p-Block Elements — JEE Main PYQs

The number of interhalogens from the following having square pyramidal structure is:
${\text{ClF}}_3$, ${\text{IF}}_7$, ${\text{BrF}}_5$, ${\text{BrF}}_3$, ${\text{I}}_2{\text{Cl}}_6$, ${\text{IF}}_5$, $\text{ClF}$, ${\text{ClF}}_5$

White phosphorus reacts with thionyl chloride to give

Concentrated ${\mathrm{HNO}}_3$ reacts with Iodine to give

Dinitrogen and dioxygen. the main constituents of air do not react with each other in atmosphere to form oxides of nitrogen because

Which oxoacid of phosphorous has the highest number of oxygen atoms present in its chemical formula?

The interhalogen compound formed from the reaction of bromine with excess of fluorine is a :

The metal that has very low melting point and its periodic position is closer to a metalloid is :

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : Boric acid is a weak acid
Reason R : Boric acid is not able to release ${\mathrm{H}}^{+}$ ion on its own. It receives ${\mathrm{OH}}^{-}$ ion from water and releases …

The number of non-ionisable protons present in the product B obtained from the following reaction is ____.
$\mathrm{C}{}_2\mathrm{H}{}_5\mathrm{OH}+\mathrm{PCl}{}_3\to \mathrm{C}{}_2\mathrm{H}{}_5\mathrm{Cl}+\mathrm{A}$
$\mathrm{A}+\mathrm{PCl}{}_3\to \mathrm{B}$

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R)

Assertion (A): Boron is unable to form ${\mathrm{BF}}_6^{3-}$
Reason (R): Size of B is very small.
In the light of the above statements, choose the correct answer from the …

Match List I with List II :
| C. ${\mathrm{XeOF}}_4$ | III. …

The total number of acidic oxides from the following list is: NO, ${\mathrm{N}}_2\mathrm{O},{\mathrm{B}}_2{\mathrm{O}}_3,{\mathrm{N}}_2{\mathrm{O}}_5,\mathrm{CO}$, ${\mathrm{SO}}_3,{\mathrm{P}}_4{\mathrm{O}}_{10}$

The sum of number of lone pairs of electrons present on the central atoms of ${\mathrm{XeO}}_3$, ${\mathrm{XeOF}}_4$ and ${\mathrm{XeF}}_6$ is ____

Borazine, also known as inorganic benzene, can be prepared by the reaction of 3-equivalents of "X" with 6-equivalents of "Y". "X" and "Y", respectively are:

Among the given oxides of nitrogen; ${\mathrm{N}}_2\mathrm{O},{\mathrm{N}}_2{\mathrm{O}}_3$, ${\mathrm{N}}_2{\mathrm{O}}_4$ and ${\mathrm{N}}_2{\mathrm{O}}_5$, the number of compound/(s) having $\mathrm{N}-\mathrm{N}$ bond is :

Which of the following oxoacids of sulphur contains "S" in two different oxidation states?

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : Flourine forms one oxoacid.
Reason R : Flourine has smallest size amongst all halogens and is highly electronegative

In the light of the above statements, choose …

Nitrogen gas is obtained by thermal decomposition of

Given below are two statements:
Statement-I: The pentavalent oxide of group-15 element, ${\mathrm{E}}_2{\mathrm{O}}_5$, is less acidic than trivalent oxide, ${\mathrm{E}}_2{\mathrm{O}}_3$, of the same element.
Statement-II: The acidic character of trivalent oxide of group 15 elem …

Aqueous solution of which of the following boron compounds will be strongly basic in nature?

The oxoacid of phosphorus that is easily obtained from a reaction of alkali and white phosphorus and has two P-H bonds, is :

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

The correct order of melting points of hydrides of group 16 elements is :

Consider the following reaction :

A + alkali $\to$ B (Major Product)
If B is an oxoacid of phosphorus with no $\mathrm{P}-\mathrm{H}$ bond, then A is :

Match List-I with List-II

List-I (Si-Compounds):
(A) ${\left({\mathrm{CH}}_3\right)}_4\mathrm{Si}$
(B) $\left({\mathrm{CH}}_3\right)\mathrm{Si}(\mathrm{OH}{)}_3$
(C) ${\left({\mathrm{CH}}_3\right)}_2\mathrm{Si}(\mathrm{OH}{)}_2$
(D) …

Heating white phosphorus with conc. NaOH solution gives mainly

The highest industrial consumption of molecular hydrogen is to produce compounds of element:

The most stable trihalide of nitrogen is:

${\mathrm{PCl}}_5$ is well known, but ${\mathrm{NCl}}_5$ is not. Because.

