Question 11. In case of the irreversible unimolecular type, first order reaction, the fractional conversion at any time for constant volume system as compared to variable volume system is

Question 12. The concentration of A in a first order reaction, A → B, decreases

Question 13. A second order reaction of the form A + B → C is called a pseudo-first order reaction, when

Question 14. Pick out the correct statement.

Question 15. Arrhenious equation represents graphically the variation between the __________ and temperature.

Question 16. Helium-mercury method is used for the measurement of the __________ of the catalyst.

Question 17. Sum of the powers of the concentration terms in the rate equation is called the __________ of the reaction.

Question 18. The value of 'n' for a chemical reaction A → B, whose reaction rate is → CAn, will be __________ if the rate of the reaction increases by a factor of 8, when the concentration of is doubled.

Question 19. The reaction A → B is conducted in an adiabatic plug flow reactor (PFR). Pure A at a concentration of 2 kmol/m³ is fed to the reactor at the rate of 0.01 m³ /s and at a temperature of 500 K. If the exit conversion is 20%, then the exit temperature (in k)is (Data: Heat of reaction at 298 K = - 50000 kJ/ kmole of A reacted Heat capacities CPA = CPB = 100kJ/kmole. K (may be assumed to be independent of temperature))

Question 20. Variables affecting the rate of homogeneous reactions are