Check MCQ Questions for Class 11 Chemistry Chapter 14 Environmental Chemistry with Answers from CBSE section on e akhabaar
We have compiled the NCERT MCQ Questions for Class 11 Chemistry Chapter 14 Environmental Chemistry with Answers Pdf free download covering the entire syllabus. Practice MCQ Questions for Class 11 Chemistry with Answers on a daily basis and score well in exams. Refer to the Environmental Chemistry Class 11 MCQs Questions with Answers here along with a detailed explanation.
Environmental Chemistry Class 11 MCQs Questions with Answers
Multiple Choice Type Questions
Question 1.
Which of the following has greatest affinity for haemoglobin?
(a) CO
(b) NO
(c) O2
(d) CO2
Answer
Answer: (b) NO
Question 2.
Which of the following is the coldest region?
(a) Troposphere
(b) Mesosphere
(c) Stratosphere
(d) Thermosphere.
Answer
Answer: (b) Mesosphere
Question 3.
The aromatic compounds present as particulates are
(a) Benzene
(b) Toluene
(c) Nitrobenzene
(d) Poly cyclic hydrocarbons.
Answer
Answer: (d) Poly cyclic hydrocarbons.
Question 4.
Ozone layer is present in
(a) Troposphere
(b) Stratosphere
(c) Mesophere
(d) Exosphere
Answer
Answer: (b) Stratosphere
Question 5.
Depletion of ozone layer causes
(a) Blood cancer
(b) Lung cancer
(c) Skin cancer
(d) Breast cancer.
Answer
Answer: (c) Skin cancer
Question 6.
Photochemical smog is formed in
(a) Summer during morning time
(b) Summer during day time
(c) Winter during morning time
(d) Winter during day time.
Answer
Answer: (b) Summer during day time
Question 7.
Which of the following is not involved in formation of photochemical smog?
(a) NO
(b) O3
(c) CxHy
(d) SO2
Answer
Answer: (d) SO2
Question 8.
The most abundant hydrocarbon pollutant is
(a) Methane
(b) Ethane
(c) Propane
(d) Butane
Answer
Answer: (a) Methane
Question 9.
Which of the following is present in maximum amount in acid rain?
(a) HNO3
(b) H2SO4
(c) HCl
(d) H2CO3
Answer
Answer: (b) H2SO4
Question 10.
Which of the following is not considered a pollutant?
(a) NO2
(b) CO2
(c) O3
(d) CxHy
Answer
Answer: (b) CO2
Question 11.
Which of the following is not a greenhouse gas?
(a) CO2
(b) CH4
(c) Chlorofluorocarbons
(d) O2
Answer
Answer: (d) O2
Question 12.
The size of the particulates of H2SO4 fog lies in the range
(a) 5-100 nm
(b) 100-500 nm
(c) 500-1000 nm
(d) 1000-10000 nm
Answer
Answer: (c) 500-1000 nm
Question 13.
Which of the following is true about photochemical smog?
(a) It is reducing in nature
(b) It is formed during winter
(c) It is a mixture of smoke and fog
(d) It causes irritation in eyes.
Answer
Answer: (d) It causes irritation in eyes.
Question 14.
Which of the following statement is false?
(a) London smog is oxidising in nature
(b) London smog contains H2SO4 droplets
(c) London smog is formed during winter
(d) London smog causes bronchitis.
Answer
Answer: (a) London smog is oxidising in nature
Question 15.
The region closest to earth’s surface is
(a) Stratosphere
(b) Mesosphere
(c) Troposphere
(d) Thermosphere.
Answer
Answer: (c) Troposphere
Question 16.
The major source of CO pollution is
(a) Industrial process
(b) Vehicular exhaust
(c) Forest fires
(d) Volcanic activity.
Answer
Answer: (b) Vehicular exhaust
Question 17.
Which one of the following particulates is most toxic?
(a) Fly ash
(b) Soot
(c) Inorganic compounds
(d) Smog
Answer
Answer: (b) Soot
Question 18.
Increased concentration of CO2 in atmosphere is responsible for
(a) Green house effect
(b) Acid rain
(c) Lack of photosynthesis
(d) Death of aquatic life.
Answer
Answer: (a) Green house effect
Question 19.
Marble acts as a sink for
(a) Metallic pollutants
(b) NH3 pollutants
(c) Acidic pollutants
(d) None of these.
Answer
Answer: (c) Acidic pollutants
Question 20.
