Which Is The Hardest Compound Known?

Which Is The Hardest Compound Known?
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Answer :

Diamond.
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Related questions

How many independent properties are required to completely fix the equilibrium state of a pure gaseous compound?  a. 4  b. 3  c. 2  d. 1

Description : How many independent properties are required to completely fix the equilibrium state of a pure gaseous compound?  a. 4  b. 3  c. 2  d. 1

Last Answer : 2

How many independent properties are required to completely fix the equilibrium state of a pure gaseous compound?  A. 4  B. 3  C. 2  D. 1

Description : How many independent properties are required to completely fix the equilibrium state of a pure gaseous compound?  A. 4  B. 3  C. 2  D. 1

Last Answer : 2

The change that the system that undergoes from one equilibrium state to another is known as  a. oath  b. process  c. enthalpy change  d. entropy change

Description : The change that the system that undergoes from one equilibrium state to another is known as  a. oath  b. process  c. enthalpy change  d. entropy change

Last Answer : process

The phenomenon of melting under pressure and freezing again when the pressure is reduced is known as  a. sublimation  b. condensation  c. deposition  d. regelation

Description : The phenomenon of melting under pressure and freezing again when the pressure is reduced is known as  a. sublimation  b. condensation  c. deposition  d. regelation

Last Answer : regelation

What is known as the total heat and heat content at various times in the history?  a. enthalpy  b. entropy  c. internal energy  d. latent heat

Description : What is known as the total heat and heat content at various times in the history?  a. enthalpy  b. entropy  c. internal energy  d. latent heat

Last Answer : enthalpy

The value for the ΔU of a system is -120 J. If the system is known to have absorbed 420 J of heat, how much work was done?  a. -540 J  b. -640 J  c. -740 J  d. -840 J formula: ΔU = q +w

Description : The value for the ΔU of a system is -120 J. If the system is known to have absorbed 420 J of heat, how much work was done?  a. -540 J  b. -640 J  c. -740 J  d. -840 J formula: ΔU = q +w

Last Answer : -540 J

If any external pressure is applied to a confined fluid, the pressure will be increased at every point in the fluid by the amount of the external pressure is known as _________.  a. Torricelli’s law  b. Barometric law  c. Newton’s Second law  d. Pascal’s law

Description : If any external pressure is applied to a confined fluid, the pressure will be increased at every point in the fluid by the amount of the external pressure is known as _________.  a. Torricelli’s law  b. Barometric law  c. Newton’s Second law  d. Pascal’s law

Last Answer : Pascal’s law

Open system is also known as _________.  a. isolated system  b. closed container  c. control mass  d. control volume

Description : Open system is also known as _________.  a. isolated system  b. closed container  c. control mass  d. control volume

Last Answer : control volume

A closed system is also known as _________.  a. isolated system  b. closed container  c. control mass  d. control volume

Description : A closed system is also known as _________.  a. isolated system  b. closed container  c. control mass  d. control volume

Last Answer : control mass

The low temperature reservoir of the heat reservoirs is known as ______.  A. Source reservoir  B. Heel reservoir  C. Toe reservoir  D. Sink reservoir

Description : The low temperature reservoir of the heat reservoirs is known as ______.  A. Source reservoir  B. Heel reservoir  C. Toe reservoir  D. Sink reservoir

Last Answer : Sink reservoir

“The total volume of a mixture of non-reacting gases is equal to the sum of the partial volumes.” This statement is known as ______.  A. Law of Dulong and Petit  B. Maxwell-Boltzmann law  C. Amagat’s law  D. Avogadro’s law

Description : “The total volume of a mixture of non-reacting gases is equal to the sum of the partial volumes.” This statement is known as ______.  A. Law of Dulong and Petit  B. Maxwell-Boltzmann law  C. Amagat’s law  D. Avogadro’s law

Last Answer : Amagat’s law

“At constant pressure, the volume of a gas is inversely proportional to the pressure”. This is known as ______.  A. Boyle’s Law  B. Charles’s Law  C. Gay-Lussac Law  D. Ideal gas law

Description : “At constant pressure, the volume of a gas is inversely proportional to the pressure”. This is known as ______.  A. Boyle’s Law  B. Charles’s Law  C. Gay-Lussac Law  D. Ideal gas law

