P Block Elements

Consider the oxides of group 14 elements $\mathrm{SiO}_2, \mathrm{GeO}_2, \mathrm{SnO}_2, \mathrm{PbO}_2, \mathrm{CO}$ and $\mathrm{GeO}$. The amphoteric oxides are

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Fluorine forms one oxoacid. Reason R : Fluorine has smallest size amongst all halogens and is highly electronegative. In the light of the above statements, choose the most appropriate answer from the options given below :

White precipitate of AgCl dissolves in aqueous ammonia solution due to formation of :

Beryllium and aluminium exhibit many properties which are similar. But the two elements differ in :

Which one of the following is the correct statement?

The correct statements among I to III regarding group 13 element oxides are, (I) Boron trioxide is acidic. (II) Oxides of aluminium and gallium are amphoteric. (III) Oxides of indium and thalliumare basic.

The reaction of H₃N₃B₃Cl₃ (A) with LiBH₄ in tetrahydrofuran gives inorganic benzene (B). Further, the reaction of (A) with (C) leads to H₃N₃B₃(Me)₃. Compounds (B) and (C) respectively, are :

Boron and silicon of very high purity can be obtained through :

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : In TlI₃, isomorphous to CsI₃, the metal is present in +1 oxidation state. Reason R : Tl metal has fourteen f electrons in its electronic configuration. In the light of the above statements, choose the most appropriate answer from the options given below :

Choose the correct stability order of group 13 elements in their + 1 oxidation state :

Given below are two statements : Statement I: Upon heating a borax bead dipped in cupric sulphate in a luminous flame, the colour of the bead becomes green Statement II: The green colour observed is due to the formation of copper(I) metaborate In light of the above statements, choose the most appropriate answer from the options given below :

Potassium dichromate acts as a strong oxidizing agent in acidic solution. During this process, the oxidation state changes from :

The covalency and oxidation state respectively of boron in $\left[\mathrm{BF}_{4}\right]^{-}$, are :

Given below are two statements : Statement I : Boron is extremely hard indicating its high lattice energy. Statement II : Boron has highest melting and boiling point compared to its other group members. In the light of the above statements, choose the most appropriate answer from the options given below :

A metal (A) on heating in nitrogen gas gives compound B. B on treatment with H₂O gives a colourless gas which when passed through CuSO₄ solution gives a dark blue-violet coloured solution. A and B respectively, are :

For compound having the formula $\mathrm{GaAlCl}_{4}$, the correct option from the following is :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Melting point of Boron (2453 K) is unusually high in group 13 elements. Reason (R) : Solid Boron has very strong crystalline lattice. In the light of the above statements, choose the most appropriate answer from the options given below ;

Given below are two statements: Statement I : Group 13 trivalent halides get easily hydrolyzed by water due to their covalent nature. Statement II : $\mathrm{AlCl}_3$ upon hydrolysis in acidified aqueous solution forms octahedral $\left[\mathrm{Al}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$ ion. In the light of the above statements, choose the correct answer from the options given below :

Give below are two statements: One is labelled as Assertion A and the other is labelled as Reason R: Assertion A: The stability order of +1 oxidation state of $\mathrm{Ga}$, In and $\mathrm{Tl}$ is Ga < In < Tl. Reason R: The inert pair effect stabilizes the lower oxidation state down the group. In the light of the above statements, choose the correct answer from the options given below: