Oxides of Phosphorus

Q. The species given below that does $NOT$ show disproportionation reaction is:

1. $Br{O}_3^{-}$
2. $Br{O}^{-}$
3. $Br{O}_2^{-}$
4. $Br{O}_4^{-}$

Q. In which compound synergic effect is present?

1. $\left[Ni\right(CO{)}_4]$
2. $[NiC{l}_4{]}^{2-}$
3. $[CuC{l}_4{]}^{2-}$
4. $\left[Mn\right(H_{2}O{)}_6{]}^{2+}$

Q. Which of the following oxoacid of sulphur $-O-O-$ linkage ?

1. $H_2{S}_2{O}_7$, pyrosulphuric acid
2. $H_{2}S{O}_3$, sulphurous acid
3. $H_{2}S{O}_4$, sulphuric acid
4. $H_2{S}_2{O}_8$, peroxodisulphuric acid

Q. The number of $\text{P – O – P}$ bonds in $P_4{O}_6$:

1. $6$
2. $0$
3. $3$
4. $4$

Q. Hydrolysis of $P_4{O}_{10}$ gives:

1. $H_{3}P{O}_3$
2. $H_{3}P{O}_4$
3. $H_{3}P{O}_2$
4. $HP{O}_3$

Q.

Give the disproportionation reaction of $H_{3}P{O}_3$.

Q. Which of the following(s) is/are formed on hydrolysis of $PC{l}_5$?

1. $POC{l}_3$
2. $H_{3}P{O}_4$
3. $HCl$
4. $PC{l}_3$

Q. Which of the following is the most stable carbanion?

1. 
2. 
3. 
4. 

Q.

Name an orange compound which on heating leaves a green residue and evolves a neutral gas.

Q. $P_2{O}_5$ is heated with water to give

1. hypophosphoric acid
2. orthophosphoric acid.
3. hypophosphorous acid
4. phosphorous acid

Q. The structure of orthophosphoric acid is

1. 
2. 
3. 
4. 

Q. Select the correct statement for $P_4{O}_{10}$:

1. It has four $s{p}^3$ - hybridized phosphorus atoms
2. It has higher %s - character in P-O bond than in $P_4{O}_6$
3. It has a cage - like structure
4. It has $p\pi -d\pi$ bonding.

Q. The number of P-O-P bonds in Phosphorus trioxide and Phosphorus pentoxide are ___ and ___ respectively.

Q. Ammonium nitrate decomposes on heating into:

1. Ammonia and nitric acid
2. Nitrous oxide and water
3. Nitrogen, hydrogen and ozone
4. Nitric oxide, nitrogen dioxide and hydrogen

Q.

Name the method used for the preparation of the following salt from the options.

Lead chloride

1. Decomposition by acid

2. Double decomposition

3. Direct synthesis

4. Simple displacement

5. Neutralization

Q. On hydrolysis of $P_4{O}_{10}$ with water we obtain:

1. $H_{3}P{O}_{3}andP{H}_3$
2. $H_{3}P{O}_{4}and{H}_{3}P{O}_3$
3. $H_{3}P{O}_4$ only
4. $H_4{P}_2{O}_{7}and{H}_2$

Q. $3c-2e$ bonds are present in dimer of $AlC{l}_3$

Q. Which of the following is not an example of disproportionation reaction

1. $4P+3NaOH+3H_{2}O\to 3Na{H}_{2}P{O}_2+P{H}_3$
2. $C{l}_2+KI{O}_3+2KOH\to KI{O}_4+2KCl+H_{2}O$
3. $4KCl{O}_3\to 3KCl{O}_4+KCl$
4. $3C{l}_2+6NaOH\to 5NaCl+NaCl{O}_3+3H_{2}O$

Q.

Using an appropriate catalyst, ethane can be oxidized to an alcohol, an aldehyde, and an acid.

Name alcohol, aldehyde, and acid formed when ethane is oxidized.

Q. The correct statement(s) out of the following is/are:

1. White phosphorus has $4\text{P}-\text{P}$ bonds
2. $P_4{O}_{10}$ is used as a drying agent
3. In $P_4{O}_{10}$, each phosphorus atom is bonded to three oxygen atoms
4. $P_4{O}_{10}$ hydrolyses in water and forms phosphorus acid

Q. How many bridging oxygen atoms are present in $P_4{O}_{10}$ ?

1. 6
2. 4
3. 2
4. 5

Q. White phosphorus burns in a limited supply of air to form Phosphorus trioxide. When this soft white solid is burnt in plentiful supply of air, we get phosphorus __.

Q. Assertion :The O-O bond length in $H_2{O}_2$ is shorter than that of $O_2{F}_2$. Reason: $H_2{O}_2$ has an open book-type structure.

1. Assertion is true, Reason is true and Reason is correct explanation for Assertion

2. Assertion is true, Reason is true and Reason is NOT the correct explanation for Assertion

3. Assertion is true, Reason is false

4. Assertion is false, Reason is true

Q. In compound $\left[M\right(CO{)}_n{]}^z$, the correct match for highest ${}^{\prime }C-O^{\prime }$ bond length for given $M$, $n$ and $z$ respectively, is:

1. $M=Ti;n=6;z=-2$
2. $M=Cr;n=6;z=0$
3. $M=V;n=6;z=-1$
4. $M=Mn;n=6;z=+1$

Q. The number of P-O-P bonds in Phosphorus trioxide and Phosphorus pentoxide are __________ and __________ respectively.
___

Q. In $P{O}_4^{3-}$ ion, the formal charge on each oxygen atom and $P-O$ bond order respectively are

1. -0.75, 1.0
2. -3, 1.25
3. -0.75, 0.6
4. -0.75, 1.25

Q. On hydrolysis of $P_4{O}_{10}$ with water we obtain:

1. $H_{3}P{O}_{3}andP{H}_3$
2. $H_{3}P{O}_{4}and{H}_{3}P{O}_3$
3. $H_{3}P{O}_4$ only
4. $H_4{P}_2{O}_{7}and{H}_2$

Q. $P_4{O}_{10}$ is dimer of $P_2{O}_5$. The number of $P-P$ bond is/are.

1. zero
2. one
3. two
4. four

Q. Which of the following is a tetrabasic acid?

1. Orthophosphoric acid
2. Hypophosphorus acid
3. Metaphosphoric acid
4. Pyrophosphoric acid

Q. The correct statement(s) out of the following is/are:

1. $P_4{O}_{10}$ is used as a drying agent
2. White phosphorus has $4\text{P}-\text{P}$ bonds
3. In $P_4{O}_{10}$, each phosphorus atom is bonded to three oxygen atoms
4. $P_4{O}_{10}$ hydrolyses in water and forms phosphorus acid