The number of bridged oxygen atoms present in compound B formed from the following reactions is
$\mathrm{Pb}({\mathrm{NO}}_3{)}_2\stackrel{673\mathrm{K}}{\to }\mathrm{A}+\mathrm{PbO}+{\mathrm{O}}_2$
$\mathrm{A}\stackrel{\text{ Dimerise }}{\to }\mathrm{B}$

Consider the following reactions:
${\mathrm{PCl}}_3+{\mathrm{H}}_2\mathrm{O}⟶\mathrm{A}+\mathrm{HCl}$
$\mathrm{A}+{\mathrm{H}}_2\mathrm{O}⟶\mathrm{B}+\mathrm{HCl}$
number of ionisable protons present in the product B ______.

Given below are two statements :

Statement I : Colourless cupric metaborate is reduced to cuprous metaborate in a luminous flame.
Statement II : Cuprous metaborate is obtained by heating boric anhydride and copper sulphate in a non-luminous flame.
In the light of the above state …

The incorrect statement is:

$A{B}_3$ is an interhalogen T-shaped molecule. The number of lone pairs of electrons on A is ______. (Integer answer)

The number of non-ionisable hydrogen atoms present in the final product obtained from the hydrolysis of ${\mathrm{PCl}}_5$ is:

Chalcogen group elements are:

Chemical nature of the nitrogen oxide compound obtained from a reaction of concentrated nitric acid and ${\mathrm{P}}_4{\mathrm{O}}_{10}$ (in 4:1 ratio) is:

The set in which compounds have different nature is:

The species given below that does NOT show disproportionation reaction is:

Among the following allotropic forms of sulphur, the number of allotropic forms, which will show paramagnetism is $\_\_\_\_$
(A) $\alpha$ - sulphur
(B) $\beta$ - sulphur
(C) ${\mathrm{S}}_2$ - form

Outermost electronic configuration of a group 13 element, E , is $4s^2,4p^1$. The electronic configuration of an element of p -block period-five placed diagonally to element, E is:

Which one of the following is formed (mainly) when red phosphorus is heated in a sealed tube at 803 K ?

Which one of the following is used to remove most of plutonium from spent nuclear fuel?

Among the following, the number of halide(s) which is / are inert to hydrolysis is ____
(A) ${\mathrm{BF}}_3$
(B) ${\mathrm{SiCl}}_4$
(C) ${\mathrm{PCl}}_5$
(D) ${\mathrm{SF}}_6$

Given below are the statements about diborane.
(a) Diborane is prepared by the oxidation of ${\mathrm{NaBH}}_4$ with ${\mathrm{I}}_2$.
(b) Each boron atom is in ${\mathrm{sp}}^2$ hybridized state.
(c) Diborane has one bridged 3 centre-2-electron bond.
(d) Diborane is a planar mol …

Which one of the following group - 15 hydride is the strongest reducing agent?

On treating a compound with warm dil. ${\mathrm{H}}_2{\mathrm{SO}}_4$, gas X is evolved which turns ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$ paper acidified with dil. ${\mathrm{H}}_2{\mathrm{SO}}_4$ to a green compound Y. X and Y respectively are:

Compound A used as a strong oxidizing agent is amphoteric in nature. It is the part of lead storage batteries. Compound A is :

Match List-I with List-II:
List-I (Species)
List-II (Number of lone pairs of electrons on the central atom)
(a) ${\mathrm{XeF}}_2$
(b) ${\mathrm{XeO}}_2{\mathrm{F}}_2$
(c) ${\mathrm{XeO}}_3{\mathrm{F}}_2$
(d) ${\mathrm{XeF}}_4$
(i) 0
(ii) 1
(iii) 2
(iv) 3
Choose the most approp …

In polythionic acid, ${\mathrm{H}}_2{\mathrm{S}}_{\mathrm{x}}{\mathrm{O}}_6(\mathrm{x}=3$ to 5$)$ the oxidation state(s) of sulphur is/are :