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 |
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. |
The spin-only magnetic moment of is:
1. 3.25
2. 1.73
3. zero
4. 4.21
1.
2.
3.
4. None of the above.
The correct reactions among the following are:
1. | a and c | 2. | b and c |
3. | a and b | 4. | a, b and c |
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 IE1 of 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) |
The correct statement regarding inner transition elements is
1. | The general electronic configuration of actinoids is |
2. | The general electronic configuration of lanthanoids is |
3. | Alkalies have no action on actinoids. |
4. | The principal oxidation state of lanthanoids is +1. |
The most common oxidation state for lanthanoids and actinoids is:
1. | +5 | 2. | –3 |
3. | +1 | 4. | +3 |
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. |
1. | Cr2+ is strongly oxidizing while manganese(III) is strongly reducing. |
2. | Cobalt(II) is stable in an aqueous solution but in the presence of complexing reagents, it is easily oxidized. |
3. | The d1 configuration is very unstable in ions. |
4. | None of the above. |