p-Block Elements PYQs - Last 5 Years
JEE Main / Chemistry / Inorganic Chemistry / 140 recent questions
ChemistryInorganic Chemistry2022-2026
Practice 140 JEE Main Chemistry questions from p-Block Elements. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.
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2022-2026
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140 in last 5 years140 in last 10 years
Last 5 Years p-Block Elements Questions
Showing 50 of 140 filtered questions.
1P Block Elements
Choose the correct statements about the hydrides of group 15 elements.
A. The stability of the hydrides decreases in the order \(\mathrm{NH}_3>\mathrm{PH}_3>\mathrm{AsH}_3> \mathrm{SbH}_3>\mathrm{BiH}_3\).
B. The reducing ability of the hyd...
A. The stability of the hydrides decreases in the order \(\mathrm{NH}_3>\mathrm{PH}_3>\mathrm{AsH}_3> \mathrm{SbH}_3>\mathrm{BiH}_3\).
B. The reducing ability of the hyd...
MCQ+4 / -12024
2P Block Elements
A and B formed in the following reactions are:
$$\begin{aligned}
& \mathrm{CrO}_2 \mathrm{Cl}_2+4 \mathrm{NaOH} \rightarrow \mathrm{A}+2 \mathrm{NaCl}+2 \mathrm{H}_2 \mathrm{O}, \\
& \mathrm{A}+2 \mathrm{HCl}+2 \mathrm{H}_2 \mathrm{O}_2 \ri...
$$\begin{aligned}
& \mathrm{CrO}_2 \mathrm{Cl}_2+4 \mathrm{NaOH} \rightarrow \mathrm{A}+2 \mathrm{NaCl}+2 \mathrm{H}_2 \mathrm{O}, \\
& \mathrm{A}+2 \mathrm{HCl}+2 \mathrm{H}_2 \mathrm{O}_2 \ri...
MCQ+4 / -12024
3P Block Elements
Identify the incorrect pair from the following :
MCQ+4 / -12024
4P Block Elements
On passing a gas, '\(\mathrm{X}\)', through Nessler's regent, a brown precipitate is obtained. The gas '\(\mathrm{X}\)' is
MCQ+4 / -12024
5P Block Elements
From the given list, the number of compounds with +4 oxidation state of Sulphur ________.
\(\mathrm{SO}_3, \mathrm{H}_2 \mathrm{SO}_3, \mathrm{SOCl}_2, \mathrm{SF}_4, \mathrm{BaSO}_4, \mathrm{H}_2 \mathrm{S}_2 \mathrm{O}_7\)
\(\mathrm{SO}_3, \mathrm{H}_2 \mathrm{SO}_3, \mathrm{SOCl}_2, \mathrm{SF}_4, \mathrm{BaSO}_4, \mathrm{H}_2 \mathrm{S}_2 \mathrm{O}_7\)
INTEGER+4 / -12024
6P Block Elements
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 crys...
Assertion (A) : Melting point of Boron (2453 K) is unusually high in group 13 elements.
Reason (R) : Solid Boron has very strong crys...
MCQ+4 / -12024
7P Block Elements
Element not showing variable oxidation state is :
MCQ+4 / -12024
8P Block Elements
1 mole of \(\mathrm{PbS}\) is oxidised by "\(\mathrm{X}\)" moles of \(\mathrm{O}_3\) to get "\(\mathrm{Y}\)" moles of \(\mathrm{O}_2\). \(\mathrm{X}+\mathrm{Y}=\) _________.
INTEGER+4 / -12024
9P Block Elements
Given below are two statements :
Statement (I) : Oxygen being the first member of group 16 exhibits only -2 oxidation state.
Statement (II) : Down the group 16 stability of +4 oxidation state decreases and +6 oxidation state increases.
In t...
Statement (I) : Oxygen being the first member of group 16 exhibits only -2 oxidation state.
Statement (II) : Down the group 16 stability of +4 oxidation state decreases and +6 oxidation state increases.
In t...
MCQ+4 / -12024
10P Block Elements
Among the following oxides of p-block elements, number of oxides having amphoteric nature is ________.$\mathrm{Cl}_2 \mathrm{O}_7, \mathrm{CO}, \mathrm{PbO}_2, \mathrm{~N}_2 \mathrm{O}, \mathrm{NO}, \mathrm{Al}_2 \mathrm{O}_3, \mathrm{SiO}_...
INTEGER+4 / -12024
11P Block Elements
The strongest reducing agent among the following is :
MCQ+4 / -12024
12P Block Elements
Given below are two statements :
Statement (I) : $\mathrm{SiO}_2$ and $\mathrm{GeO}_2$ are acidic while $\mathrm{SnO}$ and $\mathrm{PbO}$ are amphoteric in nature.
Statement (II) : Allotropic forms of carbon are due to property of catenatio...
