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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.
Chemical Properties of Ethers Ethers are fairly stable compounds. These are not simply reacted along with alkalies, dilute mineral acids, active metals, oxidising agents within
why sodium react with water form a fair
definition of milli equivalent
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
Glucose and fructose are epimers so they are differ in their second carbon position and remaining is same so when they react with phenylhydrazeen they give same osazone
Basics of Periodic Table.
Difference between Oils and Fats Oils and fats belong to similar chemical group, although they are different in their physical state. (i) Oils are liquids at normal temperat
Both of the MOs have the nodes of the original 2p orbitals, which merge into a one node because the nodal plane is common to both orbitals. The antibonding MO has in addition a
what is allotropy
Q. Simple molecular orbital description? we can give a simple molecular orbital description of bonding in B 2 H 6 as follows. Each boron atom is sp 3 hybrid giving four sp 3
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