Vikram Sarabhai Space Centre Scientist/ Engineer Chemical Paper 2018
| 1 | In an ideal tubular-flow reactor
(a) threre is no mixing in longitudinal direction (b) mixing takes place in radial direction (c) there is a uniform velocity across the radius (d) All the above |
| 2 | Rate determining step in a reaction consisting of a number of steps in series is the _____ step.
(a) fastest (b) slowest (c) intermediate (d) data insufficient; can’t be predicted |
| 3 | Rate determining step in a reaction consisting of a number of steps in series is the _____ step.
(a) fastest (b) slowest (c) intermediate (d) data insufficient; can’t be predicted |
| 4 | For a heterogeneous reaction system, the rate of mass transfer
(a) Affects the reaction rate (b) Does not affect the reaction rate (c) Affects only the reaction rate of fast reactions (d) Affects only the reaction rate of slow reactions |
| 5 | At a given value of E/R (ratio of activation energy and gas constant), the ratio of the rate constants at 500 K and 400 K is 2, if Arrhenious law is used. What will be this ratio, if transition state theory is used with the same value of E/R.
(a) 1.6 (b) 2.0 (c) 2.24 (d) 2.5 |
| 6 | The ratio of maximum to average velocity in case of streamline flow between parallel plates is
(a) 1 (b) 1.5 (c) 2 (d) 2.5 |
| 7 | A fluid is said to be ideal if it is
(a) Viscous and Compressible (b) Viscous and incompressible (c) Inviscous and Compressible (d) Inviscous and Incompressible |
| 8 | Density of water is maximum at
(a) 0 C (b) 4 C (c) 20 C (d) 100 C |
| 9 | Anemometer is used to measure
(a) Velocity (b) Pressure (c) Viscosity (d) Density |
| 10 | The ratio of average fluid velocity to the maximum velocity in case of laminar flow of a Newtonion fluid in a circular pipe is
(a) 1 (b) 0.5 (c) 0.66 (d) 2 |
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