Chlorides of Phosphorus

Q. $C{l}_2$ gas on reaction with hot and concentrated $NaOH$ gives:
[0.77 Mark]

1. $NaCl+NaOCl$
2. $NaCl+NaCl{O}_3$
3. $NaOCl+NaCl{O}_3$
4. $NaCl+NaCl{O}_4$

Q.

The structure of ${\mathrm{PCl}}_5$ in the solid-state is

1. Square Planar ${\left[{\mathrm{PCl}}_4\right]}^{+}$and Octahedral ${\left[{\mathrm{PCl}}_6\right]}^{-}$

2. Tetrahedral ${\left[{\mathrm{PCl}}_4\right]}^{+}$and Octahedral ${\left[{\mathrm{PCl}}_6\right]}^{-}$

3. Trigonal bipyramidal

4. Square pyramidal

Q. How does $PC{l}_5$ exist in its solid state?

1. $\left[PC{l}_4{]}^{+}\right[PC{l}_6{]}^{-}$
2. $\left[PC{l}_3{]}^{2+}\right[PC{l}_7{]}^{2-}$
3. $\left[PC{l}_2{]}^{3+}\right[PC{l}_8{]}^{3-}$
4. $\left[PC{l}_5\right]\left[PC{l}_5\right]$

Q. Which of the following 3d-metal ion will give the lowest enthalpy of hydration $\left({\Delta }_{\text{hyd}}H\right)$ when dissolved in water?

Q.

Which of the following describes the bonds in PCl₅?

1. 2 axial and 3 equatorial

2. 3 axial and 2 equatorial

3. 4 axial and 5 equatorial

4. 5 axial and 4 equatorial

Q. In phosphine, how does phosphorus have -3 oxidation state, even though the electronegativity of hydrogen is more than phosphorus in Pauling's table?

Q. Among the following, the number of compounds that can react with $PC{l}_5$ to give $POC{l}_3$ is $O_2,C{O}_2,S{O}_2,H_{2}O,H_{2}S{O}_4,P_4{O}_{10}.$

Q.

What is the common oxidation state of the elements of the lanthanoids series?

Q. Metallic character of alkali metals

1. Decreases with increase in atomic no.
2. Increases with increase in atomic no.
3. Increases followed by a decrease with increasing atomic no.
4. Decreases followed by an increase with increasing atomic no.

Q.

How the metallic character of p-block elements changes as we move from top to bottom in a group?

1. Decreases from top to bottom

2. Increases from top to bottom

3. First increases and then decreases

4. Remains constant from top to bottom

Q. Which of the following statement regarding allotropic forms of phosphorus is incorrect?

1. White phosphorus is more reactive than red and black phosphorus due to high angular strain
2. Red phosphorus on heating catches fire readily and gives dense red fumes of $P_4{0}_{10}$
3. Red phosphorus is polymeric in nature consisting of chains of $P_4$ tetrahedra
4. Black phosphorus has two forms $\alpha$-black and $\beta$-black phosphorus

Q. Explain why White Phosphorus is kept under water but red phosphorus is not?

Q. In the crystalline state, $PC{l}_5$ shows which of the following hybridization/s?

1. $s{p}^3$
2. $s{p}^2$
3. $s{p}^{3}d$
4. $s{p}^3{d}^2$

Q. A translucent white solid $\left(A\right)$ reacts with excess of chlorine to give a yellowish white powder $\left(B\right).$ $\left(B\right)$ reacts with organic compounds containing $-OH$ group converting them into chloro derivatives. $\left(B\right)$ on hydrolysis gives $\left(C\right)$ and is finally converted to phosphoric acid. $\left(A\right),\left(B\right)$ and $\left(C\right)$ are:

1. $P_4,PC{l}_3$ and $H_{3}P{O}_4$
2. $P_4,PC{l}_5$ and $H_{3}P{O}_3$
3. $P_4,PC{l}_5$ and $POC{l}_3$
4. $P_4,PC{l}_3$ and $POC{l}_3$

Q.

