MCQOPTIONS
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MCQOPTIONS
This section includes 8247 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1851. |
The internal energy of an ideal gas is a function of its __________ only. |
| A. | molecular size |
| B. | volume |
| C. | pressure |
| D. | temperature |
| Answer» E. | |
| 1852. |
At constant temperature and pressure, for one mole of a pure substance, the ratio of the free energy to the chemical potential is |
| A. | zero |
| B. | one |
| C. | infinity |
| D. | negative |
| Answer» C. infinity | |
| 1853. |
The change in __________ is equal to the reversible work for compression in steady state flow process under isothermal condition. |
| A. | internal energy |
| B. | enthalpy |
| C. | Gibbs free energy |
| D. | Helmholtz free energy |
| Answer» D. Helmholtz free energy | |
| 1854. |
Which of the following is clausius-Clayperon equation for vaporisation of an ideal gas under the condition that the molar volume of liquid is negligible compared to that of the vapor ? |
| A. | <img src="/_files/images/chemical-engineering/chemical-engineering-thermodynamics/419-412-1.png"> |
| B. | <img src="/_files/images/chemical-engineering/chemical-engineering-thermodynamics/419-412-2.png"> |
| C. | <img src="/_files/images/chemical-engineering/chemical-engineering-thermodynamics/419-412-3.png"> |
| D. | <img src="/_files/images/chemical-engineering/chemical-engineering-thermodynamics/419-412-4.png"> |
| Answer» B. <img src="/_files/images/chemical-engineering/chemical-engineering-thermodynamics/419-412-2.png"> | |
| 1855. |
When a gas is subjected to adiabatic expansion, it gets cooled due to |
| A. | decrease in velocity. |
| B. | decrease in temperature. |
| C. | decrease in kinetic energy. |
| D. | energy spent in doing work. |
| Answer» E. | |
| 1856. |
Joule-Thomson effect i.e., a throttling process is a constant __________ process. |
| A. | entropy |
| B. | temperature |
| C. | internal energy |
| D. | enthalpy |
| Answer» E. | |
| 1857. |
In the equation, PVn = Constant, if the value of n = 0, then it represents a reversible __________ process. |
| A. | isobaric |
| B. | isothermal |
| C. | isentropic |
| D. | isometric |
| Answer» B. isothermal | |
| 1858. |
Fugacity is most helpful in |
| A. | representing actual behaviour of real gases. |
| B. | representing actual behaviour of ideal gases. |
| C. | the study of chemical equilibria involving gases at atmospheric pressure. |
| D. | none of these |
| Answer» B. representing actual behaviour of ideal gases. | |
| 1859. |
The energy of activation of exothermic reaction is |
| A. | zero. |
| B. | negative. |
| C. | very large compared to that for en-dothermic reaction. |
| D. | not possible to predict. |
| Answer» E. | |
| 1860. |
In the reaction; N2 + O2 2NO, increasing the pressure will result in |
| A. | shifting the equilibrium towards right, |
| B. | shifting the equilibrium towards left. |
| C. | no change in equilibrium condition. |
| D. | none of these. |
| Answer» D. none of these. | |
| 1861. |
A cyclic engine exchanges heat with two reservoirs maintained at 100 and 300 C respectively. The maximum work (in J) that can be obtained from 1000 J of heat extracted from the hot reservoir is |
| A. | 349 |
| B. | 651 |
| C. | 667 |
| D. | 1000 |
| Answer» B. 651 | |
| 1862. |
When dilute aqueous solutions of two salts are mixed, the process is associated with |
| A. | decrease in temperature. |
| B. | increase in temperature. |
| C. | no change in temperature. |
| D. | change in temperature which is a function of composition. |
| Answer» C. no change in temperature. | |
| 1863. |
Which of the following is not an extensive property ? |
| A. | Free energy |
| B. | Entropy |
| C. | Refractive index |
| D. | None of these |
| Answer» D. None of these | |
| 1864. |
Enthalpy of a gas depends upon its |
| A. | temperature |
| B. | mass |
| C. | volume |
| D. | pressure |
| Answer» B. mass | |
| 1865. |
Gibbs free energy (G) is represented by, G = H - TS, whereas Helmholtz free energy, (A) is given by, A = E - TS. Which of the following is the Gibbs-Helmholtz equation |
