The different oxidation states exhibited by the lanthanoids are:

1. +2, -3, +4 2. -2, -3, -4
3. +2, +3, -4 4. +2, +3, +4
Subtopic:  f-Block Elements- Properties & Uses |
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Alloy that contains lanthanoid metals is-

1. Mischmetal

2. Permalloy

3. Supermalloy

4. Brass

Subtopic:  f-Block Elements- Properties & Uses |
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Give below are some atomic numbers:

29, 59, 74, 95, 102, 104
The atomic numbers of the inner transition elements among the above are :

1. 29, 59, 74

2. 59, 95, 102

3. 95, 102, 104

4. 59, 74, 95
Subtopic:  f-Block Elements- Properties & Uses |
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The electronic configuration of the last element of actinoids is :

1. Thorium, Th: Rn5f146d17s2

2. Lawrencium, Lr: Rn5f146d17s2

3. Neptunium, Np: Rn5f146d17s2

4. Protactinium, Pa: Rn5f146d17s2

Subtopic:  f-Block Elements- Properties & Uses |
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Consider the following statements: 

a. Lanthanoid and actinoid belong to the f block and their general electronic configuration is  nf1-14 n-1d0-1ns2 .
b. All lanthanides and actinoids show an oxidation state of +3.
c. The magnetic properties of the actinoids are more complex than those of the lanthanoids. 
d. Lanthanoids are comparatively less electropositive than actinides

Correct statements amongst the above are:

1. a, b 2. c, d, a
3. d, a, b 4. b, c, d
Subtopic:  f-Block Elements- Properties & Uses |
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The correct statement regarding inner transition elements is

1. The general electronic configuration of actinoids is [Xe]54 4f1-145d0-16s2
2. The general electronic configuration of lanthanoids is [Rn]86 5f1-146d0-17s2
3. Alkalies have no action on actinoids.
4. The principal oxidation state of lanthanoids is +1.
Subtopic:  f-Block Elements- Properties & Uses |
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The most common oxidation state for lanthanoids and actinoids is:

1. +5

2. -3

3. +1

4. +3

Subtopic:  f-Block Elements- Properties & Uses |
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Incorrect statement(s) regarding inner transition elements is/are:

1. Lanthanoid contraction has a stronger impact on the radius than actinoid contraction
2. Lanthanoids commonly show +4 oxidation state  
3. Actinoids are more reactive metals than lanthanoids.
4. Both (1) and (2) 

Subtopic:  f-Block Elements- Properties & Uses |
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