JEE Main & Advanced Chemistry Thermodynamics / रासायनिक उष्मागतिकी Question Bank

done Topic Test - Thermodynamics and Thermochemistry (8-5-21) Total Questions - 40

• question_answer1)
  Any series of operations so carried out that at the end, the system is back to its initial state is called
  A)
  Boyle's cycle done clear
  B)
  Reversible process done clear
  C)
  Adiabatic process done clear
  D)
  Cyclic process done clear
  View Solution play_arrow

• question_answer2)
  Energy equivalent to one erg, one joule and one calorie is in the order
  A)
  \[1\,erg\,>\,1\,joule\,>\,1\,calorie\]            done clear
  B)
  \[1\,erg\,>\,1\,calorie\,>\,1\,joule\] done clear
  C)
  \[1\,calorie\,>\,1\,joule\,>\,1\,erg\] done clear
  D)
  \[1\,joule\,>\,1\,calorie\,>\,1\,erg\] done clear
  View Solution play_arrow

• question_answer3)
  In thermodynamics which one of the following is not an intensive property     
  A)
  Pressure done clear
  B)
  Density done clear
  C)
  Volume done clear
  D)
  Temperature done clear
  View Solution play_arrow

• question_answer4)
  At constant T and P, which one of the following statements is correct for the reaction, \[CO(g)+\frac{1}{2}{{O}_{2}}(g)\to C{{O}_{2}}(g)\]
  A)
  \[\Delta H\] is independent of the physical state of the reactants of that compound done clear
  B)
  \[\Delta H\,>\,\Delta E\] done clear
  C)
  \[\Delta H\,<\,\Delta E\] done clear
  D)
  \[\Delta H=\Delta E\] done clear
  View Solution play_arrow

• question_answer5)
  Which of the following expressions represents the first law of thermodynamics
  A)
  \[\Delta E=-q+W\] done clear
  B)
  \[\Delta E=q-W\] done clear
  C)
  \[\Delta E=q+W\] done clear
  D)
  \[\Delta E=-q-W\] done clear
  View Solution play_arrow

• question_answer6)
  According to Hess’s law, the heat of reaction depends upon
  A)
  Initial condition of reactants done clear
  B)
  Initial and final conditions of reactants done clear
  C)
  Intermediate path of the reaction done clear
  D)
  End conditions of reactants done clear
  View Solution play_arrow

• question_answer7)
  Internal energy is 
  A)
  Partly potential and partly kinetic done clear
  B)
  Totally kinetic done clear
  C)
  Totally potential done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer8)
  Which of the following is zero during adiabatic expansion of the gas
  A)
  \[\Delta T\] done clear
  B)
  \[\Delta S\] done clear
  C)
  \[\Delta E\] done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer9)
  When the value of entropy is greater, then the ability of work
  A)
  Is maximum done clear
  B)
  Is minimum done clear
  C)
  Is medium done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer10)
  The volume of a gas decreases from \[500\,cc\] to \[300\,cc\] when a sample of gas is compressed by an average pressure of 0.6 atm. During this process 10 J of heat is liberated. The change in internal energy is
  A)
   - 2.16 J done clear
  B)
  12.156 J done clear
  C)
  2.16 J done clear
  D)
  101.3 J done clear
  View Solution play_arrow

• question_answer11)
  For a carnot engine, the source is at \[500K\] and the sink at \[300K\]. What is efficiency of this engine
  A)
  0.2 done clear
  B)
  0.4 done clear
  C)
  0.6 done clear
  D)
  0.3 done clear
  View Solution play_arrow

• question_answer12)

  The heat evolved in the combustion of benzene is given by

  \[{{C}_{6}}{{H}_{6}}+7\frac{1}{2}{{O}_{2}}\to 6C{{O}_{2}}(g)+3{{H}_{2}}O(l);\,\Delta H=-3264.6\,kJ\]

  Which of the following quantities of heat energy will be evolved when \[39\,g\,{{C}_{6}}{{H}_{6}}\] are burnt

