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JEE Exam  >  JEE Questions  >  The redox reaction among the following is:a)R... Start Learning for Free
The redox reaction among the following is:
  • a)
    Reaction of [Co(H2O)6]Cl3 with AgNO3
  • b)
    Formation of ozone from atmospheric oxygen in the presence of sunlight
  • c)
    Combination of dinitrogen with dioxygen at 2000 K
  • d)
    Reaction of H2SO4 with NaOH
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
The redox reaction among the following is:a)Reaction of [Co(H2O)6]Cl3 ...
The redox reaction among the given options is the combination of dinitrogen (N2) with dioxygen (O2) at 2000 K.

Explanation:
Redox reactions involve the transfer of electrons between species. In these reactions, one species is oxidized (loses electrons) while another species is reduced (gains electrons). Let's analyze each option to identify the redox reaction:

a) Reaction of [Co(H2O)6]Cl3 with AgNO3:
In this reaction, the cobalt complex [Co(H2O)6]3+ is displaced by the silver ion, resulting in the formation of [Ag(H2O)6]3+ and Cl- ions. There is no change in the oxidation state of any element, so this is not a redox reaction.

b) Formation of ozone from atmospheric oxygen in the presence of sunlight:
The formation of ozone (O3) from oxygen (O2) in the presence of sunlight is a photochemical reaction. It involves the splitting of O2 molecules into individual oxygen atoms, which then combine with other O2 molecules to form ozone. This reaction does not involve any change in the oxidation state of oxygen, so it is not a redox reaction.

c) Combination of dinitrogen with dioxygen at 2000 K:
This is the redox reaction among the given options. At high temperatures (2000 K), nitrogen gas (N2) can react with oxygen gas (O2) to form nitrogen dioxide (NO2). In this reaction, nitrogen undergoes oxidation from an oxidation state of 0 in N2 to +4 in NO2, while oxygen undergoes reduction from an oxidation state of 0 in O2 to -2 in NO2.

d) Reaction of H2SO4 with NaOH:
When sulfuric acid (H2SO4) reacts with sodium hydroxide (NaOH), a neutralization reaction occurs. The hydrogen ions (H+) from sulfuric acid combine with the hydroxide ions (OH-) from sodium hydroxide to form water (H2O), and the remaining sodium ion (Na+) and sulfate ion (SO42-) combine to form sodium sulfate (Na2SO4). There is no change in the oxidation state of any element, so this is not a redox reaction.

In summary, the redox reaction among the given options is the combination of dinitrogen with dioxygen at 2000 K.
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Community Answer
The redox reaction among the following is:a)Reaction of [Co(H2O)6]Cl3 ...
The redox reaction is:

Nitrogen is oxidised, while oxygen is reduced. Reaction of [CO(H2O)6]Cl3 with AgNO3 is not a redox reaction. It is a precipitation reaction.
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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. The value of theoretical lapse rate on the earth is (use g = 9.8 m/s2 ; R = 8.3 J/mol-k and M = 29 g/mol)

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

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. If behaviour of the mixing of parcels of air is approximately assumed to be adiabatic then lapse rate can be expressed as

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The redox reaction among the following is:a)Reaction of [Co(H2O)6]Cl3 with AgNO3b)Formation of ozone from atmospheric oxygen in the presence of sunlightc)Combination of dinitrogen with dioxygen at 2000 Kd)Reaction of H2SO4 with NaOHCorrect answer is option 'C'. Can you explain this answer?
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