Chemistry
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New answer posted
9 months agoContributor-Level 9
When we add cryolite (Na? AlF? ) in the extraction of aluminium, the melting point of alumina decreases
New answer posted
9 months agoContributor-Level 10
For the coagulation of a negative sol, the species Ba²? has the highest flocculating power (referring to the Hardy-Schulze rule, where higher charge leads to greater coagulation power).
New answer posted
9 months agoContributor-Level 9
Quantum Numbers and Orbitals:
o Total Node = n - 1 (l => Azimuthal Q.N)
o Radial Node = n - l - 1
o Angular Node: l
o If Angular node = 0, then l = 0, i.e., S orbital.
o If Radial nodes = 2, then n - l - 1 = 2.
o Substituting l = 0 gives n - 0 - 1 = 2, so n = 3.
o Therefore, the orbital is 3s.
New answer posted
9 months agoContributor-Level 10
Haematite: Fe? O?
Bauxite: Al? O? ·xH? O
Magnetite: Fe? O?
Malachite: CuCO? ·Cu (OH)?
New answer posted
9 months agoContributor-Level 10
The electron configuration for Cr (24) is [Ar] 4s¹3d?
Chromium shows common oxidation states from +2 to +6.
New answer posted
9 months agoContributor-Level 9
MgCO? is more soluble than Mg (OH)? , so PPT of Mg (OH)? is formed. Ksp of Mg (OH)? is higher than MgCO?
New answer posted
9 months agoContributor-Level 9
Matching Calcium Compounds to their Description:
o Ca (OCl)? : Bleach
o CaSO? • ½ H? O: Plaster of paris
o CaO: Component of cement
o CaCO? : Antacid
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