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- Question
The rate constant of a chemical reaction increases by 100 times when the temperature is increased from 400 °K to 500 °K. Assuming transition state theory is valid, the value of E/R is
Options- A. 8987°K
- B. 9210°K
- C. 8764°K
- D. 8621°K
- Correct Answer
- 9210°K
- 1. Fine grit present in sewage is removed in the __________ during sewage treatment.
Options- A. grit chamber
- B. detritus tank
- C. trickling filter
- D. skimming tank. Discuss
- 2. In a size reduction crushing operation, feed size is 300 to 1500 mm while the product size is 100 to 300 mm. This is a case of the __________ crushing.
Options- A. secondary
- B. fine
- C. primary
- D. ultrafine Discuss
- 3. Excessive liquid gradient on a tray may result in the
Options- A. maldistribution of gas.
- B. back trapping.
- C. gas blowing beneath cap skit.
- D. all (a), (b) and (c). Discuss
- 4. A sinusoidal variation in the input passing through a linear first order system
Options- A. becomes more oscillatory (frequency increases).
- B. becomes less oscillatory (frequency decreases).
- C. gets amplified (magnitude increases).
- D. gets attenuated (magnitude decreases). Discuss
- 5. In the allocated cap area, bubble caps are generally arranged on equilateral triangular pitch. Number of caps fixed on a plate is with a
Options- A. clearance of 25-75 mm.
- B. cap pitch of 1.3-2 times the cap diameter.
- C. either 'a' or 'b'.
- D. neither 'a' nor 'b'. Discuss
- 6. Thin spherical shells subjected to internal pressure, develop __________ stresses.
Options- A. radial
- B. circumferential
- C. both (a) & (b)
- D. neither (a) nor (b) Discuss
- 7. In a multipass shell and tube heat exchanger, the shell side cross flow area does not depend upon
Options- A. baffle spacing
- B. clearance
- C. pitch
- D. none of these Discuss
- 8. Thermal conductivity cell is the primary element of a/an __________ analyser.
Options- A. oxygen
- B. carbon dioxide
- C. carbon monoxide
- D. sulphur dioxide Discuss
- 9. Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of
Options- A. ozone and iodine.
- B. chlorine or its compounds.
- C. ultraviolet light for irradiation of water.
- D. all (a), (b) & (c). Discuss
- 10. In a grinding operation, the limiting particle size is the size of the __________ particle in the sample.
Options- A. smallest
- B. largest
- C. either (a) or (b)
- D. neither (a) nor (b) Discuss
More questions
Correct Answer: detritus tank
Correct Answer: primary
Correct Answer: all (a), (b) and (c).
Correct Answer: gets attenuated (magnitude decreases).
Correct Answer: either 'a' or 'b'.
Correct Answer: radial
Correct Answer: none of these
Correct Answer: carbon dioxide
Correct Answer: all (a), (b) & (c).
Correct Answer: neither (a) nor (b)
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