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First law of thermodynam..



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Q1. What reaction takes place during photosynthesis?

(a) Exothermic reaction
(b) Endothermic reaction
(c) Redox reaction
(d) Combustion reaction

Q2. Which among this is not an exothermic reaction?

(a) Combustion reaction
(b) Neutralization reaction
(c) Thermite reaction
(d) Evaporating liquid water

Q3. SI unit of enthalpy is_______

(a) Joule/kgK
(b) Joule/K
(c) Joule/kg
(d) K/kg

Q4. What is the equation of entropy?

(a) Ratio of reversible transfer of heat to absolute temperature
(b) Ratio of absolute temperature to reversible heat transfer
(c) Ratio of adiabatic heat to macroscopic variables
(d) Ratio of macroscopic variables to adiabatic heat

Q5. Entropy occurs due to _______

(a) Change in macroscopic variables
(b) Volumetric changes only
(c) Mass changes only
(d) Temperature only

Q6. An increase in enthalpy leads to an increase in __________

(a) Increase in pressure
(b) Increase in volume
(c) Increase in internal energy
(d) Increase in mass

Q7. The equation for the average kinetic energy is_________

(a) 0.5 KT
(b) 1.5 KT
(c) 2.5 KT
(d) 3.5 KT

Q8. During a fluid flow, the temperature is developed due to________

(a) Increase in density
(b) Change in pressure
(c) Translational Kinetic Energy
(d) Fluid level

Q9. Equation of the first law of thermodynamics is ________

(a) Internal Energy= Heat added into work done
(b) Internal Energy= Heat rejected into work done
(c) Internal Energy= Heat added divided by work done
(d) Internal Energy=Heat added plus work done

Q10. First law of thermodynamics deals with _______

(a) Conservation of mass
(b) Conservation of momentum
(c) Conservation of energy
(d) Conservation of pressure


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The Relation Between H And U Is

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A Well Stoppered Thermos Flask Contains Some Ice Cubes. This Is An Example Of A

Modified 243 Year Ago Bhavna

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243 Year Ago

A Well Stoppered Thermos Flask Contains Some Ice Cubes. This Is An Example Of A

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Three Moles Of An Ideal Gas Expanded Spontaneously Into Vacuum. The Work Done Will Be

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Three Moles Of An Ideal Gas Expanded Spontaneously Into Vacuum. The Work Done Will Be

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In Order To Decompose 9 G Water 142.5 KJ Heat Is Required. Hence, The Enthalpy Of Formation Of Water Is

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In Order To Decompose 9 G Water 142.5 KJ Heat Is Required. Hence, The Enthalpy Of Formation Of Water Is

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353 views

Changes In A System From An Initial State To The Final State Were Made By A Different Manner That ΔH Remains Same But Q Changes Because

Modified 243 Year Ago

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If W Is The Amount Of Work Done By The System And Q Is The Amount Of Heat Supplied To The System. Identify The Type Of The System

Modified 243 Year Ago

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If W Is The Amount Of Work Done By The System And Q Is The Amount Of Heat Supplied To The System. Identify The Type Of The System

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