In the gaseous state, $PC{l}_5$ exists in the form of trigonal bipyramidal. In the structure, all the bonds are of equal length and can be treated equivalent. True or False?

1. True

2. False

Q. In the given reactions,
$1.I_2+H_2{O}_2+2O{H}^{-}\to 2I^{-}+2H_{2}O+O_2$

$2.H_2{O}_2+HOCl\to C{l}^{-}+H_3{O}^{+}+O_2$

1. $H_2{O}_2$ acts as an oxidising agent in both the reactions

2. $H_2{O}_2$ acts as a reducing agent in both the reactions

3. $H_2{O}_2$ acts as an oxidising agent in reaction (1) and as a reducing agent in reaction (2)
4. $H_2{O}_2$ acts as a reducing agent in reaction (1) and as an oxidizing agent in reaction (2)

Q.

Name one covalent compound which is soluble in water.

Q. Hybridisation of central atom of cation of solid $PC{l}_5$, solid $PB{r}_5$ solid $N_2{O}_5$ are respectively

1. $s{p}^3,s{p}^3,s{p}^2$
2. $s{p}^2,s{p}^2,s{p}^2$
3. $s{p}^3,s{p}^3,sp$
4. $s{p}^3,s{p}^2,sp$

Q. Identify the incorrect statement related to $PC{l}_5$ from the following:

1. Two axial $P–Cl$ bonds make an angle of 180° with each other
   
2. Axial $P–Cl$ bonds are longer than equatorial $P–Cl$ bonds
   
3. Three equatorial $P–Cl$ bonds make an angle of 120° with each other
   
4. $PC{l}_5$ molecule is non-reactive

Q. The product formed in the reaction of $SOC{l}_2$ with white phosphorus

1. $PC{l}_3$
2. $S{O}_{2}C{l}_2$
3. $SC{l}_2$
4. $POC{l}_3$

Q. Which of the following statement(s) regarding allotropic forms of phosphorus is/are correct?

1. White phosphorus is more reactive than red and black phosphorus due to high angular strain
2. Red phosphorus on heating catches fire readily and gives dense red fumes of $P_4{0}_{10}$
3. Red phosphorus is polymeric in nature consisting of chains of $P_4$ tetrahedra
4. Black phosphorus has two forms $\alpha$-black and $\beta$-black phosphorus

Q. In the crystalline state, $PC{l}_5$ shows which of the following hybridization/s?

1. $s{p}^3$
2. $s{p}^2$
3. $s{p}^{3}d$
4. $s{p}^3{d}^2$

Q.

Which group has the least metallic character?

Q. Among the following, choose the compounds that can react with $PC{l}_5$ to give $POC{l}_3$.

1. $P_4{O}_{10}$
2. $H_{2}S{O}_4$
3. $H_{2}O$
4. $S{O}_2$

Q. Lewis acids among the following are
(i) $CC{l}_4$ (ii) $SiC{l}_4$ (iii) $Ge{F}_4$

1. Only ii and iii
2. Both i, ii
3. Only i, ii
4. i, ii, iii

Q. What is the oxidation state of Phosphorus in $P{Cl}_3$?

1. $+5$
2. $+3$
3. $+1$
4. $-3$

Q. Ozonolysis of $Cl{O}_2$ produces an oxide of chlorine. The average oxidation state of chlorine in this oxide is .

Q.

In the solid state $PC{l}_5$ exists as an ionic solid - True or False?

1. False

2. True

Q. Identify the incorrect statement related to $PC{l}_5$ from the following:

1. Three equatorial $P–Cl$ bonds make an angle of 120° with each other
   
2. Two axial $P–Cl$ bonds make an angle of 180° with each other
   
3. Axial $P–Cl$ bonds are longer than equatorial $P–Cl$ bonds
   
4. $PC{l}_5$ molecule is non-reactive

Q. Which of the following compounds react with $Sb{F}_5$ ?

1. 
2. 
3. 
4.