The correct statement(s) about interstitial compounds is/are:

1. Transition elements are large in size and contain multiple interstitial sites.
2. Transition elements can trap atoms of other elements.
3. Interstitial compounds are chemically inert.
4. All of the above.

Subtopic:  d-Block Elements- Properties & Uses |
 91%
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The spin-only magnetic moment of Ce3+ is -

1. 3.25 2. 1.73
3. zero 4. 4.21
Subtopic:  d-Block Elements- Properties & Uses |
 61%
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Match the following:

Ions  Number of unpaired electrons
i. Mn3+ a. 2
ii. Cr3+ b. 4
iii. V3+ c. 1
iv. Ti3+ d. 3
 
i ii iii iv
1. c d b a
2. b d a c
3. d b a c
4. b d c a
Subtopic:  d-Block Elements- Properties & Uses |
 80%
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In an aqueous solution, coloured ions would be:

1. Ti3+,V3+, Cu+

2. Sc3+, Mn2+, Fe3+

3. Ti3+,V3+, Mn2+, Fe3+,  Co2+

4. None of the above.

Subtopic:  d-Block Elements- Properties & Uses |
 76%
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The correct reactions among the following are:

a. MnO4-+H++Fe2+2Mn2++Fe3++H2O
b. C2O42-+MnO4-+H+Mn2++H2O+CO2
c. SO2+MnO4-+H+Mn2++H2O+SO3

1. a and c

2. b and c

3. a and b

4. a, b and c

Subtopic:  Chemistry of Mn and Cr Compounds |
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The correct statement(s) about transition elements are:  

1. +2, and +3 oxidation states are more common for elements in the first transition series, while higher oxidation states are more common for the heavier elements.
2. The heavier transition elements form low-spin complexes only.
3. The atomic sizes of the elements of the first transition series are smaller than those of the heavier elements (elements of 2nd and 3r transition series).
4. All of the above.
Subtopic:  d-Block Elements- Properties & Uses |
 87%
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Select the appropriate statement(s) from the following options: 

1. The maximum oxidation state of the d block elements appears in the middle and the minimum at the extreme ends.
2. IE1 of third transition series elements is smaller than IEof second and first transition series elements.
3. The atomic sizes of the elements in the 3d series are greater than those in the 4d or 5d series.
4. Both (1) and (2) 

Subtopic:  d-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 |
 65%
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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 |
 93%
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The correct statement(s) about transition elements is/are:  

1. The lowest oxide of a transition metal is basic, the highest is amphoteric/acidic.
2. A transition metal exhibits the highest oxidation state in oxides and fluorides.
3. The highest oxidation state is exhibited in the oxoanions of a metal.
4. All of the above.

Subtopic:  d-Block Elements- Properties & Uses |
 90%
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