इस पोस्ट में क्या है
show
12th Biology chapter 16 Bihar board with NCERT-Details & Highlights
| name of content | 12th Biology chapter 16 full solution |
| content | Biology objective type MCQ question with answer |
| name of subjects | class 12 Biology |
| important for exam | Bihar board & other state board |
| pattern & Level | NCERT & State level question |
12th Biology chapter 16 all objective solutions – download PDF
1. Which of the following is a Green House Gas?
-
- (A) Methane
- (B) Carbon dioxide
- (C) Chlorofluorocarbons
- (D) all of them
Answer: (D) All of them
2. Which of these hundred diseases are caused by allergens?
-
- (A) skin cancer
- (B) hay fever
- (C) internal fever
- (D) goosebumps
Answer: (B) Hay fever
3. The major source of methane in India is
-
- (A) Sugarcane fields
- (B) paddy fields
- (C) Wheat fields
- (D) Plantation
Answer: (B) Paddy field
4. Which of the following chemical substances affects the ozone layer?
-
- (A) Chlorofluorocarbons
- (B) Chlorine
- (C) Hexafluorocarbon
- (D) molecular carbon
Answer: (A) Chlorofluorocarbons
5. Which element acts as a catalyst in the decomposition of ozone?
-
- (A) Chlorine
- (B) fluorine
- (C) Oxygen
- (D) Potassium
Answer: (A) Chlorine
6. At what level is the ozone layer found?
-
- (A) Stratosphere
- (B) Lithosphere
- (C) Troposphere
- (D) Hemosphere
Answer: (A) Stratosphere
7. Acid rain comes under which type of pollution?
-
- (A) water pollution
- (B) air pollution
- (C) ‘ A ‘ and ‘ B ‘. Both
- (D) none of these
Answer: (B) Air pollution
8. What arrangement did the king of Jodhpur (Rajasthan) ask the minister to make for the construction of his palace?
-
- (A) Wood
- (B) Marble
- (C) Coal
- (D) Brick
Answer: (A) Wood
9. So is an indicator of pollution
-
- (A) Algae
- (B) Lichen
- (C) Fungus
- (D) all of them
Answer: (B) Lichen
10. Which of the following led to the Chipko movement?
-
- ( A ) 1974
- ( B ) 1980
- ( C ) 1984
- ( D ) 2004
Answer : ( A ) 1974
11. The cause of increased skin cancer and high mutation rate is
-
- (A) Acid rain
- (B) ozone depletion
- (C) CO2 pollution
- (D) CO pollution
Answer: (B) ozone depletion
most important mcq solution 12th biology chapter 16
12. Blue wavy syndrome occurs
-
- (A) Excess of TDS
- (B) Excess of DO
- (C) excess of chloride
- (D) methemoglobin
Answer: (D) Methemoglobin
13. Chipko Movement was established to protect the
-
- (A) Grassland
- (B) Jungle
- (C) mountain
- (D) River
Answer: (B) Jungle
14. Activate in the purification of sewage
-
- (A) animal plankton
- (B) fish
- (C) Bacteria
- (D) all of them
Answer: (C) Bacteria
15. The permissible level of noise at night in a residential area is
-
- ( A ) 35 dB
- ( B ) 40 dB
- ( C ) 45dB
- ( D ) 50dB
Answer: (C) 45dB
16. Pisces disease is born
-
- (A) accumulation of arsenic in drinking water
- (B) accumulation of fluoride in drinking water
- (C) Consumption of fish contaminated with mercury
- (D) spreading of oil in water
Answer: (C) Consumption of fish contaminated with mercury
17. The concentration of fluoride in the atmosphere increases due to
-
- (A) Chlorosis
- (B) Necosis
- (C) Fluorosis
- (D) all of the above
Answer: (D) All of the above
18. What type of pollutant is peroxy acetyl nitrate?
-
- (A) primary pollutant
- (B) Second pollutant
- (C) water pollutant
- (D) noise pollutant
Answer: (B) Second pollutant
19. In which year the Environment (Protection) Act came into effect?
-
- ( A ) 1986
- ( B ) 1989
- ( C ) 1992
- ( D ) 1993
Answer : ( C ) 1992
20. By which of these actions the concentration of DDT increases in the next trophic level?
-
- (A) Water – bursting
- (B) Bio-magnification
- (C) eutrophication
- (D) ozone pollution
Ans: (B) Bio-magnification
21. Bhopal gas tragedy caused by the leakage of which gas?
-
- (A) PAN
- (B) smog
- (C) Methyl isocyanate
- ( D ) so
Answer: (C) Methyl isocyanate
22. Most effective for eutrophication in water bodies
-
- (A) Inorganic phosphate
- (B) organic matter
- (C) blood
- (D) bacteria
Answer: (A) Inorganic phosphate
23. Due to the effect of radiations over a long period of time and repeatedly
-
- (A) skin cancer
- (B) lung cancer
- (C) Blood – Cancer
- (D) Fluorosis
Answer: (A) Skin cancer
24. Which of the following is a natural air pollutant?
-
- (A) gases emanating from the volcano
- (B) pollen grains
- (C) dust particles
- (D) all of them
Answer: (D) All of them
| Next Subject | Next Chapter |
Bihar board 12th Biology chapter 16 complete objective
12th Biology objective: we have covered all mcq type objective question of 12th Biology chapter 16 on this post, and I hope it will be helpful your board exam. now its time to share it with your friends, and also suggest me what you need.
chapter 16 Biology objective question
12th Biology chapter 16, class 12 Biology chapter 16 objective questions in hindi, class 12 Biology chapter 16 mcq questions pdf download, Biology mcq for class 12 with answers chapter 16 electric charges and fields, 12th class Biology chapter 16 objective, class 12 Biology chapter 16, Bihar board Biology chapter 16 class 12.
Biology multiple choice questions with answers for class 12 pdf, mcq questions for class 12 Biology chapter wise pdf, Biology objective questions for 12th pdf, Biology objective questions for 12th pdf in hindi, Biology objective questions for 12th bihar board pdf,
Bihar board 12th science stream subjects wise solution
click here to check out Bihar board science stream all subjects solutions
| SL.N. | Subject name with solutions |
| 01 | Physics |
| 02 | Chemistry |
| 03 | Biology |
| 04 | Math |
| 05 | Hindi |
| 06 | English |