Choose the incorrect order.

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) Let us analyze each option:$A$. $IE_2$ order: $Li^+ (1s^2)$,$O^+ (1s^2 2s^2 2p^3)$,$F^+ (1s^2 2s^2 2p^4)$. $Li^+$ has a noble gas configuration,so

Vedclass · Accepted Answer

$Li > O > F$ ($IE_2$ order)

Vedclass · Answer

(A) Let us analyze each option:$A$. $IE_2$ order: $Li^+ (1s^2)$,$O^+ (1s^2 2s^2 2p^3)$,$F^+ (1s^2 2s^2 2p^4)$. $Li^+$ has a noble gas configuration,so it has the highest $IE_2$. $F^+$ has higher $Z_{eff}$ than $O^+$,so $IE_2$ order is $Li > F > O$. Thus,option $A$ is incorrect.$B$. $EA$ order: $Mg$ ($3s^2$,stable),$S$ $(3p^4)$,$Cl$ $(3p^5)$. $EA$ increases across a period. $Mg$ has near-zero $EA$. The order $Mg $C$. Size order: $I > Br > F > O > N$. The given order $I > Br > N > O > F$ is incorrect because $N, O, F$ are in the same period and size decreases from $N$ to $F$. Thus,option $C$ is also incorrect.$D$. $Z_{eff}$ order: $Na (Z=11, Z_{eff}=2.2)$,$K (Z=19, Z_{eff}=2.2)$,$Ca (Z=20, Z_{eff}=2.85)$. The order $Na Note: Both $A$ and $C$ are incorrect orders.

List-$I$	List-$II$
$(A)$ Rubidium	$(1)$ Germanium
$(B)$ Platinum	$(2)$ Radioactive chalcogen
$(C)$ Eka-silicon	$(3)$ $s$-block element
$(D)$ Polonium	$(4)$ Atomic number $78$

Similar Questions

Which of the following sequences represents the atomic numbers of only representative elements?

Diagonal relationship is shown by

$(a)$ $Be$ and $Mg$ are alkaline earth metals.
$(b)$ $K^{+}$ has larger radii than $Ca^{2+}$.
$(c)$ All $d$-block elements are transition elements.
$(d)$ $H^{-}$ ion is larger than $F^{-}$.
Incorrect statement is/are

Select the correct order for the elements $B, C, N, O$:

Match the items in List-$I$ with the items in List-$II$:
List-$I$ List-$II$
$(A)$ Rubidium $(1)$ Germanium
$(B)$ Platinum $(2)$ Radioactive chalcogen
$(C)$ Eka-silicon $(3)$ $s$-block element
$(D)$ Polonium $(4)$ Atomic number $78$

Vedclass Test Series

Exam Paper Generator

Online Exam Module