Last Answer : Boyle’s Law

“The entropy change of a system during a process is equal to the net entropy transfer through the system boundary and the entropy generated within the system”. This statement is known as:  A. Entropy generation  B. Entropy change of a system  C. Entropy balance relation  D. Third law of thermodynamics

Description : The entropy change of a system during a process is equal to the net entropy transfer through the system boundary and the entropy generated within the system . This statement is known as:  A. Entropy ...  B. Entropy change of a system  C. Entropy balance relation  D. Third law of thermodynamics

Last Answer : Entropy balance relation

Carnot cycle is the best known reversible cycle which was first proposed in what year?  A. 1842  B. 1824  C. 1832  D. 1834

Description : Carnot cycle is the best known reversible cycle which was first proposed in what year?  A. 1842  B. 1824  C. 1832  D. 1834

Last Answer : 1824

A device that violates either the first law of thermodynamics or the second law of thermodynamics is known as _____.  A. Ambiguous machine  B. Universal machine  C. Perpetual-motion machine  D. Unique machine

Description : A device that violates either the first law of thermodynamics or the second law of thermodynamics is known as _____.  A. Ambiguous machine  B. Universal machine  C. Perpetual-motion machine  D. Unique machine

Last Answer : Perpetual-motion machine

The equation Ein – Eout = E∆ system is known as ______.  A. Energy conservation  B. Energy equation  C. Energy balance  D. Energy conversion equation

Description : The equation Ein – Eout = E∆ system is known as ______.  A. Energy conservation  B. Energy equation  C. Energy balance  D. Energy conversion equation

Last Answer : Energy balance

What is sometimes known as the “Fourth-power law”?  A. Kirchhoff’s radiation law  B. Newton’s law of cooling  C. Stefan-Boltzmann law  D. Hess’s law

Description : What is sometimes known as the “Fourth-power law”?  A. Kirchhoff’s radiation law  B. Newton’s law of cooling  C. Stefan-Boltzmann law  D. Hess’s law

Last Answer : Stefan-Boltzmann law

The mass of one mole of a substance in grams is known as ______.  A. Molar weight  B. Molar mass  C. Molar volume  D. Molar constant

Description : The mass of one mole of a substance in grams is known as ______.  A. Molar weight  B. Molar mass  C. Molar volume  D. Molar constant

Last Answer : Molar mass

In the equation Pv = RT, the constant of proportionality R is known as ______.  A. Universal gas constant  B. Gas constant  C. Ideal gas factor  D. Gas index

Description : In the equation Pv = RT, the constant of proportionality R is known as ______.  A. Universal gas constant  B. Gas constant  C. Ideal gas factor  D. Gas index

Last Answer : Gas constant

A substance that has a fixed chemical composition is known as ______ substance.  A. Monoatomic  B. Heterogeneous  C. Homogeneous  D. Pure

Description : A substance that has a fixed chemical composition is known as ______ substance.  A. Monoatomic  B. Heterogeneous  C. Homogeneous  D. Pure

Last Answer : Pure

“The enthalpy change for any chemical reaction is independent of the intermediate stages, provided the initial and final conditions are the same for each route.” This statement is known as:

Description : “The enthalpy change for any chemical reaction is independent of the intermediate stages, provided the initial and final conditions are the same for each route.” This statement is known as:  A. Dulong’s Law  B. Dalton’s Law  C. Hess’s Law  D. Petit Law

Last Answer : Hess’s Law

“The state of a simple compressible system is completely specified by two independent, intensive properties”. This is known as ______.  A. Equilibrium postulate  B. State postulate  C. Environment postulate  D. Compressible system postulate

Description : “The state of a simple compressible system is completely specified by two independent, intensive properties”. This is known as ______.  A. Equilibrium postulate  B. State postulate  C. Environment postulate  D. Compressible system postulate

Last Answer : State postulate

A system in which there is a flow of mass is known as _____.  A. Equilibrium system  B. Isolated system  C. Open system  D. Closed system

Description : A system in which there is a flow of mass is known as _____.  A. Equilibrium system  B. Isolated system  C. Open system  D. Closed system

Last Answer : Open system

The measurement of a thermodynamic property known as temperature is based on  A. Zeroth law of thermodynamics  B. First law of thermodynamics  C. Second law of thermodynamics  D. none of these

Description : The measurement of a thermodynamic property known as temperature is based on  A. Zeroth law of thermodynamics  B. First law of thermodynamics  C. Second law of thermodynamics  D. none of these

