345230
Montreal protocol was signed in 1987 for control of:
1 Emission of ozone depleting substances
2 Release of Green House gases
3 Disposal of e-wastes
4 Transport of genetically modified organisms from country to another
Explanation:
Emission of ozone depleting substances
NEET - 2020
BIOXII16: ENVIRONMENTAL ISSUES
345231
In what way a refirigerant (CFCs) molecule contributes degradation of ozone?
1 UV rays act on \(\mathrm{CFCs}\) releasing \(\mathrm{Cl}\) atoms
2 CFCs directly reacts with ozone changing its physical properties.
3 CFCs directly reacts with ozone changing its chemical properties.
4 None of the above.
Explanation:
In stratosphere, UV rays act on CFCs releasing \(\mathrm{Cl}\) atoms. \(\mathrm{Cl}\) degrades ozone releasing molecular oxygen, with these atoms acting merely as catalysts; \(\mathrm{Cl}\) atoms are not consumed in the reaction. Hence, whatever CFCs are added to the stratosphere, they have permanent and continuing effects on Ozone levels.
BIOXII16: ENVIRONMENTAL ISSUES
345232
In which year Montreal protocol was signed to control the emission of ozone?
1 1978
2 1987
3 1887
4 1989
Explanation:
An international treaty, known as the Montreal Protocol, was signed at Montreal (Canada) in 1987 (effective in 1989) to control the emission of ozone depleting substances.
BIOXII16: ENVIRONMENTAL ISSUES
345233
Which part of an eye mainly gets damaged due to high exposure of UV-B rays?
1 Pupil
2 Cornea
3 Vitreous body
4 Retina
Explanation:
In human eye, cornea absorbs UV-B radiation, and a high dose of UV-B causes inflammation of cornea, called snow-blindness, cataract, etc. Such exposure may permanently damage the cornea.
BIOXII16: ENVIRONMENTAL ISSUES
345234
Which of the following is an incorrect sequence?
1 Urbanisation \( \to \) Habitat loss \( \to \) Anthropogenic extinction of Tasmanian wolf
2 Increase in \({\rm{S}}{{\rm{O}}_{\rm{2}}}{\rm{,N}}{{\rm{O}}_{\rm{2}}}\) concentration in air \( \to \) Acidrain \( \to \) leaching of essential minerals from soil
3 Increase in concentration of \(\mathrm{CO}_{2}, \mathrm{CFC}\), \(\mathrm{CH}_{4}\) in air \( \to \) ozone depletion \( \to \) Skin cancer, \( \to \) Cataract.
4 Sewage disposal in water bodies \( \to \) Nutrient enrichment \( \to \) Eutrophication \( \to \) Algal bloom
Explanation:
Cataract is a disorder of the eye lens due to ageing process.
345230
Montreal protocol was signed in 1987 for control of:
1 Emission of ozone depleting substances
2 Release of Green House gases
3 Disposal of e-wastes
4 Transport of genetically modified organisms from country to another
Explanation:
Emission of ozone depleting substances
NEET - 2020
BIOXII16: ENVIRONMENTAL ISSUES
345231
In what way a refirigerant (CFCs) molecule contributes degradation of ozone?
1 UV rays act on \(\mathrm{CFCs}\) releasing \(\mathrm{Cl}\) atoms
2 CFCs directly reacts with ozone changing its physical properties.
3 CFCs directly reacts with ozone changing its chemical properties.
4 None of the above.
Explanation:
In stratosphere, UV rays act on CFCs releasing \(\mathrm{Cl}\) atoms. \(\mathrm{Cl}\) degrades ozone releasing molecular oxygen, with these atoms acting merely as catalysts; \(\mathrm{Cl}\) atoms are not consumed in the reaction. Hence, whatever CFCs are added to the stratosphere, they have permanent and continuing effects on Ozone levels.
BIOXII16: ENVIRONMENTAL ISSUES
345232
In which year Montreal protocol was signed to control the emission of ozone?
1 1978
2 1987
3 1887
4 1989
Explanation:
An international treaty, known as the Montreal Protocol, was signed at Montreal (Canada) in 1987 (effective in 1989) to control the emission of ozone depleting substances.
BIOXII16: ENVIRONMENTAL ISSUES
345233
Which part of an eye mainly gets damaged due to high exposure of UV-B rays?
1 Pupil
2 Cornea
3 Vitreous body
4 Retina
Explanation:
In human eye, cornea absorbs UV-B radiation, and a high dose of UV-B causes inflammation of cornea, called snow-blindness, cataract, etc. Such exposure may permanently damage the cornea.
