Related InterviewSolutions

• For an ideal gas, the value of `((dU)/(dV))_(T)` is:A. positiveB. zeroC. negativeD. interchangeable
• The amount of heat liberated when one mole of `NH_(4)OH` reacts with one mole of HCl isA. 13.7 kcalB. more than 13.7 kcalC. less than 13.67 kcalD. cannot e predicted.
• Assertion (A): The enthalpy of formation of `H_(2)O(l)` is greater than that of `H_(2)O(g)`. Reason (R ) : Enthalpy change is negative for the condensation reaction `H_(2)O(g) rarr H_(2)O(l)`.A. If both (A) and (R) are correct and (R) is the correct reason for (A).B. If both (A) and (R) are correct but (R) is not the correct explanation for (A).C. If (A) is true but (R) is falseD. If both (A) and (R) are false.
• Assertion (A): For a particular reaction, heat of combustion at constant pressure `(q_(P))` is always greater than that at constant volume `(q_(V))`. Reason (R ) : Combustion reactions are invariably accomplished by increase in number of moles.A. If both (A) and (R) are correct and (R) is the correct reason for (A).B. If both (A) and (R) are correct but (R) is not the correct explanation for (A).C. If (A) is true but (R) is falseD. If both (A) and (R) are false.
• Statement -1: heat of neutralistion of perchoric acid `,HClO_(4)` with NaOH is same as that of Hcl with NaOH . Statement -2: Both HCl and `HClO_(4)` are strong acidA. If both (A) and (R) are correct and (R) is the correct reason for (A).B. If both (A) and (R) are correct but (R) is not the correct explanation for (A).C. If (A) is true but (R) is falseD. If both (A) and (R) are false.
• Assertion (A): The enthalpy of both graphite and diamond is taken to be zero, being elementary substances Reason (R ) : The enthalpy of formation of an elementary substance in any state is taken as zero.A. If both (A) and (R) are correct and (R) is the correct reason for (A).B. If both (A) and (R) are correct but (R) is not the correct explanation for (A).C. If (A) is true but (R) is falseD. If both (A) and (R) are false.
• The enthalpy of formation of organic compounds are conveniently determined from their:A. `-286.0`B. `-143.0`C. `286.0`D. `143.0`
• Assertion (A): Enthalpy of graphite is lower than that of diamond. Reason (R ) : Entropy of graphite is lower than that of diamond.A. If both (A) and (R) are correct and (R) is the correct reason for (A).B. If both (A) and (R) are correct but (R) is not the correct explanation for (A).C. If (A) is true but (R) is falseD. If both (A) and (R) are false.
• The enthalpy change for the reaction `2C("graphite")+3H_(2)(g)rarrC_(2)H_(6)(g)` is calledA. enthalpy of formationB. enthalpy of combustionC. enthalpy of hydroenationD. enthalpy of vaporisation
• A thermodynamic quantity is thatA. which is used in thermochemistryB. which obeys all laws of thermodynamicsC. quantity whose value depends only upon the state of the systemD. quantity which is used in mesuring thermal change