Practice Test

Q1) Which of the following units respresent largest amount of energy ? Show Answer

Q2) Thermodynamic equilibrium involves Show Answer

Q3) In an adiabatic expansion of ideal gas Show Answer

Q4) The intensive property among these quantities is Show Answer

Q5) An adiabatic expansion of an ideal gas always has Show Answer

Q6) Mechanical work is specially important in system that contains Show Answer

Q7) System in which there is no exchange of matter, work or energy from surrounding is Show Answer

Q8) In thermodynamics which one of the following is not an intensive property ? Show Answer

Q9) A gas can expand from 100 mL to 250 mL under a constant prssure of 2 atm. The work done by gas is Show Answer

Q10) Identify the state quantity among the following Show Answer

Q11) 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 Show Answer

Q12) In thermodynamics, a process is called reversibly when Show Answer

Q13) Which of the following reaction corresponds to the definition of enthalpy of formation ? Show Answer

Q14) The heat change at constant volume for the decomposition of silver (I) oxide is found to be 30.66 kJ. The heat change at constant pressure will be Show Answer

Q15) In general, for exothermic reactions to be spontaneous Show Answer

Q16) The heat of neutralization is maximum when Show Answer

Q17) Heat of neutralization of a strong acid by a strong base is a constant value because Show Answer

Q18) Heat of combustion is always Show Answer

Q19) Evaporation of water is Show Answer

Q20) An endothermic reaction is one in which Show Answer

Q21) An exothermic reaction is one in which the reacting substances Show Answer

Q22) Heat of neutralisation of strong acid against strong base in constant and is equal to Show Answer

Q23) Hess's law deals with Show Answer

Q24) The law of Lavoisier and Laplace illustrates Show Answer

Q25) Heat capacity is Show Answer

Q26) Variation of heat of reaction with temperature is known as Show Answer

Q27) Compounds with high heat of formation are less stable because Show Answer

Q28) The heat absorbed at constant volume is equal to the system's change in Show Answer

Q29) If a reaction involves only solids and liquids, which of the following is true ? Show Answer

Q30) Enthalpy of an exothermic reaction is always Show Answer

Q31) Heat exchanged in a chemical reaction at constant temperature and pressure is called Show Answer

Q32) In order of decompose 9 g of water, 142.5 kJ of heat is required. Hence enthalpy of formation of water is Show Answer

Q33) Which of the following is not correct ? Show Answer

Q34) Enthalpy of formation HF and HCl is - 161 kJ and - 92 kJ respectively. Which of the following statements is incorrect ? Show Answer

Q35) Heat liberated when 100 mL of 1 N NaOH is neutralised by 300 mL of 1 N HCl. Show Answer

Q36) The heat required to raise the emperature of a body by 1 K is called Show Answer

Q37) The enthalpy change for a reaction does not depend upon Show Answer

Q38) Entropy change of the system and the surroundings in equilibrium Show Answer

Q39) Which of the following does not result in an increase in the entropy ? Show Answer

Q40) The unit of entropy is Show Answer

Q41) For a reversible reaction at temperature T, which of the following is correct ? Show Answer

Q42) For an isothermal, reversible expansion of an ideal gas Show Answer

Q43) Which of the following expressions is not correct? Show Answer

Q44) A particular reaction has a negative value for the free energy change. Then at ordinary temperature Show Answer

Q45) Which of the following is not an intensive property? Show Answer

Q46) In a bomb calorimeter, the heat of reaction is measured at Show Answer

Q47) If temperature remains constant during the process, it is called an Show Answer

Q48) The entropy of the universe Show Answer

Q49) Which of the following enthalpies is always negative? Show Answer

Q50) Which of the following has highest entropy? Show Answer

Q51) Entropy change for an adiabatic reversible process is Show Answer

Q52) The temperature of the system decreases in an Show Answer

Q53) Thermodynamic equilibrium involves Show Answer

Q54) The enthalpies of elements in their standard state are taken as zero. Hence the enthalpy of formation of a compound Show Answer

Q55) When potassium chloride is dissolved in water Show Answer

Q56) According to third law of thermodynamics, the entrophy of crystalline substances at absolute zero is taken as Show Answer

