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Elements of Groups 16, 17 and 18 — Chemistry STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceChemistryElements of Groups 16, 17 and 182 Marks
Question
Give the method of preparation of $XeF _4$ and its structure
✓

Answer

For the preparation of $XeF _4$ :
The covalent bond between dissimilar atoms, $I$ and $Cl$ atoms in $ICl$ is weaker than between similar atoms in $I _2$.
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(a) Given: $2 NO _{2( g )}+ F _{2( g )} \rightarrow 2 NO _2 F$
Rate $= k \left[ NO _2\right]\left[ F _2\right]$
Hence the reaction is first order with respect to $NO _2$ and first order with respect to $F _2$
$\therefore$ Order of reaction $= n _{ NO 2}+ n _{ F 2}=1+1=2$

(b) Given :
$\begin{aligned}
& CHCl _{3( g )}+ Cl _{2( g )} \rightarrow CCl _{4( g )}+ HCl _{( g ),} \\
& \text { Rate }= k \left[ CHCl _3\right]\left[ Cl _2\right]^{1 / 2}
\end{aligned}$
Hence the reaction is first order in $CHCl _3$ and half order in $Cl _2$.
$\therefore$ Order of reaction
$= n _{ CHCl3 }+ n _{ Cl 2}=1+\frac{1}{2}=\frac{3}{2}$

(a) Order of the reaction $=2$
(b) The order of the reaction $=\frac{3}{2}$
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