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NEET Questions / Chemistry / Classification of Elements and Periodicity in Properties / S,P,D,F-Block
Which of the following elements exhibits the highest oxidation state among its compounds?
Cr
Mn
Fe
Co
Which of the following lanthanides is most commonly used in making flints for lighters?
La
Ce
Pr
Nd
Which of the following properties generally decreases across the lanthanide series?
Atomic radius
Ionization energy
Electronegativity
Density
Potassium permanganate (KMnO) acts as a strong oxidizing agent in acidic medium. What is the oxidation state of manganese in the product formed when KMnO reacts with ferrous sulfate in acidic medium?
+7
+4
+2
+6
Which block of elements is characterized by the filling of the (n-2)f orbitals?
s-block
p-block
d-block
f-block
A -block element in which last electron enters into -orbitals of valence shell instead of -orbital is:
No such element exist