discuss Form
Read more environmental chemistry Based General Science Questions and Answers
Question : 1
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 : 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
Which of the following statements about polar stratosphere clouds (PSCs) is not correct?
a) Type I clouds are formed at about –77ºC and contain solid HNO3 . 3H2O
b) PSCs do not react with chlorine nitrate and HCl
c) Type II clouds are formed at about –85ºC and contain some ice
d) A tight whirlpool of wind called Polar Vortex is formed which surrounds Antarctica
Answer »Answer: (b)
PSCs react with chlorine nitrate and HCl to give HOCl and Cl2.
Question : 4
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 : 5
Which one of the following is not contained in Portland cement ?
a) Ca2SiO4
b) Ca3SiO5
c) Ca3Al2O6
d) Ca3(PO4)2
Answer »Answer: (d)
Question : 6
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.
Verbal Reasoning
Question & Answer Quiz
Non Verbal Reasoning
Question & Answer Quiz
Quantitative Aptitude
Question & Answer Quiz
Computer MCQ
Question & Answer Quiz
General English
Question & Answer Quiz
History GK
Question & Answer Quiz
Polity GK
Question & Answer Quiz
Geography GK
Question & Answer Quiz
Economy GK
Question & Answer Quiz
General Awareness GK
Question & Answer Quiz
Recently Added Subject & Categories For All Competitive Exams
IBPS Clerk Prelims 2024 Synonyms Questions Solved Answers
Most important IBPS Clerk Prelims 2024 Synonyms and Antonyms multiple choice questions and answers with detailed solutions, English vocabulary PDF Download
Continue Reading »
New Cloze Test Questions and Answers PDF - IBPS Clerk 2024
The most important Cloze Test questions with detailed answers for upcoming IBPS Clerk prelims 2024. Latest English verbal ability practice MCQs, PDF
Continue Reading »
Mensuration Aptitude Practice Mcq Questions IBPS Clerk 2024
Most Important Practice Mensuration aptitude multiple choice questions, answers with detailed solutions, PDF beginner to advanced for IBPS Clerk Prelims 2024
Continue Reading »
Top Clock Aptitude Questions and Answers PDF IBPS Clerk 2024
Recent Important IBPS Clerk Prelims 2024 Aptitude Clock MCQ Questions and answers with easy and logical explanation, PDF. Topic wise Free online practice test
Continue Reading »