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p-Block Elements

340 Questions
All Exams JEE Mains JEE Advanced
2022 JEE Mains MCQ
JEE Main 2022 (Online) 28th June Morning Shift

Nitrogen gas is obtained by thermal decomposition of :

A.
Ba(NO3)2
B.
Ba(N3)2
C.
NaNO2
D.
NaNO3
2022 JEE Mains MCQ
JEE Main 2022 (Online) 28th June Morning Shift

Given below are two statements :

Statement I : The pentavalent oxide of group-15 element, E2O5, is less acidic than trivalent oxide, E2O3, of the same element.

Statement II : The acidic character of trivalent oxide of group 15 elements, E2O3, decreases down the group.

In light of the above statements, choose most appropriate answer from the options given below :

A.
Both Statement I and Statement II are true.
B.
Both Statement I and Statement II are false.
C.
Statement I is true, but Statement II is false.
D.
Statement I is false, but Statement II is true.
2022 JEE Mains MCQ
JEE Main 2022 (Online) 27th June Evening Shift

The gas produced by treating an aqueous solution of ammonium chloride with sodium nitrite is :

A.
NH3
B.
N2
C.
N2O
D.
Cl2
2022 JEE Mains MCQ
JEE Main 2022 (Online) 27th June Evening Shift

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 :

A.
Both A and R are correct and R is the correct explanation of A.
B.
Both A and R are correct but R is NOT the correct explanation of A.
C.
A is correct but R is not correct.
D.
A is not correct but R is correct.
2022 JEE Mains MCQ
JEE Main 2022 (Online) 27th June Morning Shift

Match List - I with List - II.

List - I
(Si-Compounds)		 List - II
(Si-Polymeric/Other Products
(A) ${(C{H_3})_4}Si$ (I) Chain Silicone
(B) $(C{H_3})Si{(OH)_3}$ (II) Dimeric Silicone
(C) ${(C{H_3})_2}Si{(OH)_2}$ (III) Silane
(D) ${(C{H_3})_3}Si(OH)$ (IV) 2D - Silicone

Choose the correct answer from the options given below :

A.
(A) - (III), (B) - (II), (C) - (I), (D) - (IV)
B.
(A) - (IV), (B) - (I), (C) - (II), (D) - (III)
C.
(A) - (II), (B) - (I), (C) - (IV), (D) - (III)
D.
(A) - (III), (B) - (IV), (C) - (I), (D) - (II)
2022 JEE Mains MCQ
JEE Main 2022 (Online) 27th June Morning Shift

Heating white phosphorus with conc. NaOH solution gives mainly :

A.
Na3P and H2O
B.
H3PO and NaH
C.
P(OH)3 and NaH2PO4
D.
PH3 and NaH2PO2
2022 JEE Mains MCQ
JEE Main 2022 (Online) 26th June Evening Shift

Which of the following elements is considered as a metalloid?

A.
Sc
B.
Pb
C.
Bi
D.
Te
2022 JEE Mains MCQ
JEE Main 2022 (Online) 26th June Evening Shift

The oxide which contains an odd electron at the nitrogen atom is :

A.
N2O
B.
NO2
C.
N2O3
D.
N2O5
2022 JEE Mains MCQ
JEE Main 2022 (Online) 26th June Morning Shift

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

A.
Al < Ga < In < Tl
B.
Tl < In < Ga < Al
C.
Al < Ga < Tl < In
D.
Al < Tl < Ga < In
2022 JEE Mains MCQ
JEE Main 2022 (Online) 26th June Morning Shift

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

A.
H2S < H2Se < H2Te < H2O
B.
H2O < H2S < H2Se < H2Te
C.
H2S < H2Te < H2Se < H2O
D.
H2Se < H2S < H2Te < H2O
2022 JEE Mains MCQ
JEE Main 2022 (Online) 26th June Morning Shift

Consider the following reaction :

A + alkali $\to$ B (Major Product)

If B is an oxoacid of phosphorus with no P-H bond, then A is :

A.
White P4
B.
Red P4
C.
P2O3
D.
H3PO3
2022 JEE Mains MCQ
JEE Main 2022 (Online) 25th June Evening Shift

The number of bridged oxygen atoms present in compound B formed from the following reactions is

Pb(NO3)2 $\buildrel {673\,K} \over \longrightarrow $ A + PbO + O2

A $\buildrel {Dimerise} \over \longrightarrow $ B

A.
0
B.
1
C.
2
D.
3
2022 JEE Mains MCQ
JEE Main 2022 (Online) 25th June Morning Shift

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

A.
[Ag(NH3)4]Cl2
B.
[Ag(Cl)2(NH3)2]
C.
[Ag(NH3)2]Cl
D.
[Ag(NH3)Cl]Cl
2022 JEE Mains MCQ
JEE Main 2022 (Online) 24th June Evening Shift
PCl5 is well known, but NCl5 is not. because,
A.
nitrogen is less reactive than phosphorus.
B.
nitrogen doesn't have d-orbitals in its valence shell.
C.
catenation tendency is weaker in nitrogen than phosphorus.
D.
size of phosphorus is larger than nitrogen.
2022 JEE Mains MCQ
JEE Main 2022 (Online) 24th June Morning Shift

Identify the correct statement for B2H6 from those given below :

(A) In B2H6, all B-H bonds are equivalent.

