p-Block Elements

Complete hydrolysis of xenon hexafluoride gives HF along with compound $X$. The hybridisation in $X$ is

The number of amphoteric oxides from the following is $\mathrm{CO}_2, \mathrm{GeO}_2, \mathrm{SnO}_2, \mathrm{PbO}_2$, $\mathrm{CO}, \mathrm{GeO}, \mathrm{SnO}, \mathrm{PbO}$

Select the correct statements from the following
(A) Aluminium liberates $\mathrm{H}_2$ gas with dil. HCl but not with aqueous NaOH .
(B) Formula of sodium metaborate is $\mathrm{Na}_3 \mathrm{BO}_3$.
(C) Boric acid is a weak monobasic acid...

Orthophosphorus acid on disproportionation gives $\mathrm{PH}_3$ and another oxoacid of phosphorus ' $X$ '. The basicity of $X$ is

The conjugate base of phosphorus acid is $x$. The conjugate base of oleum is $y$. What are $x$ and $y$, respectively?

Consider the following
Statement-I $\mathrm{CCl}_4$ does not undergo hydrolysis. But $\mathrm{SiCl}_4$ undergoes hydrolysis.
Statement-II Thermal and chemical stability of $\mathrm{GeX}_4$ is more than $\mathrm{GeX}_2$.
The correct answer i...

Observe the following
$\mathrm{P}_4+\mathrm{SOCl}_2 \rightarrow$ Products
$\mathrm{P}_4+\mathrm{SO}_2 \mathrm{Cl}_2 \rightarrow$ Products
In both the reactions, a common product ' $x$ ' is obtained. The number of lone pair of electrons on t...

The correct order of electronegativity of group 13 elements is

Identify the correct statements.
I. CO reduces the oxygen carrying ability of blood
II. Producer gas contains CO and $\mathrm{N}_2$
III. $\mathrm{C}-\mathrm{O}$ bond length in $\mathrm{CO}_2$ is 115 pm

The number of $\mathrm{P}=\mathrm{O}, \mathrm{P}-\mathrm{P}$ bonds present in oxoacid of phosphorus, prepared by treating red $\mathrm{P}_4$ with alkali are respectively

Identify the incorrect statement about silica.

Identify the reaction in which diborane is produced on industrial scale?

Which of the following is not correct?

Nature of two oxides of nitrogen $X$ and $Y$ formed in the reaction of sodium nitrite with hydrochloric acid is

Which of the following statements are correct?
(I) $\mathrm{SnF}_4$ is ionic in nature.
(II) Stability of dihalides of group 14 elements increases down the group.
(III) $\mathrm{GeCl}_2$ is more stable than $\mathrm{GeCl}_4$.

Identify the incorrect statement about the group 13 elements.

In Buckminster fullerene, the number of six membered carbon rings is ' $x$ ' and five membered carbon rings is ' $y$ '. $(x+y)$ value is

Which of the following is not correct?

The incorrect statement from the following is

White phosphorus on heating with concentrated NaOH solution in an inert atmosphere of $\mathrm{CO}_2$ gives a salt ' $X$ ' and gas ' $Y$ '. The oxidation state of central atom in $X$ and $Y$ is respectively

Consider the following.
Statement I : $ \mathrm{Al}_2 \mathrm{O}_3$ is amphoteric in nature.
Statement II : Tl2 $\mathrm{O}_3$ is more basic than $\mathrm{Ga}_2 \mathrm{O}_3$. The correct answer is

In the structure of diborane, the number of 2-centre-2-electron bonds is $X$ and 3-centre-2-electron bonds is $Y$. The value of $(X+Y)$ is

The oxides of nitrogen obtained by the reaction of nitric acid with (i) $\mathrm{P}_4 \mathrm{O}_{10'}$ (ii) $\mathrm{P}_4$ respectively are

Which of the following does not exist?