Last Answer : Answer: A

Otto cycle is also known as  A. constant pressure cycle  B. constant volume cycle  C. constant temperature cycle  D. constant temperature and pressure cycle

Description : Otto cycle is also known as  A. constant pressure cycle  B. constant volume cycle  C. constant temperature cycle  D. constant temperature and pressure cycle

Last Answer : Answer: B

The absolute pressure of a given mass of a perfect gas varies inversely as its volume, when the temperature remains constant. This statement is known as Charles’ law.  A. Yes  B. No

Description : The absolute pressure of a given mass of a perfect gas varies inversely as its volume, when the temperature remains constant. This statement is known as Charles’ law.  A. Yes  B. No

Last Answer : Answer: B

The total energy of a molecule is shared equally by the various degrees of freedom possessed by it. This law is known as  A. law of equipartition of energy  B. law of conservation of energy  C. law of degradation of energy  D. none of these

Description : The total energy of a molecule is shared equally by the various degrees of freedom possessed by it. This law is known as  A. law of equipartition of energy  B. law of conservation of energy  C. law of degradation of energy  D. none of these

Last Answer : Answer: A

The sum of internal energy (U) and the product of pressure and volume (p.v) is known as  A. workdone  B. entropy  C. enthalpy  D. none of these

Description : The sum of internal energy (U) and the product of pressure and volume (p.v) is known as  A. workdone  B. entropy  C. enthalpy  D. none of these

Last Answer : Answer: C

A series of operations, which takes place in a certain order and restore the initial conditions at the end, is known as  A. reversible cycle  B. irreversible cycle  C. thermodynamic cycle  D. none of these

Description : A series of operations, which takes place in a certain order and restore the initial conditions at the end, is known as  A. reversible cycle  B. irreversible cycle  C. thermodynamic cycle  D. none of these

Last Answer : Answer: C

When coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel, the process is known as __________ of fuel.  A. atomisation  B. carbonisation

Description : When coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel, the process is known as __________ of fuel.  A. atomisation  B. carbonisation

Last Answer : Answer: B

The processes occuring in open system which permit the transfer of mass to and from the system, are known as  A.flow processes  B.non-flow processes  C.adiabatic processes  D.none of these

Description : The processes occuring in open system which permit the transfer of mass to and from the system, are known as  A.flow processes  B.non-flow processes  C.adiabatic processes  D.none of these

Last Answer : Answer: A

A cycle consisting of one constant pressure, one constant volume and two isentropic processes is known as  A.Carnot cycle  B.Stirling cycle  C.Otto cycle  D.Diesel cycle

Description : A cycle consisting of one constant pressure, one constant volume and two isentropic processes is known as  A.Carnot cycle  B.Stirling cycle  C.Otto cycle  D.Diesel cycle

Last Answer : Answer: D

The cycle in which heat is supplied at constant volume and rejected at constant pressure is known as

Description : The cycle in which heat is supplied at constant volume and rejected at constant pressure is known as  (a) Dual combustion cycle  (b) Diesel cycle  (c) Atkinson cycle  (d) Rankine cycle  (e) Stirling cycle.

Last Answer : Answer : c

A cycle consisting of two adiabatics and two constant pressure processes is known as  (a) Otto cycle  (b) Ericsson cycle  (c) Joule cycle  (d) Stirling cycle  (e) Atkinson cycle.

Description : A cycle consisting of two adiabatics and two constant pressure processes is known as  (a) Otto cycle  (b) Ericsson cycle  (c) Joule cycle  (d) Stirling cycle  (e) Atkinson cycle.

Last Answer : Answer : c

Total heat of a substance is also known as  (a) internal energy  (b) entropy  (c) thermal capacity  (d) enthalpy  (e) thermal conductance.

Description : Total heat of a substance is also known as  (a) internal energy  (b) entropy  (c) thermal capacity  (d) enthalpy  (e) thermal conductance.

Last Answer : Answer : d

If a gas vapour is allowed to expand through a very minute aperture, then such a process is known as  (a) free expansion  (b) hyperbolic expansion  (c) adiabatic expansion  (d) parabolic expansion  (e) throttling.

Description : If a gas vapour is allowed to expand through a very minute aperture, then such a process is known as  (a) free expansion  (b) hyperbolic expansion  (c) adiabatic expansion  (d) parabolic expansion  (e) throttling.