(B) In B2H6, there are four 3-centre-2-electron bonds.

(C) B2H6 is a Lewis acid.

(D) B2H6 can be synthesized from both BF3 and NaBH4.

(E) B2H6 is a planar molecule.

Choose the most appropriate answer from the options given below :

A.
(A) and (E) only
B.
(B), (C) and (E) only
C.
(C) and (D) only
D.
(C) and (E) only
2022 JEE Mains MCQ
JEE Main 2022 (Online) 24th June Morning Shift

The most stable trihalide of nitrogen is :

A.
NF3
B.
NCl3
C.
NBr3
D.
NI3
2022 JEE Mains MCQ
JEE Main 2022 (Online) 24th June Morning Shift

Which one of the following elemental forms is not present in the enamel of the teeth?

A.
Ca2+
B.
P3+
C.
F$-$
D.
P5+
2021 JEE Mains MCQ
JEE Main 2021 (Online) 1st September Evening Shift
The oxide without nitrogen-nitrogen bond is :
A.
N2O
B.
N2O4
C.
N2O3
D.
N2O5
2021 JEE Mains MCQ
JEE Main 2021 (Online) 31st August Evening Shift
Which one of the following correctly represents the order of stability of oxides, X2O; (X = halogen)?
A.
Br > Cl > I
B.
Br > I > Cl
C.
Cl > I > Br
D.
I > Cl > Br
2021 JEE Mains MCQ
JEE Main 2021 (Online) 31st August Evening Shift
The number of S = O bonds present in sulphurous acid, peroxodisulphuric acid and pyrosulphuric acid, respectively are :
A.
2, 3 and 4
B.
1, 4 and 3
C.
2, 4 and 3
D.
1, 4 and 4
2021 JEE Mains MCQ
JEE Main 2021 (Online) 27th August Evening Shift
Which one of the following is formed (mainly) when red phosphorus is heated in a sealed tube at 803 K?
A.
White phosphorus
B.
Yellow phosphorus
C.
$\beta$-Black phosphorus
D.
$\alpha$-Black phosphorus
2021 JEE Mains MCQ
JEE Main 2021 (Online) 27th August Morning Shift
In which one of the following molecules strongest back donation of an electron pair from halide to boron is expected?
A.
BCl3
B.
BF3
C.
BBr3
D.
BI3
2021 JEE Mains MCQ
JEE Main 2021 (Online) 27th August Morning Shift
In polythionic acid, H2SxO6 (x = 3 to 5) the oxidation state(s) of sulphur is/are :
A.
+ 5 only
B.
+ 6 only
C.
+ 3 and + 5 only
D.
0 and + 5 only
2021 JEE Mains MCQ
JEE Main 2021 (Online) 26th August Evening Shift
The number of non-ionisable hydrogen atoms present in the final product obtained from the hydrolysis of PCl5 is :
A.
0
B.
2
C.
1
D.
3
2021 JEE Mains MCQ
JEE Main 2021 (Online) 26th August Evening Shift
Chalcogen group elements are :
A.
Se, Tb and Pu.
B.
Se, Te and Po.
C.
S, Te and Pm.
D.
O, Ti and Po.
2021 JEE Mains MCQ
JEE Main 2021 (Online) 26th August Morning Shift
The incorrect statement is :
A.
Cl2 is more reactive than ClF.
B.
F2 is more reactive than ClF.
C.
On hydrolysis ClF forms HOCl and HF.
D.
F2 is a stronger oxidizing agent than Cl2 in aqueous solution.
2021 JEE Mains MCQ
JEE Main 2021 (Online) 27th July Evening Shift
Given below are two statement : one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : SO2(g) is absorbed to a large extent than H2(g) on activated charcoal.

Reason R : SO2(g) has a higher critical temperature than H2(g).

