- 1(current)
Q. No.Three thermochemical equations are given below:
Based on the above equations, find out which one of the relationships given below is correct :
| (i) | C(graphite) + O2(g) \(\rightarrow\) CO2(g); \(\Delta_{r}\)H° = x kJ mol–1 |
| (ii) | Cgraphite + 1/2 O2(g) \(\rightarrow\) CO(g); \(\Delta_{r}\)H° = y kJ mol–1 |
| (iii) | CO(g) + 1/2 O2(g) \(\rightarrow\) CO2(g); \(\Delta_{r}\)H° = z kJ mol–1 |
| 1. | z = x + y | 2. | x = y + z |
| 3. | y = 2z – x | 4. | x = y – z |
Subtopic: Hess's Law |
80%
From NCERT
NEET - 2013
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Which of the following statements about the advantage of roasting sulphide ore before reduction is not true?
| 1. | Carbon and hydrogen act as suitable reducing agents for metal sulphides |
| 2. | The \(\Delta_f G^0\) of the sulphide is greater than those for \(C S_2\) and \(\mathrm{H}_2 \mathrm{~S}\) |
| 3. | The \(\Delta_f G^0\) is negative for roasting of sulphur ore to oxide. |
| 4. | Roasting of the sulphide to the oxide is thermodynamically feasible |
Subtopic: Gibbs Energy Change | Hess's Law |
From NCERT
AIPMT - 2007
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NEET 2023 - Target Batch - Aryan Raj Singh
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