Q. No.The element having very high electron affinity but zero ionisation enthalpy is:
1. He (due to inert gas configuration)
2. Be (due to fully filled subshell)
3. H (due to presence of allotropes)
4. None of the above
Consider the following four elements, which are represented according to long form of periodic table.
Here W, Y and Z are left, up and right elements with respect to the element 'X' and 'X' belongs to 16th group and 3rd period. Then according to given information the incorrect statement regarding given elements is:
1. Maximum electronegativity :Y
2. Maximum catenation property :X
3. Maximum electron affinity :Z
4. Y exhibits variable covalency
The incorrect match among the following options is:
| 1. |
\([Ar]3d^54s^1 \rightarrow 4^{th} \text {period}, 6^{th} \text {group}\) |
| 2. | \([Kr]4d^{10} \rightarrow 5^{th} \text {period}, 12^{th} \text {group}\) |
| 3. | \([Rn]6d^2 7s^2\rightarrow 7^{th} \text {period}, 3^{rd} \text {group}\) |
| 4. | \([Xe]4f^{14} 5d^26s^2 \rightarrow 6^{th} \text {period}, 4^{th} \text {group}\) |
The correct order of ionization energies for the elements Si, P, Ge, and As, from lowest to highest, is:
| 1. | Si < P < Ge < As | 2. | As < Ge < P < Si |
| 3. | Ge < Si < As < P | 4. | Ge < As < Si < P |
The element having electronic configuration [Kr]4d104f14, 5s25p6, 6s2 belongs to:
1. s-block
2. p-block
3. d-block
4. f-block
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 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
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+ |
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