  A)
  816.15 kJ done clear
  B)
  1632.3 kJ done clear
  C)
  6528.2 kJ done clear
  D)
  2448.45 kJ done clear
  View Solution play_arrow

• question_answer13)
  The enthalpy of neutralization is about 57.3 kJ for the pair
  A)
  \[HCl\] and \[N{{H}_{4}}OH\] done clear
  B)
  \[N{{H}_{4}}OH\] and \[HN{{O}_{3}}\] done clear
  C)
  \[HCl\] and \[NaOH\] done clear
  D)
  \[C{{H}_{3}}COOH\] and \[NaOH\] done clear
  View Solution play_arrow

• question_answer14)
  The heat change for the reaction \[{{H}_{2}}+\frac{1}{2}{{O}_{2}}\to {{H}_{2}}O\] is called
  A)
  Heat of reaction done clear
  B)
  Heat of formation done clear
  C)
  Heat of vaporisation done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer15)
  The heat of combustion of \[C{{H}_{4(g)}},\,{{C}_{(\text{graphite})}}\] and \[{{H}_{2(g)}}\] are \[20\,kcal,\,-40\,kcal\] and \[-10\,kcal\] respectively. The heat of formation of methane is
  A)
  \[-4.0\,kcal\] done clear
  B)
  \[+40\,kcal\] done clear
  C)
  \[-80\,kcal\] done clear
  D)
  \[+80\,kcal\] done clear
  View Solution play_arrow

• question_answer16)
  Values of heats of formation for \[Si{{O}_{2}}\]and \[MgO\] are \[-48.4\] and \[-34.7\,kJ\] respectively. The heat of the reaction \[2Mg+Si{{O}_{2}}\to 2MgO+Si\] is
  A)
  \[21.16\,kJ\] done clear
  B)
  \[-21.10\,kJ\] done clear
  C)
  \[-13.62\,kJ\] done clear
  D)
  \[13.6\,kJ\] done clear
  View Solution play_arrow

• question_answer17)
  In an endothermic reaction, the value of \[\Delta H\] is
  A)
  Zero done clear
  B)
  Positive done clear
  C)
  Negative done clear
  D)
  Constant done clear
  View Solution play_arrow

• question_answer18)

  Combustion of glucose takes place according to the equation,

  \[{{C}_{6}}{{H}_{12}}{{O}_{6}}+6{{O}_{2}}\to 6C{{O}_{2}}+6{{H}_{2}}O\],\[\Delta H=-72\,kcal\].

  How much energy will be required for the production of 1.6 g of glucose (Molecular mass of glucose = 180 g)

  A)
  0.064 kcal done clear
  B)
  0.64 kcal done clear
  C)
  6.4 kcal done clear
  D)
  64 kcal done clear
  View Solution play_arrow

• question_answer19)

  The following thermochemical reactions are given

  \[M+\frac{1}{2}{{O}_{2}}\,\,\to \,\,MO+351.4\,kJ\]

  \[X+\frac{1}{2}{{O}_{2}}\,\,\to \,\,XO+90.8\,kJ\]

  It follows that the heat of reaction for the following process \[M+XO\] \[\rightleftharpoons \] \[MO+X\] is given by

  A)
  422.2 kJ done clear
  B)
  268.7 kJ. done clear
  C)
  - 442.2 kJ done clear
  D)
  260.6 kJ             done clear
  View Solution play_arrow

• question_answer20)
  One gram sample of \[N{{H}_{4}}N{{O}_{3}}\] is decomposed in a bomb calorimeter. The temperature of the calorimeter increases by 6.12 K the heat capacity of the system is 1.23 kJ/g/deg. What is the molar heat of decomposition for \[N{{H}_{4}}N{{O}_{3}}\]
  A)
  - 7.53 kJ/mol done clear
  B)
  - 398.1 kJ/mol done clear
  C)
  - 16.1 kJ/mol      done clear
  D)
  - 602 kJ/mol done clear
  View Solution play_arrow

