Chemistry D F Block Elements Lanthanoids Online Exam Quiz
Chemistry D F Block Elements Lanthanoids GK Quiz. Question and Answers related to Chemistry D F Block Elements Lanthanoids. MCQ (Multiple Choice Questions with answers about Chemistry D F Block Elements Lanthanoids
What is the general electronic configuration of the lanthanides?
Options
A : (n-2)f 1-14 (n-1)d 1-10 ns2
B : (n-2)f 1-14 (n-1)d 1-2 ns2
C : (n-2)f 1-14 (n-1)d 0-1 ns2
D : (n-2)f 1-14 (n-1)d 0 ns2
What is the most common oxidation state of lanthanides?
Options
A : +2
B : +4
C : +6
D : +3
Which of the following is not a consequence of lanthanide contraction?
Options
A : From La+3 to Lu+3, the ionic radii changes from 106 pm to 85 pm
B : As the size of the lanthanide ions decreases the basic strength increases
C : The basic character of oxides and hydroxides decreases with increase in atomic number
D : The atomic radii of 4d and 5d series is similar
Which of the following is the correct order of arrangement of the first five lanthanides according to atomic number?
Options
A : La, Ce, Pr, Nd, Pm
B : La, Pr, Ce, Pm, Nd
C : La, Pr, Ce, Nd, Pm
D : La, Ce, Pr, Pm, Nd
Which of the following lanthanide ions do not exhibit color?
Options
A : Lu+3 and Ln+3
B : Lu+2 and Ln+2
C : Ce+3 and Ce+3
D : Pr+4 and Ce+4
What happens to the atomic size of the lanthanides with increase in atomic number?
Options
A : The radius remains unchanged
B : The radius decreases
C : The radius increases
D : The radius first increases and then decreases
Which of the following is not a property of lanthanides?
Options
A : They are soft metals with white silvery color
B : They tarnish rapidly by air
C : The hardness of the metals increases with increase in the atomic number
D : The melting point of the metal ranges from 500-1000K
In lanthanides, Ce changes from +4 to +3 oxidation state.
Options
A : True
B : False
C :
D :
The lanthanides are d-block elements.
Options
A : True
B : False
C :
D :
Which is the last element of lanthanides?
Options
A : Ytterbium
B : Lutetium
C : Thulium
D : Erbium
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