p-Block Elements

Treatment of a gas 'X' with a freshly prepared ferrous sulphate solution gives a compound 'Y' as a brown ring. The compounds X and Y are.

The correct set that contains all kinds (basic, acidic, amphoteric and neutral) of oxides is :

Given below are two statements: Statement I: The covalency of oxygen is generally two but it can exceed upto four. The oxidation state of oxygen in $\mathrm{SO_2}$ is $-2$ and in $\mathrm{OF_2}$ it is $+2$. Statement II: The anomalous behaviour of oxygen when compared to the other elements of group 16 is due to its small size and high electronegativity. In the light of the above statements, choose the correct answer from the options given below

The electronegativity of a group 13 element 'E' is same as that of Ge (on Pauling scale and upto one decimal point). The CORRECT statements about $\mathrm{E^{3+}}$ are A. It can act as a reducing agent. B. It can act as an oxidizing agent. C. $\mathrm{E^{3+}}$ is more stable than $\mathrm{E^+}$. D. The standard electrode potential value for $\mathrm{E^{3+}/E}$ is positive. Choose the correct answer from the options given below:

Correct statements from the following are: A. Nitrogen in oxidation states from +1 to +4 disproportionates in acid medium. B. Nitrogen has the ability to form $d\pi - p\pi$ multiple bonds with itself and other elements with small size and high electronegativity. C. N-N single bond is stronger than P-P single bond. D. Nitrogen has highest density in its group due to small size. E. The maximum covalency of nitrogen is four since it has only four valence orbitals for bonding. Choose the correct answer from the options given below:

Given below are two statements : Statement I : Aluminium upon reaction with NaOH forms $[\mathrm{Al(OH)_6}]^{3-}$ ion. Statement II : The geometry of $\mathrm{ICl_4^-}$, $\mathrm{ClO_3^-}$ and $\mathrm{IBr_2^-}$ is square planar, pyramidal and linear respectively. In the light of the above statements, choose the correct answer from the options given below :

Given below are two statements: Statement I: Aluminium is more electropositive than thallium as the standard electrode potential value of $E^\circ_{\mathrm{Al^{3+}/Al}}$ is negative and $E^\circ_{\mathrm{Tl^{3+}/Tl}}$ is positive. Statement II: The sum of first three ionization enthalpies of boron is very high when compared to that of aluminium. Due to this reason boron forms covalent compounds only and aluminium forms $\mathrm{Al^{3+}}$ ion. In the light of the above statements, choose the correct answer from the options given below

Find the correct statements related to group 15 hydrides. A. Reducing nature increases from $\mathrm{NH_3}$ to $\mathrm{BiH_3}$. B. Tendency to donate lone pair of electrons decreases from $\mathrm{NH_3}$ to $\mathrm{BiH_3}$. C. The stability of hydrides decreases from $\mathrm{NH_3}$ to $\mathrm{BiH_3}$. D. HEH bond angle decreases from $\mathrm{NH_3}$ to $\mathrm{SbH_3}$ (E = Elements of group 15). Choose the correct answer from the options given below :

Which of the following electrolyte can be used to obtain $\mathrm{H_2S_2O_8}$ by the process of electrolysis?

The maximum covalency of a non-metallic group 15 element 'E' with weakest E–E bond is :