Who did not win Noble prize in chemistry in 2005 for green chemistry among the following
(a) Y Chauvin
(b) R.H. Grubbs
(c) R.R. Schrock
(d) Polyani
Answer
Answer: (d) Polyani
Question 21.
The atmospheric gas which cannot produce green house effect is
(a) N2
(b) H2O
(c) CO2
(d) O3
Answer
Answer: (a) N2
Question 22.
High concentration of fluoride is poisonous & harmful to bones & teeth at levels over.
(a) 1 ppm
(b) 3 ppm
(c) 5 ppm
(d) 10 ppm
Answer
Answer: (d) 10 ppm
Fill in the blanks
Question 1.
Herbicides are used to kill ……………….
Answer
Answer: weeds
Question 2.
The major component of troposphere are ………………. & ……………….
Answer
Answer: nitrogen, oxygen
Question 3.
Acid rain is caused by the oxides of ………………. & ……………….
Answer
Answer: Sulphur, nitrogen
Question 4.
The ………………. matter is in air reduces the visibility.
Answer
Answer: Particulate
Question 5.
The smog linked to the excessive vehicle traffic is ……………….
Answer
Answer: Photo chemical smog
Question 6.
The major cause of ozone depletion is the release of ……………….
Answer
Answer: Chloro-fluoro carbons
Question 7.
During winter the ………………. are formed over ANTARCTICA.
Answer
Answer: Polar stratospheric cloud
Question 8.
………………. are substances that are used to kill or block the reproductive processes of unwanted organism.
Answer
Answer: Pesticides
Question 9.
Incineration converts organic matter into ………………. & ……………….
Answer
Answer: CO2, H2O
Question 10.
………………. is a measure of the pollution caused by the oxygen demanding wastes which can be oxidized in the presence of micro-organisms.
Answer
Answer: B.O.D.
Write True / False
Question 1.
Bacteria, Algae etc are non-viable particulates.
Answer
Answer: False
Question 2.
CO is a very poisonous gas & acts as an air pollutant.
Answer
Answer: True
Question 3.
Green house effect means more agricultural output.
Answer
Answer: False
Question 4.
When the pH of rain water is below 3.6, it is called acid rain.
Answer
Answer: False
Question 5.
Ozone hole occurs over Antarctica mainly during SEPTEMBER- OCTOBER & it gets replenished in NOVEMBER-DECEMBER.
Answer
Answer: True
Question 6.
C.O.D. is always larger than B.O.D.
Answer
Answer: True
Question 7.
High concentrations of fluoride are poisonous & are harmful to bones & teeth at levels over 10 ppm.
Answer
Answer: True
Question 8.
CO2 is not considered as a pollutant of the atmosphere.
Answer
Answer: True
Question 9.
Methyl cyclohexane is an ozone depleting molecule.
Answer
Answer: False
Question 10.
Only toxic compound are pollutants.
Answer
Answer: False
Match the Following
Column I | Column II |
1. Combination with haemoglobin | (a) CO2 |
2. Acid rain | (b) SO2 |
3. Photo chemical smog | (c) NO |
4. Depletion of ozone layer | (d) CxHy |
5. Green house effect | (e) CO |
6. The use of D.D.T. has been banned in many countries because it is | (f) Vehicular exhaust |
7. The major source of CO pollution is | (g) non-biodegradable |
8. B.O.D | (h) Chemical oxygen demand |
9. C.O.D | (i) Poly chlorinated biphenyls |
10. P.C.Bs. | (j) Bio-chemical oxygen demand |
Answer
Answer:
Column I | Column II |
1. Combination with haemoglobin | (e) CO |
2. Acid rain | (b) SO2 |
3. Photo chemical smog | (d) CxHy |
4. Depletion of ozone layer | (c) NO |
5. Green house effect | (a) CO2 |
6. The use of D.D.T. has been banned in many countries because it is | (g) non-biodegradable |
7. The major source of CO pollution is | (f) Vehicular exhaust |
8. B.O.D | (j) Bio-chemical oxygen demand |
9. C.O.D | (h) Chemical oxygen demand |
10. P.C.Bs. | (i) Poly chlorinated biphenyls |
Hope the information shed above regarding NCERT MCQ Questions for Class 11 Chemistry Chapter 14 Environmental Chemistry with Answers Pdf free download has been useful to an extent. If you have any other queries of CBSE Class 11 Chemistry Environmental Chemistry MCQs Multiple Choice Questions with Answers, feel free to reach us so that we can revert back to us at the earliest possible.
Post your comments about MCQ Questions for Class 11 Chemistry Chapter 14 Environmental Chemistry with Answers below.