Chemical Engineering - Chemical Engineering Basics
Exercise :: Chemical Engineering Basics - Section 3
| 26. |
Dephosphorisation of molten pig iron is favoured by |
| A. |
oxidising and basic slag. | | B. |
reducing and basic slag. | | C. |
high activity co-efficient of phosphorous in metal. | | D. |
oxidising and neutral slag. |
Answer: Option B
Explanation:
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| 27. |
In a neutral solution |
| A. |
H+ ions are absent. | | B. |
OH- ions are absent. | | C. |
both H+ and OH- ions are present in very small but equal concentration. | | D. |
none of these. |
Answer: Option C
Explanation:
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| 28. |
Which of the following commonly used condenser tube materials has the lowest thermal conductivity? |
| A. |
Admirability brass. | | B. |
Stainless steel. | | C. |
Aluminium brass. | | D. |
Titanium. |
Answer: Option B
Explanation:
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| 29. |
Strain hardening effect in a metal subjected to cold working is due to the __________ mechanism. |
| A. |
fracture | | B. |
dislocation | | C. |
slip | | D. |
twinning |
Answer: Option C
Explanation:
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| 30. |
A common disinfectant used in village wells for disinfection of water is |
| A. |
free chlorine | | B. |
bromine | | C. |
iodine | | D. |
potassium permanganate |
Answer: Option D
Explanation:
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