Statement (I) : $\mathrm{SiO}_2$ and $\mathrm{GeO}_2$ are acidic while $\mathrm{SnO}$ and $\mathrm{PbO}$ are amphoteric in nature.
Statement (II) : Allotropic forms of carbon are due to property of catenatio...
MCQ+4 / -12024
13P Block Elements
\(\mathrm{XeF}_{4}\) reacts with \(\mathrm{SbF}_{5}\) to form
\([\mathrm{XeF}_{m}]^{\mathrm{n}+}\left[\mathrm{SbF}_{y}\right]^{z-}\).
\(\mathrm{m}+\mathrm{n}+\mathrm{y}+\mathrm{z}=\) __________
\([\mathrm{XeF}_{m}]^{\mathrm{n}+}\left[\mathrm{SbF}_{y}\right]^{z-}\).
\(\mathrm{m}+\mathrm{n}+\mathrm{y}+\mathrm{z}=\) __________
INTEGER+4 / -12023
14P Block Elements
The ratio of sigma and \(\pi\) bonds present in pyrophosphoric acid is ___________.
INTEGER+4 / -12023
15P Block Elements
Match List I with List II
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...
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MCQ+4 / -12023
16P Block Elements
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) metabor...
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) metabor...
MCQ+4 / -12023
17P Block Elements
The Lewis acid character of boron tri halides follows the order :
MCQ+4 / -12023
18P Block Elements
Boric acid is solid, whereas $\mathrm{BF}_3$ is gas at room temperature because of :
MCQ+4 / -12023
19P Block Elements
"A" obtained by Ostwald's method involving air oxidation of NH\(_3\), upon further air oxidation produces "B", "B" on hydration forms an oxoacid of Nitrogen along with evolution of "A". The oxoacid also produces "A" and gives positive brown...
MCQ+4 / -12023
20P Block Elements
During the borax bead test with \(\mathrm{CuSO_4}\), a blue green colour of the bead was observed in oxidising flame due to the formation of :
MCQ+4 / -12023
21P Block Elements
Compound A reacts with NH\(_4\)Cl and forms a compound B. Compound B reacts with H\(_2\)O and excess of CO\(_2\) to form compound C which on passing through or reaction with saturated NaCl solution forms sodium hydrogen carbonate. Compound ...
MCQ+4 / -12023
22P Block Elements
Reaction of thionyl chloride with white phosphorus forms a compound [A], which on hydrolysis gives [B], a dibasic acid. [A] and [B] are respectively :
MCQ+4 / -12023
23P Block Elements
Potassium dichromate acts as a strong oxidizing agent in acidic solution. During this process, the oxidation state changes from :
MCQ+4 / -12023
24P Block Elements
A. Ammonium salts produce haze in atmosphere.
B. Ozone gets produced when atmospheric oxygen reacts with chlorine radicals.
C. Polychlorinated biphenyls act as cleansing solvents.
D. 'Blue baby' syndrome occurs due to the presence of excess...
B. Ozone gets produced when atmospheric oxygen reacts with chlorine radicals.
C. Polychlorinated biphenyls act as cleansing solvents.
D. 'Blue baby' syndrome occurs due to the presence of excess...
MCQ+4 / -12023
25P Block Elements
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion A : Carbon forms two important oxides - CO and CO\(_2\). CO is neutral whereas CO\(_2\) is acidic in nature
Reason R : CO\(_2\) c...
Assertion A : Carbon forms two important oxides - CO and CO\(_2\). CO is neutral whereas CO\(_2\) is acidic in nature
Reason R : CO\(_2\) c...
MCQ+4 / -12023
26P Block Elements
Which of the Phosphorus oxoacid can create silver mirror from \(\mathrm{AgNO_3}\) solution?
MCQ+4 / -12023
27P Block Elements
Sum of \(\pi\)-bonds present in peroxodisulphuric acid and pyrosulphuric acid is ___________
INTEGER+4 / -12023
28P Block Elements
\(\mathrm{K_2Cr_2O_7}\) paper acidified with dilute \(\mathrm{H_2SO_4}\) turns green when exposed to :
MCQ+4 / -12023
29P Block Elements
Given below are two statements:
Statement I : Chlorine can easily combine with oxygen to form oxides; and the product has a tendency to explode.
Statement II : Chemical reactivity of an element can be determined by its reaction with oxygen ...
Statement I : Chlorine can easily combine with oxygen to form oxides; and the product has a tendency to explode.
Statement II : Chemical reactivity of an element can be determined by its reaction with oxygen ...