BIOXII16: ENVIRONMENTAL ISSUES
345234
Which of the following is an incorrect sequence?
1 Urbanisation \( \to \) Habitat loss \( \to \) Anthropogenic extinction of Tasmanian wolf
2 Increase in \({\rm{S}}{{\rm{O}}_{\rm{2}}}{\rm{,N}}{{\rm{O}}_{\rm{2}}}\) concentration in air \( \to \) Acidrain \( \to \) leaching of essential minerals from soil
3 Increase in concentration of \(\mathrm{CO}_{2}, \mathrm{CFC}\), \(\mathrm{CH}_{4}\) in air \( \to \) ozone depletion \( \to \) Skin cancer, \( \to \) Cataract.
4 Sewage disposal in water bodies \( \to \) Nutrient enrichment \( \to \) Eutrophication \( \to \) Algal bloom
Explanation:
Cataract is a disorder of the eye lens due to ageing process.
345230
Montreal protocol was signed in 1987 for control of:
1 Emission of ozone depleting substances
2 Release of Green House gases
3 Disposal of e-wastes
4 Transport of genetically modified organisms from country to another
Explanation:
Emission of ozone depleting substances
NEET - 2020
BIOXII16: ENVIRONMENTAL ISSUES
345231
In what way a refirigerant (CFCs) molecule contributes degradation of ozone?
1 UV rays act on \(\mathrm{CFCs}\) releasing \(\mathrm{Cl}\) atoms
2 CFCs directly reacts with ozone changing its physical properties.
3 CFCs directly reacts with ozone changing its chemical properties.
4 None of the above.
Explanation:
In stratosphere, UV rays act on CFCs releasing \(\mathrm{Cl}\) atoms. \(\mathrm{Cl}\) degrades ozone releasing molecular oxygen, with these atoms acting merely as catalysts; \(\mathrm{Cl}\) atoms are not consumed in the reaction. Hence, whatever CFCs are added to the stratosphere, they have permanent and continuing effects on Ozone levels.
BIOXII16: ENVIRONMENTAL ISSUES
345232
In which year Montreal protocol was signed to control the emission of ozone?
1 1978
2 1987
3 1887
4 1989
Explanation:
An international treaty, known as the Montreal Protocol, was signed at Montreal (Canada) in 1987 (effective in 1989) to control the emission of ozone depleting substances.
BIOXII16: ENVIRONMENTAL ISSUES
345233
Which part of an eye mainly gets damaged due to high exposure of UV-B rays?
1 Pupil
2 Cornea
3 Vitreous body
4 Retina
Explanation:
In human eye, cornea absorbs UV-B radiation, and a high dose of UV-B causes inflammation of cornea, called snow-blindness, cataract, etc. Such exposure may permanently damage the cornea.
BIOXII16: ENVIRONMENTAL ISSUES
345234
Which of the following is an incorrect sequence?
1 Urbanisation \( \to \) Habitat loss \( \to \) Anthropogenic extinction of Tasmanian wolf
2 Increase in \({\rm{S}}{{\rm{O}}_{\rm{2}}}{\rm{,N}}{{\rm{O}}_{\rm{2}}}\) concentration in air \( \to \) Acidrain \( \to \) leaching of essential minerals from soil
3 Increase in concentration of \(\mathrm{CO}_{2}, \mathrm{CFC}\), \(\mathrm{CH}_{4}\) in air \( \to \) ozone depletion \( \to \) Skin cancer, \( \to \) Cataract.
4 Sewage disposal in water bodies \( \to \) Nutrient enrichment \( \to \) Eutrophication \( \to \) Algal bloom
Explanation:
Cataract is a disorder of the eye lens due to ageing process.
345230
Montreal protocol was signed in 1987 for control of:
1 Emission of ozone depleting substances
2 Release of Green House gases
3 Disposal of e-wastes
4 Transport of genetically modified organisms from country to another
Explanation:
Emission of ozone depleting substances
NEET - 2020
BIOXII16: ENVIRONMENTAL ISSUES
345231
In what way a refirigerant (CFCs) molecule contributes degradation of ozone?
1 UV rays act on \(\mathrm{CFCs}\) releasing \(\mathrm{Cl}\) atoms
2 CFCs directly reacts with ozone changing its physical properties.
3 CFCs directly reacts with ozone changing its chemical properties.
4 None of the above.
Explanation:
In stratosphere, UV rays act on CFCs releasing \(\mathrm{Cl}\) atoms. \(\mathrm{Cl}\) degrades ozone releasing molecular oxygen, with these atoms acting merely as catalysts; \(\mathrm{Cl}\) atoms are not consumed in the reaction. Hence, whatever CFCs are added to the stratosphere, they have permanent and continuing effects on Ozone levels.
