The reaction of XeF6 with a limited amount of quartz gives compound A. Then on reaction with an equivalent amount of XeO3, A gives B. The products A and B are, respectively
XeOF4 and XeO2F2
Reaction of XeF6 with Limited Quartz
The question describes a two-step chemical process involving xenon compounds. The first step is the reaction between XeF6 and a limited amount of quartz (SiO2).
Xenon hexafluoride (XeF6) is a powerful fluorinating agent and reacts with oxides like SiO2. When XeF6 reacts with a limited amount of SiO2, it typically produces xenon oxyfluoride and silicon tetrafluoride. The specific oxyfluoride formed depends on the ratio, but with a limited amount of SiO2, the product is predominantly XeOF4.
The balanced chemical equation for this reaction is:
\(\text{XeF}_6\text{(g)} + \text{SiO}_2\text{(s)} \rightarrow \text{XeOF}_4\text{(l)} + \text{SiF}_4\text{(g)}\)
Thus, compound A is XeOF4.
Reaction of Compound A (XeOF4) with XeO3
The second step involves the reaction of compound A (which we identified as XeOF4) with an equivalent amount of XeO3.
XeOF4 is xenon oxyfluoride and XeO3 is xenon trioxide. Both contain xenon in the +6 oxidation state. When XeOF4 reacts with XeO3, they undergo a reaction that results in the formation of xenon dioxide difluoride (XeO2F2).
The balanced chemical equation for this reaction is:
\(\text{XeOF}_4\text{(l)} + \text{XeO}_3\text{(s)} \rightarrow 2\text{XeO}_2\text{F}_2\text{(s)}\)
Thus, compound B is XeO2F2.
Identifying Products A and B
Based on the reactions described:
- Compound A formed from the reaction of XeF6 with limited SiO2 is XeOF4.
- Compound B formed from the reaction of Compound A (XeOF4) with XeO3 is XeO2F2.
Therefore, the products A and B are XeOF4 and XeO2F2, respectively.
Let's compare this with the given options:
| Option | Compound A | Compound B |
|---|---|---|
| 1 | XeOF2 | XeO2F2 |
| 2 | XeOF4 | XeO2F2 |
| 3 | XeOF2 | XeOF4 |
| 4 | XeO2F2 | XeOF4 |
Our findings match Option 2.
Important Questions from p - Block
- The correct statement for alkali metal is:
Consider the following pairs of compounds.
(i) NH4Cl and FeO
(ii) H3N∙BF3 and BCl3
(iii) HSO3F and HF
The more acidic species in (i), (ii) and (iii) are, respectively
Which of the following has the lowest boiling point?
Choose the equilibria from the following that are NOT favoured to go to right:
(A) As2S5 + 5HgO ⇌ As2O5 + 5 HgS
(B) La2(CO3)3 + Bi2S3 ⇌ La2S3 + Bi2(CO3)3
(C) CdSO4 + CaS ⇌ CdS + CaSO4
(D) BeF2 + HgI2 ⇌ BeI2 + HgF2
Which of the following reaction(s) do(es) NOT occur
(i) [NPCl2]3 + 6 NaF \(\rm \xrightarrow[reflux]{MeCN}\) [NPF2]3 + 6 NaCl
(ii) n PCl5 + n NH4Cl \(\rm \xrightarrow[reflux]{C_6H_5Cl}\) [NPCl2]n + 4 n HCl [n = 3, 4, 5]
(iii) n PF 5 + n NH 4 F \(\rm \xrightarrow[reflux]{C_6H_5Cl}\) [NPF 2 ] n + 4 n HF [n = 3, 4, 5]
