Practice Test

Q1) Which of the following is not an intensive property? Show Answer

Q2) In a bomb calorimeter, the heat of reaction is measured at Show Answer

Q3) If temperature remains constant during the process, it is called an Show Answer

Q4) The entropy of the universe Show Answer

Q5) Which of the following enthalpies is always negative? Show Answer

Q6) Which of the following has highest entropy? Show Answer

Q7) Entropy change for an adiabatic reversible process is Show Answer

Q8) The temperature of the system decreases in an Show Answer

Q9) Thermodynamic equilibrium involves Show Answer

Q10) The enthalpies of elements in their standard state are taken as zero. Hence the enthalpy of formation of a compound Show Answer

Q11) When potassium chloride is dissolved in water Show Answer

Q12) According to third law of thermodynamics, the entrophy of crystalline substances at absolute zero is taken as Show Answer

Q13) All the naturally occurring processes proceed spontaneously in a direction which leads to Show Answer

Q14) Free energy, G may be defined as Show Answer

Q15) When a solid changes into liquid, the entropy Show Answer

Q16) Entropy is a measure of Show Answer

Q17) When a solid is converted directly into gaseous state , the process is called sublimation. The entropy change during the process is Show Answer

Q18) Which of the following processes is accompanied by decrease in entropy? Show Answer

Q19) A spontaneous change in one in which the system suffers. Show Answer

Q20) If there is no exchange of heat between the system and the surrounding during the process. It is called Show Answer

Q21) An endothermic reaction is allowed to occur very rapidly in the air. The temperature of the surrounding air Show Answer

Q22) Which of the following is not an intensive property? Show Answer

Q23) Which of the following is not a state function? Show Answer

Q24) Which of the following modes of energy constitutes both kinetic energy and potential energy? Show Answer

Q25) Which of the following gases has the highest heat of combution? Show Answer

Q26) The energy of molecular motion appears in the form of Show Answer

Q27) The enthalpies of formation of organic substances are conveniently determined from Show Answer

Q28) Two objects are said to be in thermal equilibrium if they have same Show Answer

Q29) An isolated system is that system in which Show Answer

Q30) The entropy of a perfect crystalline solid at absolute zero is Show Answer

Q31) Variation of heat of reaction with temperature is known as Show Answer

Q32) The free energy change for a reaction is zero when Show Answer

Q33) The enthalpy of formation of two compounds A and B are -84kJ and -156kJ respectively. Which one of the following statements is correct? Show Answer

Q34) The change in entropy of an ideal gas during a reversible isothermal expansion is Show Answer

Q35) In which case of mixing of a strong acid and a strong base each of 1 M concentration, temperature increase is highest? Show Answer

Q36) Which of the following is not an endothermic reaction? Show Answer

Q37) In thermodynamics, a process is called reversible when Show Answer

Q38) Which of the following statements is false? Show Answer

Q39) The enthalpy change for a reaction does not depend upon Show Answer

Q40) Identify the correct statement regarding a spontaneous process Show Answer

Q41) In an exothermic reaction, the reactants Show Answer

Q42) The variation of heat of reaction with temperature is given by an equation known as
Show Answer

Q43) In an endothermic reaction Show Answer

Q44) An adiabatic process is one in which Show Answer

Q45) Which of the following processes is not accompanied by increase of entropy? Show Answer

Q46) Which of the following conditions is not favourable for the feasibility of a process? Show Answer

Q47) In which of the following cases, the reaction is spontaneous at all temperatures? Show Answer

Q48) In an adiabatic expansion of an ideal gas Show Answer

Q49) Which of the following reaction represents enthalpy of formation of AgCl? Show Answer

Q50) For a reversible process at equilibrium, the change in entropy may be expressed as Show Answer

Q51) Free energy is related to enthalpy and entropy changes as Show Answer

Q52) For an equilibrium state. Show Answer

Q53) Which of the following neutralisation reactions is most exothermic? Show Answer

Q54) Which of the following equations represents standard heat of formation of methane? Show Answer

Q55) The units of entropy are Show Answer

Q56) Which of the following quantities is not a state function? Show Answer

Q57) In an isothermal expansion of an ideal gas Show Answer

Q58) For a spontaneous endothermic reaction Show Answer

Q59) The heat of combustion of yellow phosphorus and red phosphorus are -9.91 kJ and -8.78 kJ respectively. The heat of transition of yellow phosphorus to red phosphorus is Show Answer

