Class 12th Exam Biology Objective MCQ Question Chapter Wise in English
16. ENVIRONMENTAL ISSUES
1. Which of the following is not a green house gas ?
(A) Methane
(B) Chlorofluorocarbon
(C) CO2
(D) Nitrogen
| Answer :- (D) |
2. Biogas contains :
(A) CO2
(B) H2S
(C) CH4
(D) All of these
| Answer :- (D) |
3. Chipko Movement is associated with :
(A) cultivation of trees
(B) protecting trees from felling down by human beings
(C) giving up tobacco abuse
(D) all of these
| Answer :- (B) |
4. The two gases making highest relative contribution to green house gases are :
(A) CH4 and N2O
(B) CFCs and N2O
(C) CO2 and N2O
(D) CO2 and CH4
| Answer :- (D) |
5. Eutrophication is often seen in :
(A) Ocean
(B) Mountains
(C) Deserts
(D) Fresh water lakes
| Answer :- (D) |
6. ‘Good ozone’ is found in :
(A) Stratosphere
(B) Ionosphere
(C) Mesosphere
(D) Trophosphere
| Answer :- (A) |
7. Global agreement to reduce release of ODS is :
(A) Montreal Protocol
(B) Kyoton Protocol
(C) Viena Convention
(D) Rio de Janeiro Conference
| Answer :- (A) |
8. Chipko Movement began in :
(A) 1953
(B) 1963
(C) 1969
(D) 1973
| Answer :- (D) |
9. Which one of the following is not pollutant ?
(A) CO2
(B) CO
(C) SO2
(D) NO2
| Answer :- (D) |
10. 5th June is :
(A) World Forest Day
(B) World Red Cross Day
(C). World Environment Day
(D) World Food Day
| Answer :- (C) |
11. Which chemical substance affects the Ozone Layer ?
(A) Chlorofluorocarbon
(B) Chlorine
(C) Hexafluorocarbon
(D) Molecular Carbon
| Answer :- (A) |
12. Environment (Protection) Act came into force in ?
(A) 1986
(B) 1989
(C) 1992
(D) 1993
| Answer :- (C) |
13. Bhopal gas tragedy of 1984 took place because methyl isocyanate reacted with :
(A) DDT
(B) Ammonia
(C) CO2
(D) Water
| Answer :- (D) |
14. Fluoride pollution mainly affect :
(A) Teeth
(B) Kidney
(C) Brain
(D) Heart
| Answer :- (A) |
15. Increased skin cancer and high mutation rate are due to :
(A) Acid Rain
(B) Ozone Depletion
(C) CO2 Pollution
(D) CO Pollution
| Answer :- (B) |
16. Minimata disease is caused by :
(A) By Chromium
(B) By Cadmium
(C) By Methyl mercury
(D) By Radioactive elements
| Answer :- (C) |
17. A mutagenic pollutant is :
(A) Organophosphate
(B) Resins
(C) Hydrocarbons
(D) Nitrogen oxides
| Answer :- (C) |
18. Rain is called acid rain, its pH is below :
(A) 7
(B) 6.5
(C) 6
(D) 5.6
| Answer :- (D) |
19. Pollution of SO2 destroys :
(A) Lichen
(B) Fungi
(C) Algae
(D) Fishes
| Answer :- (A) |
20. Act formulated in 1986 was :
(A) Insecticide Act
(B) Environment (Protection) Act
(C) Water Prevention and Control of Polution Act
(D) All of above
| Answer :- (B) |
21. Compressed Natural Gas (CNG) is :
(A) Propane
(B) Methane
(C) Ethane
(D) Butane
| Answer :- (B) |
22. World’s most problematic aquatic weed is :
(A) Azolla
(B) Wolffia
(C) Eichornia
(D) Trapa
| Answer :- (C) |
23. Which of the following causes biomagnification ?
(A) SO2
(B) Mercury
(C) DDT
(D) Both ‘B’ and ‘C’
| Answer :- (D) |
24. The green scum seen in the fresh water bodies is :
(A) blue green algae
(B) red algae
(C) green algae
(D) Both ‘A’ and ‘C’
