Order Face centered cubic unit cell

Order Face centered cubic unit cell
38. A solution of sucrose is hydrolyzed to the extent of 20% after 30 minutes, from the start. After what time will the reaction to be 90% complete?
(a) 369.0 min (b) 309.6 min (c) 296.3 min (d) 269.3 min
39. Determine the order of the reaction: (NH4 )CNO(aq) (aq)
O C
NH2
NH2
given the following data
Initial reactant concentration (molar) Time for half conversion (h)
0.05 37.03
0.10 19.15
0.20 9.45
(a) 1.5 (b) 1 (c) 0 (d) 2
40. For the reaction A o Products of order 1.5, by what factor (approximately) is the rate increased when [A] is tripled?
(a) 5.196 (b) 5.690 (c) 6.15 (d) 6.52
41. In the acid catalyzed hydrolysis of an ester (in aqueous solution at 25qC) calculate T1/2 given the data that 69.12% of
the ester was hydrolyzed in 350 min.
(a) 206.4 min (b) 246 min (c) 264 min (d) 220 min
42. NH3
gas decomposes on the surface of tungsten conforming to zero order reaction. The mean value of the rate constant
is 0.1127 mm sec–1. The initial pressure was found to be 65 mm. Calculate (i) total pressure after 15 sec (ii) partial
pressure of H2
after 50 sec 3 2
(g) (g)
2NH N o 3H2
Order Face centered cubic unit cell
(a) 69.73 mm, 9.26 mm (b) 66.69 mm, 8.45 mm (c) 69.22 mm, 9.62 mm (d) 68.32 mm, 8.98 mm
43. Consider the reaction A(g) o 3 B(g). At t = 0, P°A= 312 mm and P°B = 0. The reaction conforms to , order. T1/2 = 27
minutes calculate the time interval over which the total pressure rises from its initial value to 468 mm.
(a) 13.70 min (b) 11.21 min (c) 10.11 min (d) 12.75 min
44. T1/2 of a reaction is doubled as the initial reactant concentration is doubled. The order of the reaction is
(a) 1 (b) 0.5 (c) 2 (d) zero
45. A first order reaction is 50% complete in 100 minutes at 300 K and in 10 minutes at 400 K, calculate the mean value
of the activation energy in kJ mol–1.
(a) 23 (b) 40 (c) 60 (d) 11.5
46. 50 bacteria are placed inside a flask containing nutrients at 35°C and their multiplication is studied as per data given below.
Time in minutes 0 15 30 45 60
Number of baceria 50 100 200 400 800
How many bacteria will be there after 3 hours?
(a) 2.4 u 103
(b) 2.04 u 105
(c) 1.02 u 105
(d) 6.4 u 104
47. For a first order reaction the value of ‘A’ and ‘Ea
’ in the Arrhenius equation are4 u 1013 s–1 and 98.6 kJ mol–1 respectively.
The temperature at which its half life period will be 10 minutes is