Last Answer : Answer : e

A heat exchange process in which the product of pressure and volume remains constant is known as  (a) heat exchange process  (b) throttling process  (c) isentropic process  (d) adiabatic process  (e) hyperbolic process.

Description : A heat exchange process in which the product of pressure and volume remains constant is known as  (a) heat exchange process  (b) throttling process  (c) isentropic process  (d) adiabatic process  (e) hyperbolic process.

Last Answer : Answer : e

If value of n is infinitely large in a polytropic process pV” = C, then the process is known as constant  (a) volume  (b) pressure  (c) temperature  (d) enthalpy  (e) entropy

Description : If value of n is infinitely large in a polytropic process pV” = C, then the process is known as constant  (a) volume  (b) pressure  (c) temperature  (d) enthalpy  (e) entropy

Last Answer : Answer : a

The statement that molecular weights of all gases occupy the same volume is known as  (a) Avogadro’s hypothesis  (b) Dalton’s law  (c) Gas law  (d) Law of thermodynamics  (e) Joule’s law.

Description : The statement that molecular weights of all gases occupy the same volume is known as  (a) Avogadro’s hypothesis  (b) Dalton’s law  (c) Gas law  (d) Law of thermodynamics  (e) Joule’s law.

Last Answer : Answer : a

In centrifugal pump operation, the cavitation can be eliminated by maintaining suction pressure __________ the vapor pressure of the liquid at the suction temperature. (A) Lower than (B) Higher than (C) Equal to (D) None of these

Description : In centrifugal pump operation, the cavitation can be eliminated by maintaining suction pressure __________ the vapor pressure of the liquid at the suction temperature. (A) Lower than (B) Higher than (C) Equal to (D) None of these

Last Answer : (B) Higher than

What Is The Function Of Forebay?

Description : What Is The Function Of Forebay?

Last Answer : Forebay is considered as naturally provided surge tank. It is temporary water storage when the load on the plant is reduced and provides water for initial increment on increasing load.

What Is The Use Of Surge Tank?

Description : What Is The Use Of Surge Tank?

Last Answer : The surge tank is used to provide better regulation of water pressure in the system. The surge tank controls the water when the load on the turbine decreases and supplies water when the ... variations resulting from the rapid changes in water flow in penstock and hence prevents water hammer.

Why Trash Rack Is Used?

Description : Why Trash Rack Is Used?

Last Answer : The trash rack is used to prevent the entry of debris, which might damage the turbine runners and chock up the nozzle of impulse turbine.

What Is The Main Purpose Of The Dam?

Description : What Is The Main Purpose Of The Dam?

Last Answer : The main purpose of the dam is to increase the height of water level and also to increase the working head of the hydraulic power plant.

What Is The Main Purpose Of The Reservoir?

Description : What Is The Main Purpose Of The Reservoir?

Last Answer : The main purpose of reservoir is to store water received from catchments areas during the rainy seasons and supply the same during the dry season.

What Consists Of Cooling Water Circuit And Coal & Ash Circuit In Steam Power Plant?

Description : What Consists Of Cooling Water Circuit And Coal & Ash Circuit In Steam Power Plant?

Last Answer : The cooling water circuit consists of a pump, condenser and cooling tower. The coal and ash circuit consists of coal delivery, preparation of coal, handling of coal to the boiler furnace, ash handling and ash storage.

What Consists Of Feed Water And Steam Flow Circuit In Steam Power?

Description : What Consists Of Feed Water And Steam Flow Circuit In Steam Power?

Last Answer : The feed water and steam flow circuit consists of feed pump, economizer boiler drum super heater, turbine and condenser.

What Consists Of Air And Flue Gas Circuit?

Description : What Consists Of Air And Flue Gas Circuit?

Last Answer : Air and flue gas circuit consists of forced draught fan, air preheater, boiler, furnace, superheater, economizer, dust collector, induced draught fan and chimney.

Name The Four Major Circuits In Steam Power Plant?

Description : Name The Four Major Circuits In Steam Power Plant?

Last Answer :  Coal and ash circuit  Air and flue gas circuit  Feed water and steam circuit  Cooling water circuit

What Is Ductile-brittle Transition Temperature?

Description : What Is Ductile-brittle Transition Temperature?

Last Answer : It is the temperature below which the tendency of a material to fracture increases rather than forming. Below this temperature the material loses its ductility. It is also called Nil Ductility Temperature