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- Question
A long cylinder and a sphere both of 5 cms diameter are made from the same porous material. The flat ends of cylinder are sealed. Both the cylinder and sphere are saturated with the same solution of sodium chloride. Later both the objects are immersed for a short and equal interval of time in a large tank of water which is well agitated. The fraction of salt remaining in the cylinder and the sphere are Xc and Xs respectively. Which of the following statement is correct?
Options- A. Xc > Xs
- B. Xc = Xs .
- C. Xc < Xs
- D. Xc greater/less than Xs depending on the length of the cylinder
- Correct Answer
- Xc < Xs
- 1. The equivalent diameter for pressure drop is __________ that for heat transfer.
Options- A. smaller than
- B. greater than
- C. equal to
- D. not related with Discuss
- 2. Addition polymerisation takes place either by a free radical mechanism or ionic machanism depending on the reagents used. Free radical polymerisation is catelyzed by __________ , which decompose to give free radicals.
Options- A. organic peroxides
- B. sulphuric acid
- C. hydroflouric acid
- D. none of these Discuss
- 3. LPG stands for
Options- A. liquid petroleum gas
- B. liquified petrol gas
- C. liquid petrol gas
- D. liquefied petroleum gas Discuss
- 4. With increase in temperature, the surface tension of water
Options- A. increases
- B. decreases
- C. remains constant
- D. increases linearly Discuss
- 5. Fireclay bricks is not used for lining the
Options- A. cupola.
- B. gas producer.
- C. bottom of hot metal mixer.
- D. roof of open hearth furnace. Discuss
- 6. Phenol formaldehyde is produced by condensation polymerisation. It is also known as
Options- A. teflon
- B. bakelite
- C. polyester
- D. nylon-66 Discuss
- 7. The most convenient way of expressing solution concentration is in terms of
Options- A. mole fraction
- B. normality
- C. molality
- D. molarity Discuss
- 8. Urea is a __________ fertiliser.
Options- A. nitrogenous
- B. potassic
- C. phosphatic
- D. none of these Discuss
- 9. A fast breeder reactor
Options- A. uses natural uranium as fuel.
- B. does not require a moderator.
- C. both (a) and (b).
- D. neither (a) nor (b). Discuss
- 10. Carbon refractories have very high
Options- A. wetting characteristics
- B. refractoriness
- C. thermal conductivity
- D. both (b) and (c) Discuss
More questions
Correct Answer: smaller than
Correct Answer: organic peroxides
Correct Answer: liquefied petroleum gas
Correct Answer: decreases
Correct Answer: bottom of hot metal mixer.
Correct Answer: bakelite
Correct Answer: molarity
Correct Answer: nitrogenous
Correct Answer: does not require a moderator.
Correct Answer: both (b) and (c)
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