Given below are two statements
Statement I: Increased carbon dioxide concentration in the ambient atmosphere is likely to make the world's oceans less acidic.
Statement II: Increased carbon dioxide concentration in the ambient atmosphere is likely to impact the coral reefs adversely.
In light of the above statements, choose the correct answer from the options given below:
Statement I is false but Statement II is true
When atmospheric carbon dioxide (CO₂) increases, more of it dissolves into ocean water, forming carbonic acid (H₂CO₃). This lowers the pH of seawater, a process called ocean acidification. So the oceans become MORE acidic, not less.
Statement I claims that rising CO₂ makes the oceans less acidic. This is scientifically wrong — the reverse happens, so Statement I is false.
Statement II claims that rising CO₂ adversely impacts coral reefs. This is correct: acidification reduces the carbonate ions that corals need to build their calcium-carbonate skeletons, leading to weaker skeletons and coral bleaching. So Statement II is true.
The choice saying both statements are true fails because acidification increases, not decreases. The choice saying both are false fails because the coral-reef damage is real. The choice saying only the first is true is the exact opposite of the facts.
Takeaway: More CO₂ → more acidic oceans → harm to coral reefs; hence the first statement is false and the second is true.
Correct answer: Statement I is false but Statement II is true
Similar Questions
Amongst the following Green House Gases (GHGs), whose Global Warming Potential (GWP) is considered as 1?
In the context of climate change which of the following observations are correct for 20th century with reference to 1750?
A. The global average surface temperature has increased by 0.6°C.
B. Greater increase in daytime temperature than night time has been observed.
C. Global average sea level rose 0.1-0.2 m largely due to thermal expansion.
D. The atmosphere concentration of Carbon dioxide (CO2) has increased by 31%.
E. Precipitation in the northern hemisphere has decreased by 1% per decade.
Choose the correct answer from the options given below:Which of the following Green House Gases has no natural source?
Given below are two statements :
Statement I : In many cases, both organisms and human infrastructure will not be able to move or adapt quickly enough to changing climate.
Statement II : Infectious diseases are likely to increase as a result of global warming.
In the light of the above statements, choose the most appropriate answer from the options given below :Full form of IPCC, a nodal agency in the context of climate change, is:
Suppose the concentration of Carbon dioxide, a greenhouse gas responsible for climate change, is 400 ppm. What is its concentration in air in percentage terms?
How many National Missions of the Indian Government are there to address the problem of climate change?
In terms of total $CO_2$ emissions from a country, identify the correct sequence:
In order to avoid catastrophic consequences of climate change, there is general agreement among the countries of the world to limit the rise in average surface temperature of earth compared to that of pre-industrial times by
Which one of the following green house gases has the shortest residence time in the atmosphere?
Important Questions from Climate Change & Global Warming
Greenhouse gas, which is present in the highest quantity in the atmosphere, is
Which one of the following gases have higher Global Warming Potential?
Which of the following two sources of carbon is released?
A) Volcanic eruption
B) Combustion of fossil fuels
C) Landslide
D) Open mining
Choose the correct answer from the options given below:
Considering the global warming potential of CO 2as one, the global warming potential of CH 4has been estimated to be approximately :
Which of the following gas is not involved in the production of acid rain?
