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In a flask, colourless N_{2}*O_{4}(g) is in equilibrium with brown coloured N*O_{2}(g) . At equilibrium when the flask is heated to 100 deg * C , the brown colour deepens and on cooling it becomes less coloured. Which statement is incorrect about this observation?
1. The Delta*H for the reaction N 2 O 4 (g) rev rxn sign 2N*O_{2}(g) is ve
2. Paramagnetism increases on heating
3. The Delta*H - Delta*U at 100 deg * C is equal to 200 cal
4. Dimerisation is reduced on heating?
Most Upvoted Answer
In a flask, colourless N_{2}*O_{4}(g) is in equilibrium with brown col...
Incorrect Statement Explanation:
1. The Delta*H for the reaction N 2 O 4 (g) rev rxn sign 2N*O_{2}(g) is ve
- This statement is correct. The reaction N 2 O 4 (g) ⇌ 2NO 2 (g) is an exothermic reaction, which means that the enthalpy change (Delta*H) for this reaction is negative.
2. Paramagnetism increases on heating
- This statement is correct. The brown color of NO 2 gas is due to its paramagnetic nature. When the flask is heated, the equilibrium shifts towards the formation of more NO 2 gas, leading to an increase in paramagnetism.
3. The Delta*H - Delta*U at 100 deg * C is equal to 200 cal
- This statement is incorrect. The difference between Delta*H (enthalpy change) and Delta*U (internal energy change) at 100 deg * C is not necessarily equal to 200 cal. The relationship between Delta*H and Delta*U is given by the equation: Delta*H = Delta*U + P*Delta*V, where P is the pressure and Delta*V is the change in volume.
4. Dimerisation is reduced on heating
- This statement is incorrect. Dimerisation of N 2 O 4 to form NO 2 is favored at higher temperatures. When the flask is heated to 100 deg * C, the equilibrium shifts towards the formation of more NO 2 gas, leading to a deeper brown color. On cooling, the equilibrium shifts back towards the formation of N 2 O 4, resulting in a less colored solution.
In conclusion, the incorrect statement is number 3, as the difference between Delta*H and Delta*U at 100 deg * C is not necessarily equal to 200 cal.
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In a flask, colourless N_{2}*O_{4}(g) is in equilibrium with brown coloured N*O_{2}(g) . At equilibrium when the flask is heated to 100 deg * C , the brown colour deepens and on cooling it becomes less coloured. Which statement is incorrect about this observation? 1. The Delta*H for the reaction N 2 O 4 (g) rev rxn sign 2N*O_{2}(g) is ve 2. Paramagnetism increases on heating 3. The Delta*H - Delta*U at 100 deg * C is equal to 200 cal 4. Dimerisation is reduced on heating?
Question Description
In a flask, colourless N_{2}*O_{4}(g) is in equilibrium with brown coloured N*O_{2}(g) . At equilibrium when the flask is heated to 100 deg * C , the brown colour deepens and on cooling it becomes less coloured. Which statement is incorrect about this observation? 1. The Delta*H for the reaction N 2 O 4 (g) rev rxn sign 2N*O_{2}(g) is ve 2. Paramagnetism increases on heating 3. The Delta*H - Delta*U at 100 deg * C is equal to 200 cal 4. Dimerisation is reduced on heating? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about In a flask, colourless N_{2}*O_{4}(g) is in equilibrium with brown coloured N*O_{2}(g) . At equilibrium when the flask is heated to 100 deg * C , the brown colour deepens and on cooling it becomes less coloured. Which statement is incorrect about this observation? 1. The Delta*H for the reaction N 2 O 4 (g) rev rxn sign 2N*O_{2}(g) is ve 2. Paramagnetism increases on heating 3. The Delta*H - Delta*U at 100 deg * C is equal to 200 cal 4. Dimerisation is reduced on heating? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a flask, colourless N_{2}*O_{4}(g) is in equilibrium with brown coloured N*O_{2}(g) . At equilibrium when the flask is heated to 100 deg * C , the brown colour deepens and on cooling it becomes less coloured. Which statement is incorrect about this observation? 1. The Delta*H for the reaction N 2 O 4 (g) rev rxn sign 2N*O_{2}(g) is ve 2. Paramagnetism increases on heating 3. The Delta*H - Delta*U at 100 deg * C is equal to 200 cal 4. Dimerisation is reduced on heating?.
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