Phosphoryl Chloride

Q. Which of the following has $p\pi -d\pi$ bonding?

1. NO₃^-
2. SO₃^2-
3. BO₃^3-
4. CO₃^2-

Q. Which of the following d orbitals is not used in bonding to form $H_{2}S{O}_4$ ?

1. $d_{xy}$
2. $d_{yz}$
3. $d_{zx}$
4. $d_{z^2}$

Q. Hybridisation involves the mixing of orbitals having comparable energies of same atom. Hybridised orbitals perform efficient overlapping than overlapping by pure $s,p$ or $d$ orbitals.
Consider the following compounds and select the incorrect statements among the following:
$N{H}_3,P{H}_3,H_{2}S,S{O}_2,S{O}_3,B{F}_3,PC{l}_3,I{F}_7,P_4,H_2$

1. Six molecules out of the following involves hybridisation
2. Three molecules are hypervalent compounds
3. Six molecules out of the above compounds are non-planar in structure
4. Two molecules out of the given compounds involves $(d\pi -p\pi )$ as well as also involves $(p\pi -p\pi )$ bonding

Q. Which of the following is not 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 statements is(are) correct regarding $B{F}_3$:

1. $B{F}_3$ is covalent
2. $B{F}_3$ is a colourless gas
3. The bond lengths in $B{F}_3$ are significantly shorter than the sum of the covalent radii
4. $p_z$ atomic orbital on $B$ does not involve in hybridization

Q. Explain why ${\left(C{H}_3\right)}_3{C}^{\oplus }$ is more stable than $C{H}_3\stackrel{\oplus }{C}{H}_2$ and $\stackrel{\oplus }{C}{H}_3$ is less stable.

1. Tautomerism
2. Hyperconjugation
3. Inductive effect
4. Resonance

Q. In the presence of a small amount of water, $PC{l}_5$ hydrolyses to form:

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

Q. The hybridisation of central atoms in ${N_3}^{-}$, $NOCl$ and $N_{2}O$ respectively are:

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

Q. Assertion :$PC{l}_4$ exists but $NC{l}_5$ does not exist. Reason: $d-$ orbital in $P-$atom takes part in chemical bonding, this lacks in $N-$ atom.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Assertion is incorrect but Reason is correct

Q. In the presence of a small amount of water, $PC{l}_5$ hydrolyses to form:

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

Q. In the compound of type $PO{X}_3,$ P atom shows multiple bonding of the type:-

1. $p\pi -d\pi$
2. $d\pi -d\pi$
3. $p\pi -p\pi$
4. No multiple bonding

Q. Assertion :$S{F}_6$ exists but $S{H}_6$ does not. Reason: $d\pi -p\pi$ bonding cannot take place in $S{H}_6$

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Assertion is incorrect but Reason is correct

Q. In monomeric $B{H}_3$, let an axis definition place the molecule in the xz plane. Which atomic orbital on $B$ is non-bonding?

1. $2s$
2. $2p_x$
3. $2p_y$
4. $2p_z$

Q. If a molecule $M{X}_3$ has zero dipole moment, the $\sigma$ - bonding orbitals used by M (atomic number < 21) is:

1. $s{p}^3$ - hybridized
2. pure $p$
3. $sp$ - hybridized
4. $s{p}^2$ - hybridized

Q. Hybridisation of iodine in $I{F}_7$ molecule is:

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

Q. The hybridisation of sulphur in $S{F}_4$ is:

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

Q. In the presence of a small amount of water, $PC{l}_5$ hydrolyses to form:

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

Q. Increasing paramganetism of $Ca,Al,O,N$ is $Ca<Al<O<N$.
if true enter 1, else enter 0.

1. 1

Q. Among the following which one is a wrong statement?

1. $P{H}_5$ and $BiC{l}_5$ do not exist
2. $p\pi -d\pi$ bonds are present in $S{O}_2$
3. $Se{F}_4$ and $C{H}_4$ have same shape
4. $I_3^{+}$ has bent shape

Q. The pi acceptor ligand are those which possess vacant $\pi$-orbitals in addition to the lone pairs of $e^{-}$, which of the following complex/ion has the highest $M-C$ bond order?

1. $\left[V\right(CO{)}_6{]}^{-}$
2. $Fe(CO{)}_5$
3. $Ni(CO{)}_4$
4. $\left[Mn\right(CO{)}_6{]}^{+}$

Q. In the compound of type $PO{X}_3,$ P atom shows multiple bonding of the type:-

1. $p\pi -d\pi$
2. $d\pi -d\pi$
3. $p\pi -p\pi$
4. No multiple bonding

Q. The $HNH$ angle value is higher than $HPH,HAsH$ and $HSbH$ angles. Why?

Q. In the compound of type $PO{X}_3,$ P atom shows multiple bonding of the type:-

1. $p\pi -d\pi$
2. $d\pi -d\pi$
3. $p\pi -p\pi$
4. No multiple bonding

Q. The hybridization of $Xe$ and the number of lone pairs of electrons on it in $Xe{F}_6$ are:

1. $s{p}^3{d}^3,1$
2. $s{p}^3{d}^2,2$
3. $s{p}^3{d}^2,1$
4. $s{p}^3{d}^2,0$