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Tempering is a heat treatment method for metals and alloys. In steels, tempering is completed to "toughen" the metal by transforming brittle marten site into bainite or a combination of ferrite and cementite. Precipitation hardening alloys, like most of the grades of aluminum and super alloys, are tempered to precipitate intermetallic particles which strengthen the metal.
Uses of oils and fats (a) Several oils and fats are used as food material. (b) Oils and fats are employed for the manufacture of glycerol, fatty acids, soaps, candles, veget
The hydride ions H- are isoelectronic with: (1) Li (2) He + (3) He (4) Be Ans: He
Condensation with formaldehyde - Miscellaneous reactions Phenol condenses with formaldehyde (excess) in presence of sodium hydroxide or acid (H + ) for about a week to form a p
explain types of ir spectrometer
Silver salt method for acids - Chemical methods It is based upon the fact that silver salt of an organic acid on heating provides residue of metallic silver.
What are ferrites? Ferrites are ceramic compounds having trivalent metal having three valence electrons iron and oxide of divalent element i.e. metals having two free electrons
The radius of electron in the first excited state of hydrogen atom is: (1) a 0 (2) 4a 0 (3) 2a 0 (4) 8a o
Q. Determine the percentage of total solids in the given samples of milk After undertaking this activity, you will be able to: • explain the technique of determination of
what is instrumentation for constant current coulometry
240 g of water at 20 degree C are mixed with a sample of iron at 500 degree C. The final temperature of the system is 42 degree C. Find the mass of the iron sample
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