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:
|
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:
|
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:
|
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:
|
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:
|