Related Questions
What is the correct answer?
4
If two gases have same reduced temperature and reduced pressure, then they will have the same
What is the correct answer?
4
Compressibility factor-reduced pressure plot on reduced co-ordinates facilitates
A. Use of only one graph for all gases
B. Covering of wide range
D. More accurate plotting
What is the correct answer?
4
One mole of nitrogen at 8 bar and 600 K is contained in a piston-cylinder arrangement. It is brought to 1 bar isothermally against a resisting pressure of 1 bar. The work done (in Joules) by the gas is
What is the correct answer?
4
A refrigerator works on the principle of __________ law of thermodynamics.
What is the correct answer?
4
Cp - Cv = R is valid for __________ gases.
What is the correct answer?
4
Which of the following is an undesirable characteristic of a refrigerant?
A. It should be non-explosive
B. It should have a sub-atmospheric vapor pressure at the temperature in refrigerator coils
C. Its vapor pressure at the condenser temperature should be very high
What is the correct answer?
4
The unity of Planck's constant 'h' in the equation, E = hv is
What is the correct answer?
4
In the reaction, C + O2 → CO2; ΔH = - 94 kcal. What is the heat content (enthalpy) of O2?
What is the correct answer?
4
For an ideal gas, the internal energy depends upon its __________ only.
What is the correct answer?
4
The value of Cp & Cv respectively for monatomic gases in Kcal/kg Mole.°K are
What is the correct answer?
4
The reaction A (l) → R(g) is allowed to reach equilibrium conditions in an autoclave. At equilibrium, there are two phases, one a pure liquid phase of A and the other a vapor phase of A, R and S. Initially A alone is present. The numbers of degrees of freedom are:
What is the correct answer?
4
PVγ = Constant (where, γ = Cp/Cv) is valid for a/an __________ process.
What is the correct answer?
4
At the critical point of a substance
A. The surface tension vanishes
B. Liquid and vapour have the same density
C. There is no distinction between liquid and vapour phases
What is the correct answer?
4
The ammonia synthesis reaction represented by N2 + 3H2 2NH3; ΔH = - 22.4 kcal, is
What is the correct answer?
4
For an ideal gas, the activity co-efficient is
A. Directly proportional to pressure
B. Inversely proportional to pressure
C. Unity at all pressures
What is the correct answer?
4
The equation, (d loge PA/d loge xA) = (d loge PA/d loge xB) applicable to a binary solution of components. A and B in equilibrium with their vapors at constant temperature and pressure is called the __________ equation.
What is the correct answer?
4
If different processes are used to bring about the same chemical reaction, the enthalpy change is same for all of them. This is __________ law.
What is the correct answer?
4
The efficiency of an Otto engine compared to that of a diesel engine, for the same compression ratio will be
D. Data insufficient to predict
What is the correct answer?
4
In the equation, PVn = Constant, if the value of n = 0, then it represents a reversible __________ process.
What is the correct answer?
4
The principle applied in liquefaction of gases is
What is the correct answer?
4
Steam undergoes isentropic expansion in a turbine from 5000 kPa and 400°C (entropy = 6.65 kJ/kg K) to 150 kPa) (entropy of saturated liquid = 1.4336 kJ/kg. K, entropy of saturated vapour = 7.2234 kJ/kg. K) The exit condition of steam is
B. Partially condensed vapour with quality of 0.9
D. Partially condensed vapour with quality of 0.1
What is the correct answer?
4
Free energy changes for two reaction mechanism 'X' and 'Y are respectively - 15 and - 5 units. It implies that X is
C. Three times slower than Y
D. Three times faster than Y
What is the correct answer?
4
At the absolute zero temperature, the entropy of every perfectly crystalline substance becomes zero. This follows from the
A. Third law of thermodynamics
B. Second law of thermodynamics
What is the correct answer?
4
When pressure is applied on the system, ice ↔ water, then
A. Equilibrium cannot be established
B. More ice will be formed
C. More water will be formed
D. Evaporation of water will take place
What is the correct answer?
4
At normal boiling point, molar entropy of vaporisation is __________ Joule/K°.mole.
What is the correct answer?
4
Claude's liquefaction process employs the cooling of gases by
A. Expansion in an engine
B. Following a constant pressure cycle
What is the correct answer?
4
__________ does not change during phase transformation processes like sublimation, melting & vaporisation.
What is the correct answer?
4
Maximum work that could be secured by expanding the gas over a given pressure range is the __________ work.
What is the correct answer?
4
A refrigerator may be termed as a
What is the correct answer?
4
An ideal monatomic gas is taken round the cycle ABCDA as shown below in the P-V diagram. The work done during the cycle is