BIOXII16: ENVIRONMENTAL ISSUES
345232
In which year Montreal protocol was signed to control the emission of ozone?
1 1978
2 1987
3 1887
4 1989
Explanation:
An international treaty, known as the Montreal Protocol, was signed at Montreal (Canada) in 1987 (effective in 1989) to control the emission of ozone depleting substances.
BIOXII16: ENVIRONMENTAL ISSUES
345233
Which part of an eye mainly gets damaged due to high exposure of UV-B rays?
1 Pupil
2 Cornea
3 Vitreous body
4 Retina
Explanation:
In human eye, cornea absorbs UV-B radiation, and a high dose of UV-B causes inflammation of cornea, called snow-blindness, cataract, etc. Such exposure may permanently damage the cornea.
BIOXII16: ENVIRONMENTAL ISSUES
345234
Which of the following is an incorrect sequence?
1 Urbanisation \( \to \) Habitat loss \( \to \) Anthropogenic extinction of Tasmanian wolf
2 Increase in \({\rm{S}}{{\rm{O}}_{\rm{2}}}{\rm{,N}}{{\rm{O}}_{\rm{2}}}\) concentration in air \( \to \) Acidrain \( \to \) leaching of essential minerals from soil
3 Increase in concentration of \(\mathrm{CO}_{2}, \mathrm{CFC}\), \(\mathrm{CH}_{4}\) in air \( \to \) ozone depletion \( \to \) Skin cancer, \( \to \) Cataract.
4 Sewage disposal in water bodies \( \to \) Nutrient enrichment \( \to \) Eutrophication \( \to \) Algal bloom
Explanation:
Cataract is a disorder of the eye lens due to ageing process.
345230
Montreal protocol was signed in 1987 for control of:
1 Emission of ozone depleting substances
2 Release of Green House gases
3 Disposal of e-wastes
4 Transport of genetically modified organisms from country to another
Explanation:
Emission of ozone depleting substances
NEET - 2020
BIOXII16: ENVIRONMENTAL ISSUES
345231
In what way a refirigerant (CFCs) molecule contributes degradation of ozone?
1 UV rays act on \(\mathrm{CFCs}\) releasing \(\mathrm{Cl}\) atoms
2 CFCs directly reacts with ozone changing its physical properties.
3 CFCs directly reacts with ozone changing its chemical properties.
4 None of the above.
Explanation:
In stratosphere, UV rays act on CFCs releasing \(\mathrm{Cl}\) atoms. \(\mathrm{Cl}\) degrades ozone releasing molecular oxygen, with these atoms acting merely as catalysts; \(\mathrm{Cl}\) atoms are not consumed in the reaction. Hence, whatever CFCs are added to the stratosphere, they have permanent and continuing effects on Ozone levels.
BIOXII16: ENVIRONMENTAL ISSUES
345232
In which year Montreal protocol was signed to control the emission of ozone?
1 1978
2 1987
3 1887
4 1989
Explanation:
An international treaty, known as the Montreal Protocol, was signed at Montreal (Canada) in 1987 (effective in 1989) to control the emission of ozone depleting substances.
BIOXII16: ENVIRONMENTAL ISSUES
345233
Which part of an eye mainly gets damaged due to high exposure of UV-B rays?
1 Pupil
2 Cornea
3 Vitreous body
4 Retina
Explanation:
In human eye, cornea absorbs UV-B radiation, and a high dose of UV-B causes inflammation of cornea, called snow-blindness, cataract, etc. Such exposure may permanently damage the cornea.
BIOXII16: ENVIRONMENTAL ISSUES
345234
Which of the following is an incorrect sequence?
1 Urbanisation \( \to \) Habitat loss \( \to \) Anthropogenic extinction of Tasmanian wolf
2 Increase in \({\rm{S}}{{\rm{O}}_{\rm{2}}}{\rm{,N}}{{\rm{O}}_{\rm{2}}}\) concentration in air \( \to \) Acidrain \( \to \) leaching of essential minerals from soil
3 Increase in concentration of \(\mathrm{CO}_{2}, \mathrm{CFC}\), \(\mathrm{CH}_{4}\) in air \( \to \) ozone depletion \( \to \) Skin cancer, \( \to \) Cataract.
4 Sewage disposal in water bodies \( \to \) Nutrient enrichment \( \to \) Eutrophication \( \to \) Algal bloom
Explanation:
Cataract is a disorder of the eye lens due to ageing process.
