[{"id":252849,"question":"Change in enthalpy (∆H) of a system can be calculated by","choices":[{"text":"∆H=∆E - PV","value":"A"},{"text":"ΔH =ΔE +q","value":"B"},{"text":"∆H = ∆E - q","value":"C"},{"text":"∆Η = ΔΕ + P∆V","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252847,"question":"Choose from the followings the correct statement about Born Haber cycle","choices":[{"text":"Born Haber cycle is different from Hess's law","value":"A"},{"text":"The energy changes in a cyclic process is not zero","value":"B"},{"text":"The lattice energy of crystalline substances can be calculated easily","value":"C"},{"text":"None","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252846,"question":"Enthalpy of formation of one mole of ionic compound form gaseous ion under standard condition is called","choices":[{"text":"Gibb's energy","value":"A"},{"text":"Gibb's energy","value":"B"},{"text":"Bond energy","value":"C"},{"text":"Lattice energy","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252845,"question":"According to Hess's law, the enthalpy change for a reaction","choices":[{"text":"Depends on path","value":"A"},{"text":"Independent of the path","value":"B"},{"text":"The sum of ∆E and ∆H","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252843,"question":"Decomposition of H2O is","choices":[{"text":"Endothermic reaction","value":"A"},{"text":"Nuclear reaction","value":"B"},{"text":"Exothermic reaction","value":"C"},{"text":"Zero nuclear reaction","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252842,"question":"The lattice energy of NaCl is","choices":[{"text":"787 j/ mole","value":"A"},{"text":"790 kj/mol","value":"B"},{"text":"780 kJ/ mol","value":"C"},{"text":"-787 kI / mole","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252841,"question":"The value of ∆V being very small. The term P∆V can be neglected for process involving","choices":[{"text":"Liquid and gas","value":"A"},{"text":"Solids and gases","value":"B"},{"text":"Liquid and solid","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252839,"question":"The enthalpy change for the reaction C2H2 + 5/2 O2 --------> 2CO2 + H2O is known as enthalpy of","choices":[{"text":"Fomation of CO2","value":"A"},{"text":"Fusion ofC2H4","value":"B"},{"text":"Combustion of C2H4","value":"C"},{"text":"Vaporization of C2H2","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252837,"question":"A state function which describes together the internal energy and product of pressure and volume is called","choices":[{"text":"Enthalpy","value":"A"},{"text":"internal energy","value":"B"},{"text":"Work","value":"C"},{"text":"Kinetic energy","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252836,"question":"The enthalpies of all elements in their standard states are","choices":[{"text":"Unity","value":"A"},{"text":"always +ve","value":"B"},{"text":"always -ve","value":"C"},{"text":"zero","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252835,"question":"Total heat content of a system is called","choices":[{"text":"Internal energy","value":"A"},{"text":"Entropy","value":"B"},{"text":"Enthalpy","value":"C"},{"text":"All of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252833,"question":"The measurement of enthalpy change at standard conditions means that we should manage the measurement at","choices":[{"text":"24°C at 1 atm","value":"A"},{"text":"25°C at 1 atm","value":"B"},{"text":"0C° at 1 atm","value":"C"},{"text":"100C° 1 atm","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252832,"question":"Most of the reactions which give stable products are","choices":[{"text":"Endothermic","value":"A"},{"text":"Exothermic","value":"B"},{"text":"Isothermal","value":"C"},{"text":"Non of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252831,"question":"During an exothermic or endothermic reaction which one of the following formula is used to calculate the amount of heat evolved or absorbed","choices":[{"text":"ΔΗ = ΔΕ+PV","value":"A"},{"text":"∆E= q+w","value":"B"},{"text":"Δp =ΔΗ","value":"C"},{"text":"q = m x s x ∆T","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252830,"question":"The exothermic process is","choices":[{"text":"Evaporation","value":"A"},{"text":"Sublimation","value":"B"},{"text":"Respiration","value":"C"},{"text":"Boiling","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252829,"question":"The heat of reaction depends upon","choices":[{"text":"Temperature of the reactants","value":"A"},{"text":"Physical states of the reactants and the products","value":"B"},{"text":"Both A) and B)","value":"C"},{"text":"Path of the reaction and the temperature","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252828,"question":"One Joule is equivalent to","choices":[{"text":"4.184 cal.","value":"A"},{"text":"0.4184cal.","value":"B"},{"text":"1/2 cal.","value":"C"},{"text":"1/4.184 cal","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252827,"question":"If an endothermic reaction is allowed to take place very rapidly in air, the temperature of the surrounding air will","choices":[{"text":"Remains constant","value":"A"},{"text":"Increase","value":"B"},{"text":"Decrease","value":"C"},{"text":"Either increase or decrease","value":"D"},{"text":"One Joule is equivalent to","value":"E"}],"correctAnswer":3},{"id":252826,"question":"What is not correct about ∆HF","choices":[{"text":"It is always negative","value":"A"},{"text":"Ìts value gives an idea about the relative stability of reactants and the products.","value":"B"},{"text":"Its value can be greater or less than zero","value":"C"},{"text":"Value depends upon nature of bonds","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252825,"question":"What is correct about heat of combustion","choices":[{"text":"It is applicable to gaseous substances only","value":"A"},{"text":"It is always negative","value":"B"},{"text":"It is always positive","value":"C"},{"text":"It is positive in some cases while negative in other","value":"D"},{"value":"E"}],"correctAnswer":2}]