Some scientists have predicted that a global nuclear war on the earth would be followed by a severe andlsquo;nuclear winterandrsquo; with a devastating effect on life on earth. What might be the basis of this prediction?a)Nuclear reactions absorb visible light causing dark days/nightsb)Nuclear reactions absorb atmospheric heat causing coolingc)The clouds produced by global nuclear war would perhaps cover substantial parts of the sky preventing solar light from reaching many parts of the globed)None of the aboveCorrect answer is option 'C'. Can you explain this answer?

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JEE Exam > JEE Questions > Some scientists have predicted that a global ...

a)
Nuclear reactions absorb visible light causing dark days/nights
b)
Nuclear reactions absorb atmospheric heat causing cooling
c)
The clouds produced by global nuclear war would perhaps cover substantial parts of the sky preventing solar light from reaching many parts of the globe
d)
None of the above

Correct answer is option 'C'. Can you explain this answer?

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Some scientists have predicted that a global nuclear war on the earth ...

The use of nuclear weapons would cause the formation of smoke clouds preventing the light from the sun reaching earth surface and it will also deplete the atmosphere and therefore stopping the greenhouse effect and thus doubling the cooling effect.
Hence the correct answer is option C.

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Some scientists have predicted that a global nuclear war on the earth ...

Nuclear winter, which would have catastrophic consequences for life on the planet. The detonation of several hundred nuclear weapons would cause massive fires, which would release large amounts of smoke and soot into the atmosphere. This smoke and soot would block out the sun's rays, causing a sharp drop in global temperatures, reduced rainfall, and a prolonged period of darkness.

The severe climate change caused by a nuclear winter would have devastating effects on the world's ecosystems and agriculture. The reduced sunlight and rainfall would lead to crop failures and food shortages, which would trigger mass starvation and social unrest. The collapse of global trade and infrastructure would exacerbate the impact of the nuclear winter, making it difficult for people to access food, shelter, and medical care.

Moreover, the radioactive fallout from a global nuclear war would pose a significant threat to human health and the environment. The release of radioactive isotopes into the atmosphere and water bodies would contaminate the soil, water, and food chain, causing long-term health problems for survivors and their descendants.

In conclusion, the prospect of a global nuclear war is a grave concern for humanity, and we must work towards preventing such a catastrophic event. The consequences of a nuclear winter would be dire, and we must take steps to reduce the risk of nuclear conflict and promote international cooperation and peace.

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The atmospheric lapse rateFor small volumes of gas, according to kinetic theory of gases, all parts of the gas are at the same temperature. But for huge volumes of gas like atmosphere, assumption of a uniform temperature throughout the gas is not valid. Different parts of the atmosphere are at different temperatures. Apart from the surface of the earth, variations also occur in temperature at different heights in the atmosphere.The decrease in temperature with height called the atmospheric lapse rate is similar at various locations across the surface of the Earth. By analyzing the data collected at various locations, it is found that average global lapse rate is – 6.7 °C/Km.The linear decrease with temperature only occurs in the lower part of the atmosphere called the troposphere. This is the part of the atmosphere in which weather occurs and our planes fly. Above the troposphere is the stratosphere, with an imaginary boundary separating the two layers. In the stratosphere, temperature tends to be relatively constant.Absorption of sunlight at the Earth’s surface warms the troposphere from below, so vertical convection currents are continually mixing in the air. As a parcel of air rises, its pressure drops and it expands. The parcel does work on its surrounding, so that its internal energy and therefore, its temperature drops. Assume that the vertical mixing is so rapid as to be adiabatic and the quantityTP(1 – λ)/λ has a uniform value through the layers of troposphere.(M is molecular mass of the air, R is universal gas constant, g is gravitational acc., P and T are pressure and temperature respectively at the point under consideration and y is height.)Q. Mechanical equilibrium of the atmosphere requires that the pressure decreases with altitude according to . Assuming free fall acceleration to be uniform, then lapse rate is given by

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Some scientists have predicted that a global nuclear war on the earth would be followed by a severe ‘nuclear winter’ with a devastating effect on life on earth. What might be the basis of this prediction?a)Nuclear reactions absorb visible light causing dark days/nightsb)Nuclear reactions absorb atmospheric heat causing coolingc)The clouds produced by global nuclear war would perhaps cover substantial parts of the sky preventing solar light from reaching many parts of the globed)None of the aboveCorrect answer is option 'C'. Can you explain this answer?

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Some scientists have predicted that a global nuclear war on the earth would be followed by a severe ‘nuclear winter’ with a devastating effect on life on earth. What might be the basis of this prediction?a)Nuclear reactions absorb visible light causing dark days/nightsb)Nuclear reactions absorb atmospheric heat causing coolingc)The clouds produced by global nuclear war would perhaps cover substantial parts of the sky preventing solar light from reaching many parts of the globed)None of the aboveCorrect answer is option 'C'. Can you explain this answer? for JEE 2025 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about Some scientists have predicted that a global nuclear war on the earth would be followed by a severe ‘nuclear winter’ with a devastating effect on life on earth. What might be the basis of this prediction?a)Nuclear reactions absorb visible light causing dark days/nightsb)Nuclear reactions absorb atmospheric heat causing coolingc)The clouds produced by global nuclear war would perhaps cover substantial parts of the sky preventing solar light from reaching many parts of the globed)None of the aboveCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for JEE 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Some scientists have predicted that a global nuclear war on the earth would be followed by a severe ‘nuclear winter’ with a devastating effect on life on earth. What might be the basis of this prediction?a)Nuclear reactions absorb visible light causing dark days/nightsb)Nuclear reactions absorb atmospheric heat causing coolingc)The clouds produced by global nuclear war would perhaps cover substantial parts of the sky preventing solar light from reaching many parts of the globed)None of the aboveCorrect answer is option 'C'. Can you explain this answer?.

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