• question_answer21)
  The bond dissociation energy needed to form benzyl radical from toluene is ..... than the formation of the methyl radical from methane
  A)
  Less      done clear
  B)
  Much done clear
  C)
  Equal done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer22)
  The \[H-H\] bond energy is 430 kJ \[mol\] and \[Cl-Cl\] bond energy is \[240\,kJ\,mo{{l}^{-1}}.\,\,\Delta H\] for \[HCl\] is \[-90\,kJ\]. The \[H-Cl\] bond energy is about
  A)
  \[180\,kJ\,mo{{l}^{-1}}\] done clear
  B)
  \[360\,kJ\,mo{{l}^{-1}}\] done clear
  C)
  \[213\,kJ\,mo{{l}^{-1}}\] done clear
  D)
  \[425\,kJ\,mo{{l}^{-1}}\] done clear
  View Solution play_arrow

• question_answer23)
  The relation between \[\Delta G\] and \[\Delta H\] is
  A)
  \[\Delta H=\Delta G-T\,\Delta S\] done clear
  B)
  \[\Delta G=\Delta H-T\,\Delta S\] done clear
  C)
  \[T\,\Delta S-\Delta G=\Delta H\] done clear
  D)
  \[\Delta H=T\,\Delta G+\Delta S\] done clear
  View Solution play_arrow

• question_answer24)
  In an irreversible process taking place at constant T and P and in which only pressure-volume work is being done, the change in Gibbs free energy \[(dG)\] and change in entropy \[(dS)\], satisfy the criteria   
  A)
  \[{{(dS)}_{V,\,E}}<0,\,{{(dG)}_{T,\,P}}<0\] done clear
  B)
  \[{{(dS)}_{V,\,E}}>0,\,{{(dG)}_{T,\,P}}<0\] done clear
  C)
  \[{{(dS)}_{V,\,E}}=0,\,{{(dG)}_{T,\,P}}=0\] done clear
  D)
  \[{{(dS)}_{V,\,E}}=0,\,{{(dG)}_{T,\,P}}>0\] done clear
  View Solution play_arrow

• question_answer25)
  Gibb’s free energy \[(G)\] is defined as       
  A)
  \[\Delta G=\Delta H-T\Delta S\] done clear
  B)
  \[\Delta G=\Delta H+\frac{T}{\Delta S}\] done clear
  C)
  \[\Delta H=\Delta G-T\Delta S\] done clear
  D)
  \[\Delta G=\Delta H+T.{{C}_{p}}\] done clear
  View Solution play_arrow

• question_answer26)
  For spontaneity of a cell, which is correct
  A)
  \[\Delta G=0,\,\Delta E=0\] done clear
  B)
  \[\Delta G=-ve,\,\Delta E=0\] done clear
  C)
   \[\Delta G=+ve,\,\Delta E=+ve\] done clear
  D)
  \[\Delta G=-ve,\,\Delta E=+ve\] done clear
  View Solution play_arrow

• question_answer27)
  If a refrigerator's door is opened, then we get
  A)
  Room heated done clear
  B)
  Room cooled done clear
  C)
  More amount of heat is passed out done clear
  D)
  No effect on room done clear
  View Solution play_arrow

• question_answer28)
  Which of the following is not a state function
  A)
  Internal energy done clear
  B)
  Enthalpy done clear
  C)
  Work done clear
  D)
  Entropy done clear
  View Solution play_arrow

• question_answer29)
  Hess's law of constant heat summation in based on
  A)
  \[E=m{{c}^{2}}\] done clear
  B)
  Conservation of mass done clear
  C)
  First law of thermodynamics done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer30)
  Joule-Thomson expansion is
  A)
  Isobaric done clear
  B)
  Isoenthalpic done clear
  C)
  Isothermal done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer31)
  At \[{{27}^{o}}C,\] one mole of an ideal gas is compressed isothermally and reversibly from a pressure of 2 atm to 10 atm. The values of \[\Delta E\] and q are \[(R=2)\]        
  A)
  0, - 965.84 cal done clear
  B)
  - 965.84 cal, + 965.84 cal done clear
  C)
  + 865.58 cal, - 865.58 cal done clear
  D)
  - 865.58 cal, - 865.58 cal done clear
  View Solution play_arrow

