The Joule-Thomson co-efficient is defined as (∂T/∂P)H. Its value at the inversion point is:
A. ∞
B. 1
C. 0
D. -ve
When a gas in a vessel expands, its internal energy decreases. The process involved is:
A. Reversible
B. Irreversible
C. Isothermal
D. Adiabatic
For a single component two phase mixture, the number of independent variable properties are:
A. Two
B. One
C. Zero
D. Three
Change of heat content when one mole of compound is burnt in oxygen at constant pressure is called the:
A. Calorific value
B. Heat of reaction
C. Heat of combustion
D. Heat of formation
What is the value of ln y (where y = activity co-efficient) for ideal gases:
A. Zero
B. Unity
C. Infinity
D. Negative
What is the number of degree of freedom for a system of two miscible non-reacting species in vapor-liquid equilibrium forming an azeotrope:
A. 0
B. 2
C. 1
D. 3
In the ammonia synthesis reaction, N2 + 3H2 ⇌ 2NH3 + 22.4 kcal, the formation of NH3 will be favoured by:
A. High temperature
B. Low pressure
C. Low temperature only
D. Both low temperature and high pressure
Grams of butane (C4H10) formed by the liquefaction of 448 litres of the gas (measured at (STP) would be:
A. 580
B. 640
C. 1160
D. Data insufficient; can’t be computed
Joule-Thomson co-efficient for a perfect gas is:
A. Zero
B. Positive
C. Negative
D. None of these
Tea kept in a thermos flask is vigorously shaken. If the tea is considered as a system, then its temperature will:
A. Increase
B. Decrease
C. Remain unchanged
D. First fall and then rise
