p-Block Elements · Chemistry · AP EAPCET

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 is

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

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.

(D) For thallium, +1 state is more stable than +3 state.

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

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

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

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 the central atom of $x$ is

Identify the incorrect statement about silica.

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 the group 13 elements.

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 $\mathrm{GeCl}_4$.

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

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

Which of the following is not correct?

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

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

The incorrect statement from the following is

Which of the following is not correct?

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

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

Which of the following does not exist?

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

Identify the correct sets

(i) Boron fibres - bullet proof vest

(ii) Metal borides - protective shields

(iii) Borax - glass wool

Correct option 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

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

$\mathrm{P}_2 \mathrm{O}_3+\mathrm{H}_2 \mathrm{O} \rightarrow X$, 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

$$ \mathrm{P}_2 \mathrm{O}_3+\mathrm{H}_2 \mathrm{O} \rightarrow X $$

Which of the following are correct?

i. Basic structural unit of silicates is $-R_2 \mathrm{SiO}-$

ii. Silicones are biocompatible

iii. Producer gas contains CO and $\mathrm{N}_2$

The correct option is

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

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 $x^{-}$?

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. $\mathrm{B}_2 \mathrm{H}_6$ on hydrolysis gives a tribasic acid

Identify the $$P$$ and $$Q$$ of the following reaction

$$P+Q \longrightarrow\left[B(O H)_4\right]^{-}+\mathrm{H}_3 \mathrm{O}^{+}$$

Among $$\mathrm{P}_4, \mathrm{~S}_8$$ and $$\mathrm{N}_2$$ the elements which undergo disproportionation when heated with NaOH solution.

Identify the correct statements about the anomalous behaviour of boron.

I. Boron trihalides can form dimeric structures.

II. Boron shows +1 as stable oxidation state.

III. Maximum covalency of boron is four.

IV. Boron does not form $$\mathrm{BF}_6^{6-}$$ ion.

Which of the following is formed when $$\mathrm{SO}_3$$ is absorbed by concentrated $$\mathrm{H}_2 \mathrm{SO}_4$$ ?

Identify the correct statements about boron.

I. It has high melting point.

II. It has high density.

III. It has high electrical conductivity.

IV. B-10 isotope of it has high ability to absorb neutrons.

Assertion (A) HCl gas is dried by passing through concentrated H$$_2$$SO$$_4$$.

Reason (R) HCl gas reacts with NH$$_3$$ that gives white fumes.

$$\mathrm{H}_3 \mathrm{BO}_3$$ or $$\mathrm{B}(\mathrm{OH})_3$$ is considered as an acid because its molecule

Xenon best reacts with

The correct order of acidic character of the following is

In the following reactions (i) and (ii), the number of moles of chlorine gas released respectively are

(i) $$\mathrm{MnO}_2+4 \mathrm{HCl} \longrightarrow$$

(ii) $$\mathrm{KMnO}_4+16 \mathrm{HCl} \longrightarrow$$

What would be the product of following reaction?

$$\mathrm{SiCl}_4 \stackrel{\text { Excess of } \mathrm{H}_2 \mathrm{O}}{\longrightarrow} \text { ? (Major product) }$$

Identify (P) and (Q) in the following reaction.

Match the following compounds with their corresponding physical properties.