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- Question
'If the catalyst pore size is small in comparison with the mean free path, collisions with the pore wall controls the process'. The diffusivity under this condition is called 'Knudsen diffusivity', which is affected by the
Options- A. pressure
- B. temperature
- C. both (a) & (b)
- D. neither (a) nor (b)
- Correct Answer
- temperature
- 1. A standard test for determination of hardness in water is termed as __________ test.
Options- A. EDTA
- B. electometric
- C. total count
- D. presumptive Discuss
- 2. Starting material for the production of butadiene in India is
Options- A. naphthalene
- B. benzol
- C. ethyl alcohol
- D. phthalic anhydride Discuss
- 3. Atomic __________ of an element is a whole number.
Options- A. weight
- B. number
- C. volume
- D. radius Discuss
- 4. Coal based fertiliser plants at Ramagundam (Andhra Pradesh) and Talchar (Orissa)
Options- A. use coal for heating purpose.
- B. gasify coal to get hydrogen from coal gas.
- C. use coal as filler in fertiliser.
- D. use coal as conditioner in fertiliser. Discuss
- 5. Calcium ammonium nitrate (CAN) is
Options- A. a mixed fertiliser
- B. a straight fertiliser
- C. a complex fertiliser
- D. not a fertiliser ; it is an explosive Discuss
- 6. In case of a solution (not of a solid in a liquid), whose total volume is more than the sum of volumes of its components in their pure states, solubility is
Options- A. independent of the temperature.
- B. increased with the increase in pressure.
- C. decreased with the increase in pressure.
- D. unchanged by the pressure change.
- E. none of these Discuss
- 7. __________ liquor is best handled in a long tube vertical evaporator.
Options- A. Foamy
- B. Scaling
- C. Viscous
- D. Salting Discuss
- 8. Pressure of 0.01 psi (absolute) can be measured by __________ gauge.
Options- A. ionisation
- B. Pirani
- C. Mcloid
- D. none of these Discuss
- 9. Addition of filter aid to the slurry before filtration is done to ...... of the cake.
Options- A. increase the porosity
- B. increase the compressibility co-efficient
- C. decrease the porosity
- D. decrease the compressibility co-efficient Discuss
- 10. The average thickness of ozone layer in stratosphere is about __________ dobson unit (DU).
Options- A. 20
- B. 230
- C. 750
- D. 1500 Discuss
More questions
Correct Answer: EDTA
Correct Answer: ethyl alcohol
Correct Answer: number
Correct Answer: gasify coal to get hydrogen from coal gas.
Correct Answer: a complex fertiliser
Correct Answer: decreased with the increase in pressure.
Correct Answer: Foamy
Correct Answer: Mcloid
Correct Answer: increase the porosity
Correct Answer: 230
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