Oxides of Xenon

Q. The shape of $N{H}_3$ is:

1. Trigonal pyramidal
2. Square planar
3. V-shape
4. See-saw

Q. How many lone pairs are present in $O{F}_2$ molecule?

1. 2
2. 4
3. 6
4. 8

Q. Identify the incorrect statement, regarding the molecule $Xe{O}_4$:

1. $Xe{O}_4$ molecule is square planar.
2. There are four $p\pi -d\pi$ bonds.
3. There are four $s{p}^3-p,\sigma$ bonds.
4. $Xe{O}_4$ molecule is tetrahedral.

Q.

What do you understand by the term auto-protolysis of water? What is its significance?

Q.

For a reaction at ${25}^{\circ }C$ enthalpy change $\left(△H\right)$ and entropy change $\left(△S\right)$ are $-11.7\times 103Jmo{l}^{-1}$ and $-105Jmo{l}^{-1}{K}^{-1}$ respectively. Find out whether this reaction is spontaneous or not?

1. Spontaneous

2. Non-spontaneous

Q. The correct relation between the following compound is:

1. Enantiomers
2. Daistereisomers
3. Identical
4. None of these

Q.

How are $Xe{O}_3$ and $Xe{O}_4$ prepared?

Q. The shape of $Xe{O}_3$ molecule is __

Q. Assertion: Both rhombic and monoclinic sulphur exists as $S_8$ but oxygen exists as $O_2$.
Reason: Oxygen forms $p\pi -p\pi$ multiple bonds due to small size and small bond length but $p\pi -p\pi$ bonding is not possible in sulphur.

1. Assertion is wrong but reason is correct statement
2. Both assertion and reason are wrong statements.
3. Assertion is correct but reason is wrong statement
4. Both assertion and reason are correct statements, and reason is the correct explanation of the assertion
5. Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion.

Q. The shape of $Xe{O}_3$ molecule is __

Q. Out of (i) $Xe{O}_3$ (ii) $Xe{O}_2{F}_2$ and (iii) $Xe{O}_4$, the molecules that have the same number of lone pairs on the central atom are:

1. (i) and (ii)
2. (ii) and (iii)
3. (i) and (iii)
4. None of these

Q. In the given reaction
$Xe{F}_6+........⟶Xe{O}_3+HF$
Complete the reaction

1. $24H_{2}O$
2. $3H_{2}O$
3. $6H_{2}O$
4. $12H_{2}O$

Q. The fluoride of xenon with zero dipole moment is:

1. $Xe{F}_6$
2. $XeO{F}_4$
3. $Xe{F}_4$
4. $Xe{O}_2{F}_2$

Q. What happens when Xe (g) is heated with dioxygen gas in a sealed tube?

1. Only is formed
2. Initially is formed which slowly gets oxidized to
3. A mixture of both and is obtained
4. No reaction

Q. Consider the reaction: $F{e}_2{O}_3⟶F{e}_3{O}_4$.
$n$-factor for $F{e}_3{O}_4$ is :

Q.

The noble gases have closed-shell electronic configuration and are monoatomic gases used normal conditions. The low boiling points of the lighter noble gases are due to weak dispersion forces between the atoms and the absence of other interatomic interactions.

The direct reaction of xenon with fluorine leads to a series of compounds with oxidation number +2, +4 and +6. $Xe{F}_4$ reacts violently with water to give $Xe{O}_3$. The compounds of xenon exhibit rich stereochemistry and their geometries can be deduced considering the total number of electron pairs in the valence shell.

The structure of $Xe{O}_3$ is

1. linear

2. planar

3. pyramidal

4. T-shaped

Q. $Xe{O}_3$ is the product obtained by complete hydrolysis of which of the following compounds?

1. 
2. 
3. 
4. All of the above

Q. Under ambient conditions, the total number of gases released as products in the final step of the reaction scheme shown below is:

1. $0$
2. $1$
3. $2$
4. $3$

Q. Which of the following compound is planar and non - polar?

1. $Xe{O}_4$
2. $S{F}_4$
3. $Xe{F}_4$
4. $C{F}_4$

Q. Select the correct statement(s) with respect to the p$\pi$ - d$\pi$ dative bond.

1. In $(P{h}_{3}Si{)}_{2}O$, the Si-O-Si group is nearly linear
2. Silanols such as $(C{H}_3{)}_{3}SiOH$ are stronger protonic acids then their carbon analogs
3. Trisilyl phosphine $P(Si{H}_3{)}_3$ is planar
4. $Cl{O}_4^{-}$ does not polymerise at all

Q. Assertion: Both rhombic and monoclinic sulphur exists as $S_8$ but oxygen exists as $O_2$.
Reason: Oxygen forms $p\pi -p\pi$ multiple bonds due to small size and small bond length but $p\pi -p\pi$ bonding is not possible in sulphur.

1. Assertion is correct but reason is wrong statement
2. Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion.
3. Assertion is wrong but reason is correct statement
4. Both assertion and reason are wrong statements.
5. Both assertion and reason are correct statements, and reason is the correct explanation of the assertion

Q. $n$ factor for $C{u}_{2}S$ in the reaction: $C{u}_{2}S+KMn{O}_4⟶C{u}^{2+}+S{O}_2+M{n}^{2+}$, is:

Q. Compounds formed when the noble gases get entrapped in the cavities of crystal lattices of certain organic and inorganic compounds are known as :

1. Interstitial compounds
2. Hydrates
3. Clathrates
4. Picrates

Q. $Xe{O}_3$ is the product obtained by complete hydrolysis of which of the following compounds?

1. 
2. 
3. 
4. All of the above

Q. Thermodynamically $HXe{O}_4^{-}$ should oxidise water, but reaction does not take place. It is due to the fact__________.

1. that there is a high activation energy barrier between oxidation state +6 to 0
2. that standard emf is positive
3. that $\Delta G^{\circ }=+ve$
4. that $\Delta G^{\circ }=-ve$

Q. "He and Ne form stable hydrates."

1. True
2. False

Q. Excess of KI reacts with $CuS{O}_4$ solution and then $N{a}_2{S}_2{O}_3$ solution is added to it. Which of the statement is incorrect for this reaction?

1. $C{u}_2{I}_2$ is formed
2. $Cu{I}_2$ is formed
3. $N{a}_2{S}_2{O}_3$ is oxidised
4. Evolved $I_2$ is reduced

Q. Hydrolysis of $M{g}_3{N}_2$ gives :

1. $N{H}_3$
2. $NO$
3. $H_2$
4. $C{O}_2$

Q. Complete the following reactions by filling the appropriate choice.
(A) $6Xe{F}_4$ + $12H_{2}O$ $\to$ $4Xe$ + $2Xe{O}_3$ + ___(i)___ + ___(ii)___
(B) $Xe{F}_6$ + $3H_{2}O$ $\to$ ___(iii)___ + $6HF$

1. (i) $F_2$, (ii) $H_{2}O$, (iii) $XeO{F}_4$
2. (i) $24HF$, (ii) 3$O_2$, (iii) $Xe{O}_3$
3. (i) $2HF$, (ii) 2$H_{2}O$, (iii) $XeO$
4. (i) $HF$, (ii) $H_{2}O$, (iii) $X{e}_2{O}_3$

Q.

Give the formula and describe the structure of a noble gas species which is isostructural with:

$IC{l}_4^{-}$

$IB{r}_2^{-}$

$Br{O}_3^{-}$