AIIMS2005Physics-Thermodynamics
AIIMS 2005 Physics Enthalpy of Formation MCQ Question
Type: MCQ-conceptual-Medium-Class 11
ΔHf° (298 K) of methanol is given by the chemical equation
A
CH₄ (g) + 1/2 Ω₂ (g) → CH₃OH (l)
B
C (graphite) + 1/2 Ω₂ (g) + 2H₂ (g) → CH₃OH (l)
C
C (diamond) + 1/2 Ω₂ (g) + 2H₂ (g) → CH₃OH (l)
D
CO (g) + 2H₂ (g) → CH₃OH (l)
Correct Answer
Option B
Detailed Explanation
Methanol can be prepared synthetically by heating carbon monoxide and hydrogen gases under pressure in the presence of a catalyst.
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