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(A) First,identify the elements:$P$ is Phosphorus $(Z=15)$,$Q$ is Arsenic $(Z=33)$,$R$ is Fluorine $(Z=9)$,and $S$ is Sodium $(Z=11)$.$(A)$ Electron a

Vedclass · Accepted Answer

$EA : Q > R$ (where $EA = 	ext{electron affinity}$)

Vedclass · Answer

(A) First,identify the elements:$P$ is Phosphorus $(Z=15)$,$Q$ is Arsenic $(Z=33)$,$R$ is Fluorine $(Z=9)$,and $S$ is Sodium $(Z=11)$.$(A)$ Electron affinity $(EA)$: For group $15$ elements,$EA$ decreases down the group. Thus,$P > Q$. However,$R$ (Fluorine) has a lower $EA$ than expected due to small size and inter-electronic repulsion,but generally,$EA$ of $P$ and $Q$ are very low compared to halogens. Comparing $Q$ and $R$,$R$ is a halogen and has a higher $EA$ than $Q$. Thus,$Q > R$ is incorrect.$(B)$ Electronegativity $(EN)$: $R$ $(F)$ is the most electronegative element,so $R > P$ is correct.$(C)$ Ionisation potential $(IP)$: $P$ has a stable half-filled $p$-orbital $(3p^3)$,making its $IP$ higher than $S$ $(3s^1)$,which is correct.$(D)$ Size: $S$ $(Na)$ is in period $3$,while $R$ $(F)$ is in period $2$. Thus,$S > R$ is correct.Therefore,the incorrect statement is $A$.

List-$I$	List-$II$
$i)$ Most reactive non-metal	$A$. $\Delta H_1=419, \Delta H_2=3051, \Delta_{Eg} H=-48$
$ii)$ Most reactive metal	$B$. $\Delta H_1=1681, \Delta H_2=3374, \Delta_{Eg} H=-328$
$iii)$ Least reactive element	$C$. $\Delta H_1=738, \Delta H_2=1451, \Delta_{Eg} H=-40$
$iv)$ Metal forming binary halide	$D$. $\Delta H_1=3272, \Delta H_2=5251, \Delta_{Eg} H=+48$

The electronic configurations of $4$ atoms are given below:
$P = [Ne] \, 3s^2 3p^3$
$Q = [Ar] \, 3d^{10} 4s^2 4p^3$
$R = [He] \, 2s^2 2p^5$
$S = [Ne] \, 3s^1$
Which of the following statements is incorrect?

Similar Questions

Select the correct statements from the following:
$(a)$ Effective nuclear charge for nitrogen is $3.90$
$(b)$ $IP$ of $Ne$ is more than $Na^{+}$
$(c)$ Order of electronegativity $sp > sp^2 > sp^3$
$(d)$ Order of acidic character $NH_3 < PH_3 < AsH_3$

Describe the periodicity of the first ionization enthalpy for elements with atomic numbers $1$ to $60$.

In which of the following options the order of arrangement does not agree with the variation of property indicated against it?

Which of the following statements is incorrect?

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The electronic configurations of $4$ atoms are given below:$P = [Ne] \, 3s^2 3p^3$$Q = [Ar] \, 3d^{10} 4s^2 4p^3$$R = [He] \, 2s^2 2p^5$$S = [Ne] \, 3s^1$Which of the following statements is incorrect?