MCQ+4 / -12023
30P Block Elements
For electron gain enthalpies of the elements denoted as \(\Delta_{\mathrm{eg}} \mathrm{H}\), the incorrect option is :
MCQ+4 / -12023
31P Block Elements
The correct order of bond enthalpy (\(\mathrm{kJ~mol^{-1}}\)) is :
MCQ+4 / -12023
32P Block Elements
For a good quality cement, the ratio of silica to alumina is found to be :
MCQ+4 / -12023
33P Block Elements
During water-gas shift reaction
MCQ+4 / -12023
34P Block Elements
The incorrect statement from the following for borazine is :
MCQ+4 / -12023
35P Block Elements
If the formula of Borax is \(\mathrm{Na_2B_4O_x(OH)_y~.~zH_2O}\), then \(x+y+z=\) ___________
INTEGER+4 / -12023
36P Block Elements
The covalency and oxidation state respectively of boron in \(\left[\mathrm{BF}_{4}\right]^{-}\), are :
MCQ+4 / -12023
37P Block Elements
The correct group of halide ions which can be oxidised by oxygen in acidic medium is :
MCQ+4 / -12023
38P Block Elements
Given below are two statements :
Statement I : \(\mathrm{SbCl}_{5}\) is more covalent than \(\mathrm{SbCl}_{3}\)
Statement II: The higher oxides of halogens also tend to be more stable than the lower ones.
In the light of the above statemen...
Statement I : \(\mathrm{SbCl}_{5}\) is more covalent than \(\mathrm{SbCl}_{3}\)
Statement II: The higher oxides of halogens also tend to be more stable than the lower ones.
In the light of the above statemen...
MCQ+4 / -12023
39P Block Elements
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,...
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,...
MCQ+4 / -12023
40P Block Elements
For compound having the formula \(\mathrm{GaAlCl}_{4}\), the correct option from the following is :
MCQ+4 / -12023
41P Block Elements
One mole of \(\mathrm{P}_{4}\) reacts with 8 moles of \(\mathrm{SOCl}_{2}\) to give 4 moles of \(\mathrm{A}, x\) mole of \(\mathrm{SO}_{2}\) and 2 moles of \(\mathrm{B} . \mathrm{A}, \mathrm{B}\) and \(x\) respectively are :
MCQ+4 / -12023
42P Block Elements
Which one of the following pairs is an example of polar molecular solids?
MCQ+4 / -12023
43P Block Elements
In the following reactions, the total number of oxygen atoms in X and Y is ___________.
Na\(_2\)O + H\(_2\)O \(\to\) 2X
Cl\(_2\)O\(_7\) + H\(_2\)O \(\to\) 2Y
Na\(_2\)O + H\(_2\)O \(\to\) 2X
Cl\(_2\)O\(_7\) + H\(_2\)O \(\to\) 2Y
INTEGER+4 / -12023
44P Block Elements
The difference in the oxidation state of \(\mathrm{Xe}\) between the oxidised product of \(\mathrm{Xe}\) formed on complete hydrolysis of \(\mathrm{XeF}_{4}\) is ___________
INTEGER+4 / -12023
45P Block Elements
A \(\mathrel{\mathop{\kern0pt\longrightarrow}
\limits_{}^{573\,K}}\) Red phosphorus \(\mathrel{\mathop{\kern0pt\longrightarrow}
\limits_{under\,pressure}^{heat\,;\,803\,K}}\) B
Red phosphorus is obtained by heating "A" at 573 K, and can b...
Red phosphorus is obtained by heating "A" at 573 K, and can b...
MCQ+4 / -12022
46P Block Elements
The oxoacid of phosphorus that is easily obtained from a reaction of alkali and white phosphorus and has two P-H bonds, is :
MCQ+4 / -12022
47P Block Elements
Match List-I with List-II.
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overflow:hidden;padding:10px 5px;word-break:normal;}...
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MCQ+4 / -12022
48P Block Elements
Sulphur dioxide is one of the components of polluted air. SO2 is also a major contributor to acid rain. The correct and complete reaction to represent acid rain caused by SO2 is :
MCQ+4 / -12022
49P Block Elements
Aqueous solution of which of the following boron compounds will be strongly basic in nature?
MCQ+4 / -12022
50P Block Elements
Consider the following sulphur based oxoacids.
\(\mathrm{H}_{2} \mathrm{SO}_{3}, \mathrm{H}_{2} \mathrm{SO}_{4}, \mathrm{H}_{2} \mathrm{S}_{2} \mathrm{O}_{8}\) and \(\mathrm{H}_{2}\mathrm{S}_{2} \mathrm{O}_{7}\).
Amongst these oxoacids, the...
\(\mathrm{H}_{2} \mathrm{SO}_{3}, \mathrm{H}_{2} \mathrm{SO}_{4}, \mathrm{H}_{2} \mathrm{S}_{2} \mathrm{O}_{8}\) and \(\mathrm{H}_{2}\mathrm{S}_{2} \mathrm{O}_{7}\).
Amongst these oxoacids, the...
INTEGER+4 / -12022