Q57) All the naturally occurring processes proceed spontaneously in a direction which leads to Show Answer

Q58) Free energy, G may be defined as Show Answer

Q59) When a solid changes into liquid, the entropy Show Answer

Q60) Entropy is a measure of Show Answer

Q61) When a solid is converted directly into gaseous state , the process is called sublimation. The entropy change during the process is Show Answer

Q62) Which of the following processes is accompanied by decrease in entropy? Show Answer

Q63) A spontaneous change in one in which the system suffers. Show Answer

Q64) If there is no exchange of heat between the system and the surrounding during the process. It is called Show Answer

Q65) An endothermic reaction is allowed to occur very rapidly in the air. The temperature of the surrounding air Show Answer

Q66) Which of the following is not an intensive property? Show Answer

Q67) Which of the following is not a state function? Show Answer

Q68) Which of the following modes of energy constitutes both kinetic energy and potential energy? Show Answer

Q69) Which of the following gases has the highest heat of combution? Show Answer

Q70) The energy of molecular motion appears in the form of Show Answer

Q71) The enthalpies of formation of organic substances are conveniently determined from Show Answer

Q72) Two objects are said to be in thermal equilibrium if they have same Show Answer

Q73) An isolated system is that system in which Show Answer

Q74) The entropy of a perfect crystalline solid at absolute zero is Show Answer

Q75) Variation of heat of reaction with temperature is known as Show Answer

Q76) The free energy change for a reaction is zero when Show Answer

Q77) 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

Q78) The change in entropy of an ideal gas during a reversible isothermal expansion is Show Answer

Q79) In which case of mixing of a strong acid and a strong base each of 1 M concentration, temperature increase is highest? Show Answer

Q80) Which of the following is not an endothermic reaction? Show Answer

Q81) In thermodynamics, a process is called reversible when Show Answer

Q82) Which of the following statements is false? Show Answer

Q83) The enthalpy change for a reaction does not depend upon Show Answer

Q84) Identify the correct statement regarding a spontaneous process Show Answer

Q85) In an exothermic reaction, the reactants Show Answer

Q86) The variation of heat of reaction with temperature is given by an equation known as
Show Answer

Q87) In an endothermic reaction Show Answer

Q88) An adiabatic process is one in which Show Answer

Q89) Which of the following processes is not accompanied by increase of entropy? Show Answer

Q90) Which of the following conditions is not favourable for the feasibility of a process? Show Answer

Q91) In which of the following cases, the reaction is spontaneous at all temperatures? Show Answer

Q92) In an adiabatic expansion of an ideal gas Show Answer

Q93) Which of the following reaction represents enthalpy of formation of AgCl? Show Answer

Q94) For a reversible process at equilibrium, the change in entropy may be expressed as Show Answer

Q95) Free energy is related to enthalpy and entropy changes as Show Answer

Q96) For an equilibrium state. Show Answer

Q97) Which of the following neutralisation reactions is most exothermic? Show Answer

Q98) Which of the following equations represents standard heat of formation of methane? Show Answer

Q99) The units of entropy are Show Answer

Q100) Which of the following quantities is not a state function? Show Answer

Q101) In an isothermal expansion of an ideal gas Show Answer

Q102) For a spontaneous endothermic reaction Show Answer

Q103) 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

Q104) For an ideal gas, the joule Thomson co-efficient is equal to Show Answer

Q105) The entalpies of combustion of some fuels are given below. Which of these has lowest efficiency as fuel per gram? Show Answer

Q106) Which of the following statements / relationships is not correct? Show Answer

Q107) 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

Q108) 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

Q109) 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

Q110) Which of the following values of heat of formation indicates that the product is least stable? Show Answer

Q111) In which of the following neutralisation reaction. the heat of neutralisation will be highest? Show Answer

Q112) For a reaction to be spontaneous at all temperatures Show Answer

Q113) The enthalpy of neutralisation of any strong acid and strong base is nearly equal to Show Answer

