P-block elements practice · Mixed difficulty

Assertion (A): The gas phase reaction, $\mathrm{PCl}_3(\mathrm{~g})+\mathrm{Cl}_2(\mathrm{~g}) \rightleftharpoons \mathrm{PCl}_5(\mathrm{~g}) ; \Delta \mathrm{H}=-32.8 \mathrm{~k~cal} \mathrm{~mol}^{-1}$ shifts to the right direction on increasing temperature.

Reason (R): When temperature increases, equilibrium shifts towards right for an endothermic reaction.

Which of the following forms vortex ring?

Assertion: Both the $\mathrm{S}-\mathrm{O}$ bonds in sulphur dioxide are equal.

Reason: Sulphur dioxide molecule exhibits resonance.

Which of the following compound is added to the sodium extract before addition of silver nitrate for testing of halogens?

The word neon signifies:

The correct order of $Cl - O$ bond order is

Which of the following statements are correct?

(i) Arsenic and antimony are metalloids.

(ii) Phosphorus, arsenic and antimony are found mainly as sulphide minerals.

(iii) Covalent redii increases equally from ${N}$ to Bi.

(iv) Elements of group 15 have extra stability and higher ionisation energy due to exactly half filled $n s^2 n p^3$ electronic configuration.

(v) In group 15 elements only nitrogen is gas whereas all others are solids.

Which of the following statements are incorrect for ${XeOF}_4?$
A. It has a square planar structure
B. It has a square pyramidal structure
C. It has pentagonal bipyramidal structure
D. It has 2 lone pair of electrons around Xenon

The discovery of isotopes began with the experiments with:

Which of the following chemical reaction does not represents the oxidising behaviour of $\mathrm{H}_2 \mathrm{SO}_4$ ?

The type of hybridisation and number of lone pairs
of electrons on $Xe$ in $XeO{F_4},$ respectively, are :

The starting material in Birkeland and Eyde’s process for the manufacture of $HN{O_3}$ is:

Assertion (A): $\mathrm{NH}_3$ is more polar than $\mathrm{NF}_3.$

Reason (R): $\mathrm{NF}_3$ cannot be hydrolysed.

Which of the following pair of molecules does not have identical structure?

In ordinary $C{l_2}$ gas $C{l^{35}}$ and $C{l^{37}}$ are in the ratio:

Conc. $\mathrm{HN}{\mathrm{O}_3}$ reacts with iron to:

Which of the following is the weakest Lewis base?

Ozone acts as:

Assertion: Conc. $\mathrm{H}_2 \mathrm{SO}_4$ on addition to $\mathrm{HCOOH}$ liberates $\mathrm{CO}$.

Reason: Hot conc. $\mathrm{H}_2 \mathrm{SO}_4$ is a moderate oxidising agent.

Colloidal sulphur is obtained by the action of $HN{O_3}$ on.

Oil of vitriol is

$PC{l_3}$ on hydrolysis gives

Name the last radioactive element of noble gas
family.

Assertion : ${HOF}$ bond angle in ${HFO}$ is higher than ${HOCl}$ bond angle in ${HClO}$.

Reason : Oxygen is more electronegative than halogens.

The solution of phosphine in water
decomposes in the presence of light
giving

The number of electrons present in the valency shell of P in $PC{l_3}$ is

Assertion (A): $\mathrm{NH}_4 \mathrm{NO}_3,$ on heating gives $\mathrm{NH}_3$

Reason (R): $\mathrm{NO}_3^{-}$ is an oxidising anion.

In the preparation of sulphuric acid, $\mathrm{V}_2 \mathrm{O}_5$ is used in the reaction, which is

In the known interhalogen compounds the maximum number of halogen atoms is:

Metal halide which is insoluble in water is