101⟩ In 3d-series, which two elements exhibit an anomalous configuration?
Chromium Cr(Z=24) = [Ar] 4s1 3 d5
Copper(Cu)(Z=29)= [Ar] 4s1 3 d10
Bio Chemistry
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237 Bio Chemistry Questions And Answers
102⟩ H2S2O7 is. Oxidation state of sulphur in it is.
H2S2O7 is Di (or) pyro Sulphuric acid and oxidation state of Sulphur is +6
103⟩ Thio sulphuric acid is. What are the nature of acid and how many OH? Groups are present in it.
Thio Sulphuric acid is H2S2O3
104⟩ Negative oxidation states of nitrogen are because.
Higher Electro negativity
105⟩ Allotrope form of phosphorous that conducts electricity is.
Black Phosphorous
106⟩ What is the molecular formula, Structure, and bond angle of Phosphorous?
P4- Phosphorous molecule (Tetra atomic)
Structure- Tetrahedral
Bond angle – (60 degrees
107⟩ More volatile and least volatile hydrides in 5thA group are.
PH3—more volatile
NH3—less volatile
108⟩ Why nitrogen cannot form penta halides?
Because of the absence of d-orbital in its valency shells
109⟩ What is the Anhydride of N2O5?
Nitric acid
110⟩ Transitional metal Ions can form complex compounds by.
By accepting the lone pair of electrons from ligand
111⟩ Sixth group elements are called as.
Chalcogens (ore forming elements)
112⟩ What is the Super phosphate of lime?
Ca (H2Po4)2 caSO4. 2H2O. Super phosphate of lime is also called as Calcium super Phosphate
113⟩ What is the other name of sulphur?
Brimstone
114⟩ Which is the most stable sulphur at room temperature?
Rhombic Sulphur
115⟩ What is the oxidation number of transitional metals in carbonyl Compounds is?
Zero
116⟩ Which oxo acids of sulphur contain S-S bonds?
Thio acids
117⟩ Define Raoult’s law
The relative lowering of vapor pressure of a dilute solution of a non volatile solute is equal to the mole fraction of the solute
-P / = n / n+N
n = number of moles of solute
N= number of moles of solvent
118⟩ What is PH? What are the units of PH?
PH is the negative logarithm of the hydrogen Ion Concentration express4ed in moles/liter of aqueous solution.
119⟩ Ortho Phosphoric acid is. Give oxidation no of phosphorous in it.
H3PO4-ortho phosphoric acid
Oxidation state of phosphorous is +5
120⟩ Define Ionic product of water. What is its value?
The product concentrations H+ and OH- in pure water are in aqueous solutions at a given temperature is known as Ionic Product of water. Its value is 1.0 * 10-14 moles2 / litre2.