In the light of the above statements, choose the most appropriate answer from the options given below.
A.
Both A and R are correct but R is not the correct explanation of A.
B.
Both A and R are correct and R is the correct explanation of A.
C.
A is not correct but R is correct.
D.
A is correct but R is not correct.
2021 JEE Mains MCQ
JEE Main 2021 (Online) 27th July Evening Shift
Match List - I with List - II :

List - I
(compound)		 List - II
(effect/affected species)
(a) Carbon monoxide (i) Carcinogenic
(b) Sulphur dioxide (ii) Metabolized by pyrus plants
(c) Polychlorinated biphenyls (iii) haemoglobin
(d) Oxides of Nitrogen (iv) Stiffness of flower buds


Choose the correct answer from the options given below :
A.
(a) - (iii), (b) - (iv), (c) - (i), (d) - (ii)
B.
(a) - (iv), (b) - (i), (c) - (iii), (d) - (ii)
C.
(a) - (i), (b) - (ii), (c) - (iii), (d) - (iv)
D.
(a) - (iii), (b) - (iv), (c) - (ii), (d) - (i)
2021 JEE Mains MCQ
JEE Main 2021 (Online) 27th July Evening Shift
Number of Cl = O bonds in chlorous acid, chloric acid and perchloric acid respectively are :
A.
3, 1 and 1
B.
4, 1 and 0
C.
1, 1 and 3
D.
1, 2 and 3
2021 JEE Mains MCQ
JEE Main 2021 (Online) 27th July Morning Shift
The product obtained from the electrolytic oxidation of acidified sulphate solutions, is :
A.
HSO$_4^ - $
B.
HO3SOOSO3H
C.
HO2SOSO2H
D.
HO3SOSO3H
2021 JEE Mains MCQ
JEE Main 2021 (Online) 25th July Morning Shift
Which one of the following compounds of Group-14 elements is not known?
A.
[GeCl6]2$-$
B.
[Sn(OH)6]2$-$
C.
[SiCl6]2$-$
D.
[SiF6]2$-$
2021 JEE Mains MCQ
JEE Main 2021 (Online) 22th July Evening Shift
Given below are the statements about diborane

(a) Diborane is prepared by the oxidation of NaBH4 with I2

(b) Each boron atom is in sp2 hybridized state

(c) Diborane has one bridged 3 centre-2-electron bond

(d) Diborane is a planar molecule

The option with correct statements is :
A.
(c) and (d) only
B.
(a) only
C.
(c) only
D.
(a) and (b) only
2021 JEE Mains MCQ
JEE Main 2021 (Online) 22th July Evening Shift
Which one of the following group-15 hydride is the strongest reducing agent?
A.
AsH3
B.
BiH3
C.
PH3
D.
SbH3
2021 JEE Mains MCQ
JEE Main 2021 (Online) 20th July Morning Shift
The species given below that does NOT show disproportionation reaction is :
A.
$BrO_4^ - $
B.
$Br{O^ - }$
C.
$BrO_2^ - $
D.
$BrO_3^ - $
2021 JEE Mains MCQ
JEE Main 2021 (Online) 20th July Morning Shift
Chemical nature of the nitrogen oxide compound obtained from a reaction of concentrated nitric acid and P4O10 (in 4 : 1 ratio) is :
A.
acidic
B.
basic
C.
amphoteric
D.
neutral
2021 JEE Mains MCQ
JEE Main 2021 (Online) 18th March Morning Shift
Match List - I with List - II

List - I
(process)		 List - II
(catalyst)
(a) Deacron's process (i) ZSM-5
(b) Contact process (ii) $CuC{l_2}$
(c) Cracking of hydrocarbons (iii) Particles 'Ni'
(d) Hydrogenation of vegetable oils (iv) ${V_2}{O_5}$


Choose the most appropriate answer from the options given below :
A.
(a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
B.
(a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
C.
(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
D.
(a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)
2021 JEE Mains MCQ
JEE Main 2021 (Online) 18th March Morning Shift
The number of ionisable hydrogens present in the product obtained from a reaction of phosphorus trichloride and phosphonic acid is :
A.
3
B.
0
C.
2
D.
1
2021 JEE Mains MCQ
JEE Main 2021 (Online) 17th March Evening Shift
The set that represents the pair of neutral oxides of nitrogen is :
A.
NO and N2O
B.
N2O and NO2
C.
NO and NO2
D.
N2O and N2O3
2021 JEE Mains MCQ
JEE Main 2021 (Online) 16th March Evening Shift
The INCORRECT statement regarding the structure of C60 is :
A.
The five-membered rings are fused only to six-membered rings.
B.
It contains 12 six-membered rings and 24 five-membered rings.
C.
Each carbon atom forms three sigma bonds.
D.
The six-membered rings are fused to both six and five-membered rings.
2021 JEE Mains MCQ
JEE Main 2021 (Online) 16th March Morning Shift
Match List - I with List - II :

List - I
Industrial process		 List - II
Application
(a) Haber's process (i) $HN{O_3}$ synthesis
(b) Ostwald's process (ii) Aluminium extraction
(c) Contact process (iii) $N{H_3}$ synthesis
(d) Hal-Heroult process (iv) ${H_2}S{O_4}$ synthesis


