P-block elements practice · Mixed difficulty

Reactions of $\mathrm{HNO}_3$ (conc.) with $\mathrm{I}, \mathrm{S}, \mathrm{P}$ and $\mathrm{C}$ gives respectively:

Which of the following does not exist?

Pyro phosphorus acid $\left( {{H_4}{P_2}{O_5}} \right)$

The element which evolves two gases on reacting with conc. ${\mathrm{H}_2}\mathrm{S}{\mathrm{O}_4}$ is:

Javelle water is:

In which reaction does $S{O_2}$ act as oxidizing agent?

$\text{XeF}_{4}$ reacts with $\mathrm{SbF}_{5}$ to form $\left[\mathrm{XeF}_{\text{m}}\right]^{\text{n}+}\left[\mathrm{SbF}_{\text{y}}\right]^{2-}$.

$\mathrm{m}+\mathrm{n}+\mathrm{y}+\mathrm{z}=\text {? }$

Mg on heating to redness in an atmosphere of ${N_2}$ and then on treating with ${H_2}O$ gives:

In which of the following compound central atom has $+4$ oxidation state?

On heating silver nitrate strongly ……. is obtained finally:

Which $\mathrm{Cl}_2$ gas reacts with cold and dilute sodium hydroxide solution, the oxidation number of chlorine changes from:

Which of the following halogen acids is least basic?

$FeC{l_3}$ solution on reaction with $S{O_2}$ changes to:

Major credit for the discovery of noble gases is given to:

Atomicity of sulphur in rhombic sulphur is

Assertion: $\mathrm{P}_4 \mathrm{O}_{10}$ dehydrates $\mathrm{HNO}_3$.

Reason: In $\mathrm{P}_4 \mathrm{O}_{10}$ oxidation state of $\mathrm{P}$ is +5

In the compounds of type $E\mathrm{C}{\mathrm{l}_3}$, Where $E = \mathrm{ }B,\mathrm{ }P$, $As,\mathrm{ or }Bi,$ the angle $\mathrm{Cl} - E - \mathrm{Cl}$ for different $E$ are in the order :

Which of the following is a nitric acid anhydride

$\mathrm{PC}{\mathrm{l}_5}$ exists but $\mathrm{NC}{\mathrm{l}_5}$ does not because:

The perhalate ion with maximum oxidizing power is:

Assertion (A) : The atomic radii of the elements of the oxygen family are smaller than the atomic radii of the corresponding elements of the nitrogen family.

Reason (R): The members of the oxygen family are more electronegative and thus have lower values of nuclear charge than those of the nitrogen family.

$S{O_2} + 2x \to 2{H_2}O + 3S,$ the compound “$x$” is

In the reaction $K + S{O_2} \to$...., the products are:

General decreasing order of stability of oxides is

In ramsay and rayleigh’s isolation of noble gases from air, the nitrogen of the air is finally converted into

In the reaction,

$HN{O_3} + {P_4}{O_{10}} \to 4HP{O_3} + X$

the product X is

The gas which is absorbed by ferrous sulphate solution giving blackish brown colour is:

Oxidation states of ${P}$ in ${H}_4 {P}_2 {O}_5, {H}_4 {P}_2 {O}_6, {H}_4 {P}_2 {O}_7$ are respectively

Assertion (A): Nitrogen is restricted to a maximum covalency of 4 .

Reason (R):Nitrogen exists as a diatomic molecule (N2)with a triple bond.

Nitrogen dioxide and sulphur dioxide have some properties in common. Which property is shown by one of these compounds, but not by other