Q60) For an ideal gas, the joule Thomson co-efficient is equal to Show Answer

Q61) The entalpies of combustion of some fuels are given below. Which of these has lowest efficiency as fuel per gram? Show Answer

Q62) Which of the following statements / relationships is not correct? Show Answer

Q63) When 1000 ml of a 1M solution of sulphuric acid is neutralised by a strong base in dilute solution. The standard enthalpy of neutralisation is Show Answer

Q64) Which of the following salts will have maximum cooling effect when 0.5 mole of the salt is dissolved in same amount of water. Integral heat of solution at 298 K is given for each salt? Show Answer

Q65) Which of the following properties of a system undergoing change at a constant temperature and pressure is a measure of the maximum useful work that the system can do? Show Answer

Q66) Which of the following values of heat of formation indicates that the product is least stable? Show Answer

Q67) In which of the following neutralisation reaction. the heat of neutralisation will be highest? Show Answer

Q68) For a reaction to be spontaneous at all temperatures Show Answer

Q69) The enthalpy of neutralisation of any strong acid and strong base is nearly equal to Show Answer

Q70) For a reaction to occur spontaneously Show Answer

Q71) For n moles of an ideal gas Show Answer

Q72) Which of the following expressions is true? Show Answer

Q73) When an ideal gas is suddenly allowed to expand adiabatically into an evacuated container, then Show Answer

Q74) Molar heat capacity of water in equilibrium with ice at constant pressure is Show Answer

Q75) The bond energies of C - C, C = C, H- H and C - H linkages are 350, 600, 400 and 410 kJ per mol respectively. The heat of hydrogenation of ethylene is Show Answer

Q76) Two moles of an ideal gas is expanded isothermally and reversibly from 1 L to 10 L at 300 K. The enthalpy change (in kJ) for the process is Show Answer

Q77) For a reaction to proceed simultaneously. Show Answer

Q78) When 1 mole of a gas is heated at constant volume, temperature is raised from 298K to 308K. Heat supplied to the gas is 500J. Then which statement is correct Show Answer

Q79) If the system does not exchange heat with the surrounding, the process is Show Answer

Q80) Which of the following is an intensive property? Show Answer

Q81) System in which there is no exchange of matter work or energy with the surrounding is Show Answer

Q82) Considering entropy (s) as a thermodynamic parameter, the criterion for the spontaneity of any process is Show Answer

Q83) The enthalpy of a monoatomic gas at T kelvin is Show Answer

Q84) A reaction occurs spontaneously if Show Answer

Q85) Which of the following pairs of a chemical reaction is certain to result in a spontaneous reaction? Show Answer

Q86) Which of the following are not state functions?
(I) q + w
(II) q
(III) w
(IV) H - TS Show Answer

Q87) Thermodynamically the most stable from of carbon is Show Answer

Q88) Which of these species has a standard enthalpy of formation equal to zero? Show Answer

Q89) Which one of the following demonstrates a decrease in entropy? Show Answer

Q90) Which of the following is correct option for free expansion of an ideal gas under adiabatic condition? Show Answer

Q91) When an ideal gas is allowed to expand adiabatically into an evacuted vessel then Show Answer

Q92) A gas expands from 1.5 L to 6.5 L against a constant pressure of 0.5 atm and during this process, the gas also absorbs 100 J of heat. The change in internal energy is Show Answer

Q93) Which of the following is not true regarding entropy? Show Answer

Q94) the standard enthalpy of combustion of solid boron is equal to Show Answer

Q95) The state of maximum entropy for water is Show Answer

Q96) The net energy change in a reversible cyclic process is Show Answer

Q97) Which of the following set contain only all extensive or intensive properties? Show Answer

Q98) Which of the following statements is false? Show Answer

Q99) In thermodynamics, a process is called reversible when Show Answer

Q100) Which of the following expression is true? Show Answer

Q101) The total entropy change for a system and its surroundings increases, if the process is Show Answer

Q102) The change in entropy of an ideal gas during a reversible isothermal expansion is Show Answer

Q103) For which of the following reaction, the change in enthalpy is equal to change in internal energy? Show Answer

Q104) 4.6 g of iron combines with sulphur evolving 8.27 kJ. The heat of formation of iron sulphide is Show Answer

Q105) Which of the following statement is not correct? Show Answer

Q106) In which of the following, entropy decreases: Show Answer