Choose the correct answer from the options given below :
A.
(a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
B.
(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
C.
(a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
D.
(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
2021 JEE Mains MCQ
JEE Main 2021 (Online) 16th March Morning Shift
A group of 15 element, which is a metal and forms a hydride with strongest reducing power among group 15 hydrides. The element is :
A.
As
B.
Sb
C.
Bi
D.
P
2021 JEE Mains MCQ
JEE Main 2021 (Online) 16th March Morning Shift
Match List - I with List - II :

List - I
Name of oxo acid		 List - II
Oxidation state of 'P'
(a) Hypophosphorous acid (i) +5
(b) Orthophosphoric acid (ii) +4
(c) Hypophosphoric acid (iii) +3
(d) Orthophosphorous acid (iv) +2
(v) +1


Choose the correct answer from the options given below :
A.
(a) - (iv), (b) - (v), (c) - (ii), (d) - (iii)
B.
(a) - (iv), (b) - (i), (c) - (ii), (d) - (iii)
C.
(a) - (v), (b) - (i), (c) - (ii), (d) - (iii)
D.
(a) - (v), (b) - (iv), (c) - (ii), (d) - (iii)
2021 JEE Mains MCQ
JEE Main 2021 (Online) 26th February Evening Shift
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 :
A.
A is correct but R is not correct
B.
A is not correct but R is correct
C.
Both A and R are correct but R is NOT the correct explanation of A
D.
Both A and R are correct and R is the correct explanation of A
2021 JEE Mains MCQ
JEE Main 2021 (Online) 26th February Morning Shift
Find A, B and C in the following reactions :

$N{H_3} + A + C{O_2} \to {(N{H_4})_2}C{O_3}$

${(N{H_4})_2}C{O_3} + {H_2}O + B \to N{H_4}HC{O_3}$

$N{H_4}HC{O_3} + NaCl \to N{H_4}Cl + C$
A.
$A - {O_2};B - C{O_2};C - N{a_2}C{O_3}$
B.
$A - {H_2}O;B - {O_2};C - NaHC{O_3}$
C.
$A - {H_2}O;B - {O_2};C - N{a_2}C{O_3}$
D.
$A - {H_2}O;B - C{O_2};C - NaHC{O_3}$
2021 JEE Mains MCQ
JEE Main 2021 (Online) 26th February Morning Shift
On treating a compound with warm dil. H2SO4, gas X is evolved which turns K2Cr2O7 paper acidified with dil. H2SO4 to a green compound Y. X and Y respectively are :
A.
X = SO2, Y = Cr2O3
B.
X = SO3, Y = Cr2(SO4)3
C.
X = SO3, Y = Cr2O3
D.
X = SO2, Y = Cr2(SO4)3
2021 JEE Mains MCQ
JEE Main 2021 (Online) 25th February Evening Shift
Given below are two statements :

Statement I : $\alpha$ and $\beta$ forms of sulphur can change reversibly between themselves with slow heating or slow cooling.

Statement II : At room temperature the stable crystalline form of sulphur is monoclinic sulphur.

In the light of the above statements, choose the correct answer from the options given below :
A.
Statement I is true but Statement II is false.
B.
Statement I is false but Statement II is true.
C.
Both Statement I and Statement II are true.
D.
Both Statement I and Statement II are false.
2021 JEE Mains MCQ
JEE Main 2021 (Online) 25th February Morning Shift
The correct statement about B2H6 is :
A.
Its fragment, BH3, behaves as a Lewis base.
B.
All B$-$H$-$B angles are of 120$^\circ$.
C.
The two B$-$H$-$B bonds are not of same length.
D.
Terminal B$-$H bonds have less p-character when compared to bridging bonds.
2021 JEE Mains MCQ
JEE Main 2021 (Online) 24th February Morning Shift
Al2O3 was leached with alkali to get X. The solution of X on passing of gas Y, forms Z. X, Y and Z respectively are :
A.
X = Na[Al(OH)4], Y = CO2, Z = Al2O3.xH2O
B.
X = Al(OH)3, Y = CO2, Z = Al2O3
C.
X = Al(OH)3, Y = SO2, Z = Al2O3.xH2O
D.
X = Na[Al(OH)4], Y = SO2, Z = Al2O3
2020 JEE Mains MCQ
JEE Main 2020 (Online) 6th September Evening Slot
The reaction of NO with N2O4 at 250 K gives :
A.
N2O3
B.
N2O5
C.
N2O
D.
NO2
2020 JEE Mains MCQ
JEE Main 2020 (Online) 6th September Evening Slot
Reaction of an inorganic sulphite X with dilute H2SO4 generates compound Y. Reaction of Y with NaOH gives X. Further, the reaction of X with Y and water affords compound Z. Y and Z, respectively, are :
A.
S and Na2SO3
B.
SO2 and NaHSO3
C.
SO2 and Na2SO3
D.
SO3 and NaHSO3