Consider the following -
Statement I : The order of electronegativity of $\mathrm{B}, \mathrm{Al}$, In Tl is \(\mathrm{B}>\mathrm{Tl}>\mathrm{Al}>\mathrm{In}\)
Statement II : Boric acid is a weak protonic acid.
The correct answer is

Gas $X$ is obtained in Deacon's process. X on reacting with iodine and water gives

Hydrolysis of $\mathrm{XeF}_4$ gives $\mathrm{HF}, \mathrm{O}_2, \mathrm{Xe}$ and ' $X$ '. The structure of ' $X$ ' is

Identify the correct sets
(i) Boron fibres - bullet proof vest
(ii) Metal borides - protective shields
(iii) Borax - glass wool
Correct option is

Two of the products formed by the reaction of ' $X$ with HCl are gases. What is ' $X$ '?

In which of the following sets allotropes of carbon are correctly matched with their uses?
i. Graphite - Crucibles
ii. Activated charcoal - Water filters
iii. Carbon black - Fuel
The correct answer is

Two statements are given below.
Statement I : $\mathrm{SnF}_4, \mathrm{PbF}_4$ are ionic in nature.
Statement II : GeCl ${ }_2$ is more stable than $\mathrm{GeCl}_4$
The correct answer is

A Lewis acid ' $X$ ' reacts with $\mathrm{LiAlH}_4$ in ether medium to give a highly toxic gas. ${ }^{\prime} Y^{\prime}$, ' $Y$ ' when heated with $\mathrm{NH}_3$ gives a compound known as inorganic benzene. ' $Y^{\prime}$ burns in oxygen ...

$\mathrm{P}_2 \mathrm{O}_3+\mathrm{H}_2 \mathrm{O} \rightarrow X$, Red $\mathrm{P}_4+$ alkali $\rightarrow Y$
$X, Y$ are oxoacids of phosphorous. The number of $\mathrm{P}-\mathrm{OH}$ bonds in $X, Y$ respectively is
$$ \mathrm{P}_2 \mathrm...

Hydrated sodium aluminium silicate is called

Which of the allotropic forms of carbon is aromatic in nature?

' $X$ ' on hydrolysis gives two products. One of them is solid. What is ' $X$ '?

Which of the following reactions give phosphine?
i. Reaction of calcium phosphide with water
ii. Heating white phosphorous with concentrated NaOH solution in inert atmosphere
iii. Heating red phosphorous with alkali

Which of the following are correct?i. Basic structural unit of silicates is $-R_2 \mathrm{SiO}-$ii. Silicones are biocompatibleiii. Producer gas contains CO and $\mathrm{N}_2$The correct option is

Identify the correct statements
i. Oxidation of $\mathrm{NaBH}_4$ with $\mathrm{I}_2$ gives $\mathrm{B}_2 \mathrm{H}_6$
ii. $\mathrm{B}_2 \mathrm{H}_6$ burns in oxygen and releases an enormous amount of energy
iii. $\mathrm{B}_2 \mathrm{H}_...

Observe the following stoichiometric equation
\(\mathrm{P}_4+3 \mathrm{OH}^{-}+3 \mathrm{H}_2 \mathrm{O} \rightarrow \mathrm{PH}_3+3 x^{-}\)
What is the conjugate acid of $x^{-}$?

The disproportionation products of ortho phosphorus acid are

When chlorine reacts with hot and conc. NaOH . The products formed are

Aluminium carbide on reaction with $\mathrm{D}_2 \mathrm{O}$ gives $\mathrm{Al}(O D)_3$ and ' $X^{\prime}$. What is ' $X^{\prime}$ '?

For ozone molecule consider the following.
It is a linear molecule with bond angle $180^{\circ}$.
It is an angular molecule with bond angle $117^{\circ}$.
The bond lengths of both $\mathrm{O}-\mathrm{O}$ bonds are same.
With respect to oxyg...

Choose the acidic oxide from the following.

\(\text { Match the following. }\)
.tg {border-collapse:collapse;border-spacing:0;}
.tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px;
overflow:hidden;padding:10px 5px;word-break...

Among the following the correct statements are
I. Germanium exists only in traces.
II. $\mathrm{PbF}_4$ molecule is tetrahedral in shape.
III. $\mathrm{GeX}_2$ is more stable than $\mathrm{GeX}_4$.
The correct answer is

Identify the reaction in which oxygen is not one of the products.

The correct order of melting points of Al, Ga, In is

Identify the \(P\) and \(Q\) of the following reaction
\(P+Q \longrightarrow\left[B(O H)_4\right]^{-}+\mathrm{H}_3 \mathrm{O}^{+}\)