The incorrect match among the following options is :
1.
2.
3.
4.
The element having electronic configuration [Kr]4d104f14, 5s25p6, 6s2 belongs to:
1. s-block
2. p-block
3. d-block
4. f-block
The correct electronic configuration of an element that is just above the 4th period and belongs to the 16th group: |
Which of the following options shows an incorrect order of ionic radii?
1. Sr2+<Rb+<Br-<Se2-
2. Nb5+<Zr4+<Y3+
3. Co>Co2+>Co3+>Co4+
4. Ba2+>Cs+<Se2-<As3-
Which of the following pairs has the most significant size variation?
1. | Na and Na+ | 2. | Na and K |
3. | Cl and Cl– | 4. | Mg and Mg+ |
Given below are pair of species. Which pair has the largest difference in sizes?
1. | Na and K | 2. | K and K+ |
3. | Cl and Cl- | 4. | Cl and Br |
Assertion (A) | The helium atom has the highest ionization energy among all the elements. |
Reason (R): | Helium is the smallest atom among all the elements. |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | Both (A) and (R) are False. |
Which is the correct order of ionization energies?
1. F- > F > Cl- > Cl
2. F > Cl > Cl- > F-
3. F- > Cl- > Cl > F
4. F- > Cl- > F > Cl