21. Corrosion resistance of steel is increased by the addition of
22. Tin in its pure form is used for making
23. All materials obey Hooke's law within elastic limit. When elastic limit is reached, the tensile strain
24. Acetaldehyde is shipped in __________ drums.
25. Aqueous nitric acid is stored in __________ vessel.
26. Babbit metals used for making bearings are
27. Presence of manganese in alloy steel improves its
28. As the impurities are oxidised, the melting point of iron
29. Glass lined vessels are not used for handling
30. Thermosetting resins are those polymers, which
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