• question_answer32)
  \[2C+{{O}_{2}}\to 2CO;\,\,\Delta H=-220\,kJ\] Which of the following statement is correct for this reaction
  A)
  Heat of combustion of carbon is 110 kJ done clear
  B)
  Reaction is exothermic done clear
  C)
  Reaction needs no initiation done clear
  D)
  All of these are correct done clear
  View Solution play_arrow

• question_answer33)
  When disorder of a system increases, the change is said to be
  A)
  Exothermic done clear
  B)
  Non-spontaneous done clear
  C)
  Endothermic done clear
  D)
  Spontaneous done clear
  View Solution play_arrow

• question_answer34)
  The enthalpy change for the transition of liquid water to steam, \[\Delta {{H}_{vap}}=37.3\,kJ\,mo{{l}^{-1}}\] at \[373\,K\]. The entropy change for the process is        
  A)
  \[111.9\,J\,mo{{l}^{-1}}{{K}^{-1}}\] done clear
  B)
  \[37.3\,J\,mo{{l}^{-1}}\,{{K}^{-1}}\] done clear
  C)
  \[100\,J\,mo{{l}^{-1}}{{K}^{-1}}\] done clear
  D)
  \[74.6\,J\,mo{{l}^{-1}}{{K}^{-1}}\] done clear
  View Solution play_arrow

• question_answer35)
  One mole of an ideal gas is allowed to expand reversibly and adiabatically from a temperature of \[{{27}^{o}}C\]. If the work done during the process is 3 kJ, the final temperature will be equal to \[({{C}_{v}}=20\,J{{K}^{-1}})\]
  A)
  150 K done clear
  B)
  100 K done clear
  C)
  \[{{26.85}^{o}}C\] done clear
  D)
  295 K done clear
  View Solution play_arrow

• question_answer36)
  The molar heat capacity of water at constant pressure is \[75\,\,J{{K}^{-1}}mo{{l}^{-1}}\]. When 1.0 kJ of heat is supplied to 100 g of water which is free to expand the increase in temperature of water is
  A)
  6.6 K done clear
  B)
  1.2 K done clear
  C)
  2.4 K done clear
  D)
  4.8 K done clear
  View Solution play_arrow

• question_answer37)
  The enthalpy of vapourization of a liquid is \[30\,kJ\,mo{{l}^{-1}}\] and entropy of vapourization is \[75\,J\,mo{{l}^{-1}}K\]. The boiling point of the liquid at 1 atm is  
  A)
  250K0 done clear
  B)
  400K done clear
  C)
  450K done clear
  D)
  600K done clear
  View Solution play_arrow

• question_answer38)
  An endothermic reaction is one in which
  A)
  Heat is converted into electricity done clear
  B)
  Heat is absorbed done clear
  C)
  Heat is evolved done clear
  D)
  Heat is converted into mechanical work done clear
  View Solution play_arrow

• question_answer39)
  Heat of neutralisation for the given reaction \[NaOH+HCl\to NaCl+{{H}_{2}}O\] is \[57.1\,kJ\,mo{{l}^{-1}}\]. What will be the heat released when \[0.25\,mole\] of \[NaOH\] is titrated against \[0.25\,mole\] of \[HCl\]
  A)
  \[22.5\,kJ\,mo{{l}^{-1}}\] done clear
  B)
  \[57.1\,kJ\,mo{{l}^{-1}}\] done clear
  C)
  \[14.3\,kJ\,mo{{l}^{-1}}\] done clear
  D)
  \[28.6\,kJ\,mo{{l}^{-1}}\] done clear
  View Solution play_arrow

• question_answer40)
  For the reaction \[A(g)+2B(g)\to 2C(g)+3D(g)\], the value of \[\Delta E\] at \[{{27}^{o}}C\] is 19.0 kcal. The value of \[\Delta H\] for the reaction would be \[(R=2.0\,cal\,{{K}^{-1}}mo{{l}^{-1}})\]
  A)
  20.8 kcal done clear
  B)
  19.8 kcal done clear
  C)
  18.8 kcal done clear
  D)
  20.2 kcal done clear
  View Solution play_arrow