| A. | <img src="/_files/images/chemical-engineering/chemical-engineering-thermodynamics/421-426-1.png"> |
| B. | <img src="/_files/images/chemical-engineering/chemical-engineering-thermodynamics/421-426-2.png"> |
| C. | both (a) and (b) |
| D. | neither (a) nor (b) |
| Answer» D. neither (a) nor (b) | |
| 1866. |
Which of the following is an undesirable characteristics 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. |
| D. | None of these. |
| Answer» C. Its vapor pressure at the condenser temperature should be very high. | |
| 1867. |
Forward reaction will be favoured for the exothermic reaction, represented by CO + H2O CO2 + H2, by |
| A. | low temperature and high pressure. |
| B. | low temperature and low pressure. |
| C. | high temperature and high pressure. |
| D. | high temperature and low pressure. |
| Answer» B. low temperature and low pressure. | |
| 1868. |
"The rate at which a substance reacts is proportional to its active mass and the rate of a chemical reaction is proportional to the product of active masses of the reacting substances". This is the |
| A. | Lewis-Randall rule. |
| B. | statement of Vant-Hoff equation. |
| C. | Le-Chatelier's principle. |
| D. | none of these. |
| Answer» E. | |
| 1869. |
What is the ratio of adiabatic compressibility to isothermal compressibility ? |
| A. | 1 |
| B. | < 1 |
| C. | > 1 |
| D. | >> 1 |
| Answer» C. > 1 | |
| 1870. |
The absolute entropy for all crystalline substances at absolute zero temperature is |
| A. | zero |
| B. | negative |
| C. | more than zero |
| D. | indeterminate |
| Answer» B. negative | |
| 1871. |
The standard Gibbs free energy change of a reaction depends on the equilibrium |
| A. | pressure |
| B. | temperature |
| C. | composition |
| D. | all (a), (b) and (c) |
| Answer» C. composition | |
| 1872. |
Gibbs-Duhem equation relates composition in liquid phase and the __________ at constant temperature & pressure. |
| A. | fugacity |
| B. | partial pressure |
| C. | activity co-efficient |
| D. | (a), (b), and (c) |
| Answer» E. | |
| 1873. |
In an ideal solution, the activity of a component equals its |
| A. | mole fraction. |
| B. | fugacity at the same temperature and pressure. |
| C. | partial pressure. |
| D. | none of these. |
| Answer» B. fugacity at the same temperature and pressure. | |
| 1874. |
A gas has a volume of 27.3 c.c. at 0 C. Its volume at 10 C (if pressure remains unchanged) will be __________ c.c. |
| A. | 2.73 |
| B. | 28.3 |
| C. | 273 |
| D. | 283 |
| Answer» C. 273 | |
| 1875. |
Chemical engineering thermodynamics is concerned with the __________ in/of chemical processes. |
| A. | reaction mechanism |
| B. | calculation of rates |
| C. | energy transformation from one form to the another |
| D. | none of these |
| Answer» D. none of these | |
| 1876. |
An isolated system can exchange __________ with its surroundings. |
| A. | matter |
| B. | energy |
| C. | neither matter nor energy |
| D. | both matter and energy |
| Answer» D. both matter and energy | |
| 1877. |
Requisites of a reversible process is that the |
| A. | system and surroundings pressure be equal. |
| B. | friction in the system should be absent. |
| C. | system and surroundings temperature be equal. |
| D. | none of these. |
| Answer» C. system and surroundings temperature be equal. | |
| 1878. |
If the pressure on 100 c.c. of air is halved, then its volume (at the same temperature) would be __________ c.c. |
| A. | 100 |
| B. | 50 |
| C. | 205 |
| D. | 200 |
| Answer» E. | |
| 1879. |
The principle applied in liquefaction of gases is |
| A. | adiabatic expansion. |
| B. | Joule-Thomson effect. |
| C. | both (a) and (b). |
| D. | neither (a) nor (b). |
| Answer» D. neither (a) nor (b). | |
| 1880. |
What is the value of ln y (where y = activity co-efficient) for ideal gases ? |
| A. | Zero |
| B. | Unity |
| C. | Infinity |
| D. | Negative |
| Answer» B. Unity | |
| 1881. |
The partial pressure of each constituent present in an alloy is __________ the total vapor pressure exerted by the alloy. |
| A. | less than |
| B. | equal to |
| C. | more than |
