The enthalpy of combustion of methane, graphite, and dihydrogen at 298 K are, –890.3 kJ mol–1 , –393.5 kJ mol–1, and –285.8 kJ mol–1 respectively. The enthalpy of formation of CH4(g) is-
1. | –74.8 kJ mol–1 | 2. | –52.27 kJ mol–1 |
3. | +74.8 kJ mol–1 | 4. | +52.26 kJ mol–1 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyFor the reaction A + B → C + D + q (kJ/mol), entropy change is positive. The reaction will be
1. Possible only at high temperature
2. Possible only at low temperature
3. Not possible at any temperature
4. Possible at any temperature
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe enthalpy of combustion of carbon to CO2 is –393.5 kJ mol-1. The amount of heat released upon formation of 35.2 g of CO2 from carbon and dioxygen gas would be:
1. | –393.5 kJ mol–1 | 2. | –314.8 kJ mol–1 |
3. | +314.8 kJ mol–1 | 4. | –320.5 kJ mol–1 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyFor the reaction, , the value of ∆H and ∆S are respectively:
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhat is a necessary condition for an adiabatic process to occur?
1. ∆T = 0
2. ∆P = 0
3. q = 0
4. w = 0
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe enthalpy of formation of all elements in their standard state is-
1. | Unity | 2. | Zero |
3. | Less than zero | 4. | Different for each element |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biologyfor combustion of methane is –x kJ mol–1.
The value of for the same reaction would be:
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology701 J of heat is absorbed by a system and 394 J of work is done by the system. The change in internal energy for the process is:
1. | 307 J | 2. | -307 J |
3. | 1095 J | 4. | -701 J |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe reaction of cyanamide, with dioxygen, was carried out in a bomb calorimeter, and ∆U was found to be at 298 K.
\(\small{\mathrm{NH}_2 \mathrm{CN}(\mathrm{s})+\frac{3}{2} \mathrm{O}_2(\mathrm{g}) \rightarrow \mathrm{N}_2(\mathrm{g})+\mathrm{CO}_2(\mathrm{g})+\mathrm{H}_2 \mathrm{O}(\mathrm{l})}\)
The enthalpy change for the reaction at 298 K would be:
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe amount of heat needed to raise the temperature of 60.0 g of aluminium from 35°C to 55°C would be:
(Molar heat capacity of Al is \(24\) \(J\) \(\text{mol}^{- 1}\) \(K^{- 1}\))
1. | \(1 . 07\) \(J\) | 2. | \(1 . 07\) \(kJ\) |
3. | \(106 . 7\) \(kJ\) | 4. | \(100 . 7\) \(kJ\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology