[{"id":252877,"question":"A system absorbs 100 kJ heat and performs 50 kJ work on the surroundings. The increase in internal energy of the system is","choices":[{"text":"50kJ","value":"A"},{"text":"100 kJ","value":"B"},{"text":"150kJ","value":"C"},{"text":"5000 kJ","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252876,"question":"The enthalpy change AH of a process is given by the relation","choices":[{"text":"ΔΗ =ΔΕ + P∆V","value":"A"},{"text":"ΔH=ΔE +W","value":"B"},{"text":"ΔH =ΔΕ-ΔnRT","value":"C"},{"text":"ΔΕ =ΔΗ + P∆V","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252875,"question":"ΔH° represent the enthalpy change at","choices":[{"text":"0°C and 1 atm pressure","value":"A"},{"text":"25°Cand 1atm","value":"B"},{"text":"0K and I atm pressure","value":"C"},{"text":"25°C and 2 atm pressure","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252873,"question":"Born-Haber cycle is an application of","choices":[{"text":"Hess's law","value":"A"},{"text":"1\" law of thermodynamics","value":"B"},{"text":"Avogadro's law","value":"C"},{"text":"1law of thermochemistry","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252872,"question":"Neutralization of acid-base is","choices":[{"text":"Spontaneous","value":"A"},{"text":"Exothermic","value":"B"},{"text":"Non spontaneous","value":"C"},{"text":"Both \"a\" and \"c","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252871,"question":"The change in enthalpy when one mole of a substance is dissolved in a specified quantity of solvent at a given temperature is called","choices":[{"text":"Heat of reaction","value":"A"},{"text":"Heat of solvation","value":"B"},{"text":"Heat of combustion","value":"C"},{"text":"Heat of solvent","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252869,"question":"Which of the following enthalpy change always have a negative value","choices":[{"text":"∆Hf","value":"A"},{"text":"∆H sol","value":"B"},{"text":"∆Hc","value":"C"},{"text":"∆Hat","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252868,"question":"The change in enthalpy of a system when one mole of the substance is completely burnt in excess of air or oxygen is called","choices":[{"text":"Heat of reaction","value":"A"},{"text":"Heat of formation","value":"B"},{"text":"Heat of atomization","value":"C"},{"text":"Heat of combustion","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252867,"question":"<div>By convention, the standard heat of formation of all elements is assumed to be</div>","choices":[{"text":"Zero","value":"A"},{"text":"positive","value":"B"},{"text":"Negative","value":"C"},{"text":"Infinity","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252865,"question":"One kilo calorie is equal to","choices":[{"text":"4.184J","value":"A"},{"text":"1000J","value":"B"},{"text":"4184J","value":"C"},{"text":"1kJ","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252864,"question":"∆H=∆E is true for which of the following reaction","choices":[{"text":"K+H2O-----&gt;KOH+H2","value":"A"},{"text":"N2+3H2------&gt;2NH3","value":"B"},{"text":"AlCl3+3NaOH---&gt;Al(OH)3+3 NaCl","value":"C"},{"text":"4Na + O2-----&gt;2Na2O","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252862,"question":"Which of the following processes has always. ∆H=-ve","choices":[{"text":"Formation of compound","value":"A"},{"text":"Dilution of a solution","value":"B"},{"text":"Dissolution of ionic compound","value":"C"},{"text":"Combustion","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252861,"question":"Enthalpy of a system can be calculated by which of following relationship","choices":[{"text":"q=ΔΕ","value":"A"},{"text":"q=m×S×∆T","value":"B"},{"text":"q=pv","value":"C"},{"text":"q=m×v×∆T","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":252860,"question":"One of the best applications of Hess's law to calculate the lattice energy of ionic compound is","choices":[{"text":"Measurement of enthalpy change in a calorimeter","value":"A"},{"text":"Studying of first law of thermodynamics","value":"B"},{"text":"Measurement of a heat of formation of a compound","value":"C"},{"text":"Born-Haber cycle","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252858,"question":"How much heat is absorbed by 100 g of water when its temperature decreases from 25°C to 5°C? (heat capacity is 4.2 J/gK)","choices":[{"text":"84,000J","value":"A"},{"text":"2000/4.2J","value":"B"},{"text":"-2000/4.2j","value":"C"},{"text":"-8400J","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":252857,"question":"Whenever a reaction is endothermic, then it means that","choices":[{"text":"Heat is transferred system to the surrounding","value":"A"},{"text":"Heat is transferred from surrounding to the system","value":"B"},{"text":"Heat content of the products is less than that of reactants","value":"C"},{"text":"Heat content of the reactants is greater than the products","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252856,"question":"Enthalpy of neutralization (∆H°n) per mole of H2SO4/ Ba(OH)2 is","choices":[{"text":"+57.4 kJmol-1","value":"A"},{"text":"-114.8 kJmol-1","value":"B"},{"text":"-57.4 kJmol-1","value":"C"},{"text":"-57.4 kJmol-1","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":252854,"question":"In order to determine ∆H (latt) of ionic compound which is correct relationship","choices":[{"text":"∆H latt. = ∆Hf - ∆Hx","value":"A"},{"text":"∆H latt. = ∆Ha + ∆Hv","value":"B"},{"text":"∆H latt. = ∆Hf + ∆Hx","value":"C"},{"text":"∆H latt. = ∆Hf - ∆H sol.","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252853,"question":"Enthalpy of a reaction can be measured by","choices":[{"text":"Glass calorimeter","value":"A"},{"text":"Barometer","value":"B"},{"text":"Manometer","value":"C"},{"text":"Thermometer","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":252852,"question":"If internal energy of the system is increased","choices":[{"text":"Change in state of the system may occur","value":"A"},{"text":"Temperature of the system may rise","value":"B"},{"text":"Chemical reaction may take place","value":"C"},{"text":"All of these","value":"D"},{"value":"E"}],"correctAnswer":4}]