| D. | either (b) or (c); depends on the type of alloy |
| Answer» B. equal to | |
| 1882. |
Heat is added at constant pressure in an ideal __________ cycle. |
| A. | Stirling |
| B. | Brayton |
| C. | Rankine |
| D. | both (b) and (c) |
| Answer» E. | |
| 1883. |
A liquid under pressure greater than its vapour pressure for the temperature involved is called a __________ liquid. |
| A. | subcooled |
| B. | saturated |
| C. | non-solidifiable |
| D. | none of these |
| Answer» B. saturated | |
| 1884. |
For a real gas, the chemical potential is given by |
| A. | <i> RT dlnP </i> |
| B. | <i>RT dlnf </i> |
| C. | <i>R dlnf</i> |
| D. | none of these |
| Answer» C. <i>R dlnf</i> | |
| 1885. |
At absolute zero temperature, all substances have the same |
| A. | heat capacity |
| B. | crystalline structure |
| C. | entropy |
| D. | none of these |
| Answer» B. crystalline structure | |
| 1886. |
is the mathematical expression for |
| A. | <i>C<sub>V</sub></i> |
| B. | entropy change |
| C. | Gibbs free energy |
| D. | none of these |
| Answer» E. | |
| 1887. |
Chemical potential is a/an |
| A. | extensive property. |
| B. | intensive property. |
| C. | force which drives the chemical system to equilibrium. |
| D. | both (b) and (c). |
| Answer» E. | |
| 1888. |
In polytropic process (PVn = constant), if n = 1; it means a/an __________ process. |
| A. | adiabatic |
| B. | reversible |
| C. | isothermal |
| D. | none of these |
| Answer» D. none of these | |
| 1889. |
__________ nuclear reactor does not require a heat exchanger to supply steam to power turbine. |
| A. | Molten sodium cooled |
| B. | Helium cooled |
| C. | Boiling water |
| D. | Pressurised water |
| Answer» D. Pressurised water | |
| 1890. |
Specific gravity of uranium and plutonium is about |
| A. | 9 |
| B. | 13 |
| C. | 19 |
| D. | 27 |
| Answer» D. 27 | |
| 1891. |
If 4 gm of a radioisotope has a half life period of 10 days, the half life of 2 gm of the same istotope will be __________ days. |
| A. | 5 |
| B. | 10 |
| C. | 20 |
| D. | 30 |
| Answer» C. 20 | |
| 1892. |
__________ moderator is used in a fast breeder reactor. |
| A. | Graphite |
| B. | Heavy water |
| C. | Beryllium |
| D. | No |
| Answer» E. | |
| 1893. |
A moderator __________ the neutrons. |
| A. | slows down |
| B. | absorbs |
| C. | accelerates |
| D. | reflects |
| Answer» B. absorbs | |
| 1894. |
Nuclear fuel generally used in reactors is uranium oxide instead of uranium, because the former has higher |
| A. | melting point, hence can be subjected to higher temperature. |
| B. | density ; hence core volume for a given power output would be smaller. |
| C. | resistance to effects of irradiation. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 1895. |
Nuclear fuel complex, Hyderabad is engaged in the job of |
| A. | manufacture of nuclear fuel elements/assemblies . |
| B. | processing of uranium ore. |
| C. | treatment of spent fuel. |
| D. | none of these. |
| Answer» B. processing of uranium ore. | |
| 1896. |
The number of neutrons accompanying the formation of 54Xe139 and 38Sr94 from the absorption of a slow neutron by 92U235 , followed by nuclear fission is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 1897. |
A fertile material is the one, which can be |
| A. | converted into fissile material on absorption of neutron. |
| B. | fissioned by slow (thermal) neutrons. |
| C. | fissioned by fast neutrons. |
| D. | fissioned by either slow or fast neutrons. |
| Answer» B. fissioned by slow (thermal) neutrons. | |
| 1898. |
Fast breeder nuclear reactors using enriched uranium as fuel may contain upto a maximum of __________ percent of U-235 (i.e. fissile material). |
| A. | 15 |
| B. | 45 |
| C. | 65 |
| D. | 85 |
| Answer» E. | |
| 1899. |
Thorium metal |
| A. | resembles steel in appearance. |
| B. | is less hard (in the range of silver). |
| C. | is highly ductile. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 1900. |
Enrichment of uranium is done to increase the concentration of __________ in the natural uranium. |
| A. | U-238 |
| B. | U-233 |
| C. | U-235 |
| D. | Pu-239 |
| Answer» D. Pu-239 | |