Q114) For a reaction to occur spontaneously Show Answer

Q115) For n moles of an ideal gas Show Answer

Q116) Which of the following expressions is true? Show Answer

Q117) When an ideal gas is suddenly allowed to expand adiabatically into an evacuated container, then Show Answer

Q118) Molar heat capacity of water in equilibrium with ice at constant pressure is Show Answer

Q119) 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

Q120) For a reaction to proceed simultaneously. Show Answer

Q121) 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

Q122) If the system does not exchange heat with the surrounding, the process is Show Answer

Q123) Which of the following is an intensive property? Show Answer

Q124) System in which there is no exchange of matter work or energy with the surrounding is Show Answer

Q125) Considering entropy (s) as a thermodynamic parameter, the criterion for the spontaneity of any process is Show Answer

Q126) The enthalpy of a monoatomic gas at T kelvin is Show Answer

Q127) A reaction occurs spontaneously if Show Answer

Q128) Which of the following pairs of a chemical reaction is certain to result in a spontaneous reaction? Show Answer

Q129) Which of the following are not state functions?
(I) q + w
(II) q
(III) w
(IV) H - TS Show Answer

Q130) Thermodynamically the most stable from of carbon is Show Answer

Q131) Which of these species has a standard enthalpy of formation equal to zero? Show Answer

Q132) Which one of the following demonstrates a decrease in entropy? Show Answer

Q133) Which of the following is correct option for free expansion of an ideal gas under adiabatic condition? Show Answer

Q134) When an ideal gas is allowed to expand adiabatically into an evacuted vessel then Show Answer

Q135) 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

Q136) Which of the following is not true regarding entropy? Show Answer

Q137) the standard enthalpy of combustion of solid boron is equal to Show Answer

Q138) The state of maximum entropy for water is Show Answer

Q139) The net energy change in a reversible cyclic process is Show Answer

Q140) Which of the following set contain only all extensive or intensive properties? Show Answer

Q141) Which of the following statements is false? Show Answer

Q142) In thermodynamics, a process is called reversible when Show Answer

Q143) Which of the following expression is true? Show Answer

Q144) The total entropy change for a system and its surroundings increases, if the process is Show Answer

Q145) The change in entropy of an ideal gas during a reversible isothermal expansion is Show Answer

Q146) For which of the following reaction, the change in enthalpy is equal to change in internal energy? Show Answer

Q147) 4.6 g of iron combines with sulphur evolving 8.27 kJ. The heat of formation of iron sulphide is Show Answer

Q148) Which of the following statement is not correct? Show Answer

Q149) In which of the following, entropy decreases: Show Answer

Q150) All the naturally occurring processes proceed spontaneously in a direction which leads to Show Answer

Q151) In general, for exothermic reactions to be spontaneous Show Answer

Q152) For a reaction to occur spontaneously Show Answer

Q153) For a process to be spontaneous Show Answer

Q154) A reaction is not feasible, if Show Answer

Q155) Identify the correct statement regarding entropy Show Answer

Q156) The law of thermodynamics that provides the basis for the determination of absolute entropy of a substance is Show Answer

Q157) According to the second law of thermodynamics, a process ( reaction ) is spontaneous, if during the process Show Answer

Q158) The law formulated by Nernst is Show Answer

Q159) Free energy change for a reversible process is Show Answer

Q160) Which of the following statements is true ? Show Answer

Q161) The favourable conditions for a spontaneous reaction are Show Answer

Q162) One mole of a perfect gas expands isothermally to ten times its original volume. The change in entropy is Show Answer

Q163) Which of the following pairs, of a chemical reaction, is certain to result in a spontaneous reaction ? Show Answer

Q164) Which of the following conditions regarding the chemical process ensures its spontaneity at all temperatures ? Show Answer

Q165) Which of the following is true for an adiabatic process ? Show Answer

Q166) Which of the following is not a state function ? Show Answer

Q167) When a gas undergoes adiabatics expansion, it gets cooled due to Show Answer

Q168) Which of the following pairs has heat of neutralisation equal to 13.7 kcal ? Show Answer

Q169) For equilibrium reaction, value of Gibb's free energy change is Show Answer

Q170) In which case reaction is spontaneous ? Show Answer