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Explain objectives of annealing? Discuss the various annealing processes? Is spheroidising different from annealing? Illustrate.
A slow cooling rate from eutectoid temperature yields course pearlite - a mixture of comparatively coarse crystals of ferrite and cementite. Such a slow cooling is known as annealing. Here, sufficient time is available for carbon in the austenite to diffuse and redistribute itself to 0.02% in ferrite and 6.67% in cementite. During annealing, effective transformation temperature is low, where rate of growth is rapid compared to rate of nucleation. Hence, spheroidising is obviously different from annealing.
Ask A mixture of water and graphite is heated to 890 K in a 10 L container. When the system comes to equilibrium it contains 0.875 mol each of CO and H2 and 0.289 mol of H2O and s
Tests of unsaturation - Bromine - carbon tetrachloride test The compound is liquefying in carbon tetrachloride or chloroform and after that a few drops of 5% bromine solution i
kcl crystal structure
The third line in Balmer series corresponds to an electronic transition between which Bohr's orbits in hydrogen: (1) 5 → 3 (2) 5 → 2 (3) 4→ 3
Compound A has the molecular formula C 4 H 8 O 2 . Figure 1 gives the infrared spectra of compound A. Table gives the chemical shifts and multiplicity data of the broad-ban
Q. Show Redox Reactions as Electron Transfer? Ans. Oxidation is a process where electrons are lost, and reduction is a process where electrons are gained. For example,
The interionic attraction depends on interaction of: (1) Solute-Solute (2) Solvent-Solvent (3) The charges (4) Molecular proper
What aspects of amino acid structure are involved in the formation and stabilisation of beta-sheets in proteins? Start with a paragraph that describes important basic informatio
explain the law of chemical combination
can u tell me what happens with ionic compounds when heat is given??
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