| Answer :- (D) |
25. Which of the following International Treaty was signed to control the emission of ozone depleting substances ?
(A) Montreal
(B) Ramsar
(C) Bahai
(D) None of these
| Answer :- (A) |
26. Which of the following is the most dangerous metal pollutant of automobile exhaust ?
(A) Cadmium
(B) Copper
(C) Mercury
(D) Lead
| Answer :- (D) |
27. Factors of acid rain are :
(A) CO and CO2
(B) NO2 and SO2
(C) CO2 and NO2
(D) N2 and NO3
| Answer :- (B) |
28. Lichen is indicators of :
(A) CO2 pollution
(B) SO2 pollution
(C) CO pollution
(D) Water pollution
| Answer :- (B) |
29. Generally threshold of sound intensity for human is :
(A) 20-30 decibel
(B) 80-90 decibel
(C) 120-130 decibel
(D) 140-150 decibel
| Answer :- (A) |
30. World Environment day is celebrated on ::
(A) 5th June
(B) 20th December
(C) 15th March
(D) 7th July
| Answer :- (A) |
31. The safe Noise level fixed by WHO is :
(A) 20-30 Decible
(B) 45 Decible
(C) 75 Decible
(D) 90 Decible
| Answer :- (A) |
32. Which of the following is green house gas ?
(A) Methane
(B) CO2
(C) Chloro fluoro Carbon
(D) All of these
| Answer :- (D) |
33. The thickness of Ozone in a column of air form the ground to the top of atmosphere is measured in terms of:
(A). Dobson unit
(B) Arab unit
(C) Pascal unit
(D) None of these
| Answer :- (A) |
34. Photochemical smog consists of :
(A) SO2, PAN and Smoke
(B) Ozone, PAN and NO2
(C) Ozone, SO2 & Hydrocarbon
(D) SO2, CO2 and Hydrocarbon
| Answer :- (B) |
12th biology objective questions and answers in English, 12th biology objective questions and answers in English 2021, 12th biology objective questions and answers pdf in English, Chemistry Objective question 12th 2021, Bihar Board 12th Biology Objective Question Sexual Reproduction in Flowering Plants Chapter, 12th Biology ka objective question 2021, Biology ka objective question 12th, 12th biology objective questions and answers in English 2020, 12th biology objective, Class 12th Biology Most VVI MCQ Objective Chapter Wise Question in English on New Pattern, BSEB Inter Exam 2021 Biology Objective Question Set10th board, Class 12th Exam Science Stream Biology VVI Objective Type Question Ecosystem Chapter, Class 12th Exam Biology Objective MCQ Question Chapter Wise in English
IMPORTANT LINKS –
| 10TH 12TH MOBILE APP | |
| Class 10th | CLICK |
| Class 12th | CLICK |
| 10th Mobile App | CLICK |
| 12th Mobile App | CLICK |
| 12TH BOARD SCIENCE STREAM | |
| Physics | CLICK |
| Chemistry | CLICK |
| Biology | CLICK |
| Mathematics | CLICK |
| Hindi 100 | CLICK |
| English 100 | CLICK |
Class 12th Biology VVI Objective Question in English Sexual Reproduction in Flowering Plants Chapter, BSEB Inter Exam Biology Chapter wise Objective Question New Pattern, Bihar Board 12th Biology Objective Question Sexual Reproduction in Flowering Plants Chapter, Class 12th Exam Biology VVI Objective Question Human Reproduction Chapter, 12th Board Exam Biology Most VVI MCQ Question Reproductive Health Chapter, Class 12th Board Exam Biology Important Chapter Wise MCQ Question in English, BSEB Inter Exam Biology Important MCQ Question Evolution Chapter in English, Class 12th Biology VVI Objective MCQ Human Health and Diseases Chapter in English, Class 12th Exam Biology Chapter Wise Objective MCQ Question in English, Class 12th Biology Most VVI MCQ Objective Chapter Wise Question in English on New Pattern, BSEB Inter Exam Biology Chapter Wise Objective MCQ Question in English