MPSC Combined 2023 GS Paper 1 — Question 66
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जर 1.0 मोल आदर्श वायूचे आकारमान मानक तापमान आणि दाबाला 22.4 Lit असेल तर सर्वकष वायु स्थिरांक, R ______ असतो. If one mole of an ideal gas occupies 22.4 Lit at Standard Temperature and Pressure, then the value of the universal gas constant R is
a)0.0821 atm Lit mol-1 K-1✓ Correct
b)8.314 x 10⁷ Joules K-1 mol-1
c)82.1 atm Lit mol-1 K-1
d)8.314 erg K-1 mol-1
The universal gas constant R has standard values: 0.0821 atm L mol-1 K-1 or 8.314 J K-1 mol-1 (which is 8.314 x 10⁷ erg K-1 mol-1). Option (a) gives R in L atm units, while option (b) gives it in Joules which is 8.314 J, but the exponent 10⁷ makes it ergs. Wait, 8.314 J = 8.314 x 10⁷ ergs. Let's check standard values.