P-block elements practice · Medium

Which reaction is not valid?

Which species has the largest dipole moment?

Statement I: Single $\mathrm{N}-\mathrm{N}$ bond is weaker than the single $\mathrm{P}-\mathrm{P}$ bond due to high interelectronic repulsion of the non-bonding electrons, owing to the small bond length.

Statement II: The catenation tendency is stronger in nitrogen as compared to phosphorus.

Which of the following is the correct code for statements below?

(i) Due to small size oxygen has less negative electron gain enthalpy than sulphur.

(ii) Oxygen shows only -2 oxidation state whereas ${S}$, ${Se}$ and Te shows +4 O.S in their compounds with oxygen and +6 with fluorine.

(iii) All hydrides of oxygen family possess reducing property which increases from ${H}_2 {~S}$ to ${H}_2$ $Te$.

(iv) Among hexahalides of group 16 hexafluorides are the onlys table halides.

(v) Dimeric monohalides of group 16 undergo disproportionation.

Which of the following is strongest oxyacid of chlorine?

Assertion: Fluorine forms only one oxo acid $HOF$.

Reason: Fluorine does not have $d$- orbitals in its valence shell.

White phosphorus reacts with thionyl chloride to give

Which of the following combination does not liberate ${NH}_3$ gas?

Nitrogen gas is obtained by thermal decomposition of

Xenon hexafluoride reacts with silica to form a xenon compound X. The oxidation state of xenon in X is

Which of the following orders are correct as per the properties mentioned against each.

The largest bond angle exists in:

Nitrogen forms ${N_2},$ but phosphorous does not form ${P_2},$ however it converts ${P_4},$ reason is

The nitrate which when heated gives-off a gas or a mixture of gases which cannot relight a glowing splinter is:

Which one of the following orders is not in accordance with the property stated against it?

Choose the correct statement among the following

Choose the correct statement:

Assertion: $\mathrm{XeF}_4$ is a good fluorinating agent

Reason: $\mathrm{XeF}_4$ sublimes at $298 \mathrm{~K}$.

Which gas is filled in electric bulbs/tubes?

Assertion (A): ${F}-{F}$ bond in ${F}_2$ molecule is weak.

Reason (R): ${F}$ atom is small in size.

Pure HBr gas may be obtained by heating sodium bromide with syrupy phosphoric acid and not with concentrated sulphuric acid because concentrated sulphuric acid is:

Chlorine acts as a bleaching agent only in presence of

Atomicity of sulphur in rhombic sulphur is

The oxoacid of $\mathrm{S}{\mathrm{O}_2}$ is:

Assertion (A): $\mathrm{Na}_2 \mathrm{S}_2 \mathrm{O}_3$ on reaction with $\mathrm{I}_2$ gives $\mathrm{Na}_2 \mathrm{S}_4 \mathrm{O}_6.$

Reason (R): This reaction involves colour and electronic change Both.

Temperature at which $\alpha$ and $\beta$ forms of sulphur are at equilibrium, is known as

Assertion (A): HI cannot be prepared by the reaction of $\mathrm{KI}$ with conc. $\mathrm{H}_2 \mathrm{SO}_4$.

Reason (R): $\mathrm{HI}$ has lowest $\mathrm{H}-X$ bond strength among halogen acids.

Assertion: Inter-halogen compounds are better oxidising agents than halogens

Reason: $X-X^{\prime}$ bonds are stronger than $X-X$ bonds.

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?