Chemical Engineering - Chemical Engineering Basics
Exercise :: Chemical Engineering Basics - Section 6
| 26. |
The order of a chemical reaction |
| A. |
can be determined only experimentally | | B. |
can be determined from the stoichiometry of the reaction. | | C. |
can not be zero. | | D. |
can be fractional. |
Answer: Option B
Explanation:
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| 27. |
Pick out the wrong statement. |
| A. |
Lead can creep under its own weight at room temperature. | | B. |
The electrical conductivity of gold is considerably reduced by alloying additions due to the decrease in electron movement. | | C. |
Recrystallisation temperature decreases with decrease in strain in a cold worked metal. | | D. |
With increase in temperature, the electrical conductivity of intrinsic semi-conductor will increase. |
Answer: Option C
Explanation:
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| 28. |
Pick out the wrong statement. |
| A. |
Reflectivity of gases is very low. | | B. |
Absorptivity for metals is very high. | | C. |
Reflectivity for non-conducting materials is low. | | D. |
Reflectivity of polished surfaces is very high. |
Answer: Option B
Explanation:
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| 29. |
For efficient performance of a blast furnace, the extent of reduction of Wustite (FeO) should be |
| A. |
100% indirect reduction. | | B. |
100% direct reduction. | | C. |
50-60% indirect reduction. | | D. |
30-40% indirect reduction. |
Answer: Option C
Explanation:
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| 30. |
Identify the false statement |
| A. |
Martensitic steels are less susceptible to pitting corrosion than austenitic steels. | | B. |
Pitting corrosion is usually very localised. | | C. |
Hydrogen embrittlement is facilitated by tensile stress. | | D. |
Stress corrosion cracking is facilitated by tensile stress. |
Answer: Option A
Explanation:
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