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p-Block Elements

340 Questions
All Exams JEE Mains JEE Advanced
2020 JEE Mains MCQ
JEE Main 2020 (Online) 6th September Morning Slot
The correct statement with respect to dinitrogen is :
A.
N2 is paramagnetic in nature
B.
it can be used as an inert diluent for reactive chemicals
C.
it can combine with dioxygen at 25oC
D.
liquid dinitrogen is not used in cryosurgery
2020 JEE Mains MCQ
JEE Main 2020 (Online) 5th September Evening Slot
Boron and silicon of very high purity can be obtained through :
A.
Liquation
B.
Electrolytic refining
C.
Zone refining
D.
Vapour phase refining
2020 JEE Mains MCQ
JEE Main 2020 (Online) 5th September Evening Slot
Reaction of ammonia with excess Cl2 gives :
A.
NH4Cl and N2
B.
NH4Cl and HCl
C.
NCl3 and HCl
D.
NCl3 and NH4Cl
2020 JEE Mains MCQ
JEE Main 2020 (Online) 4th September Morning Slot
On heating, lead (II) nitrate gives a brown gas (A). The gas (A) on cooling changes to a colourless solid/liquid (B). (B) on heating with NO changes to a blue solid (C). The oxidation number of nitrogen in solid (C) is :
A.
+3
B.
+4
C.
+5
D.
+2
2020 JEE Mains MCQ
JEE Main 2020 (Online) 3rd September Morning Slot
Aqua regia is used for dissolving noble metals (Au, Pt, etc.). The gas evolved in this process is :
A.
N2O3
B.
N2
C.
N2O5
D.
NO
2020 JEE Mains MCQ
JEE Main 2020 (Online) 3rd September Morning Slot
In a molecule of pyrophosphoric acid, the number of P - OH, P = O and P - O - P bonds/moiety(ies) respectively are :
A.
4, 2 and 0
B.
4, 2 and 1
C.
3, 3 and 3
D.
2, 4 and 1
2020 JEE Mains MCQ
JEE Main 2020 (Online) 2nd September Morning Slot
On heating compound (A) gives a gas (B) which is a constituent of air. This gas when treated with H2 in the presence of a catalyst gives another gas (C) which is basic in nature. (A) should not be :
A.
Pb(NO3)2
B.
(NH4)2Cr2O7
C.
NH4NO2
D.
NaN3
2020 JEE Mains MCQ
JEE Main 2020 (Online) 9th January Evening Slot
The reaction of H3N3B3Cl3 (A) with LiBH4 in tetrahydrofuran gives inorganic benzene (B). Further, the reaction of (A) with (C) leads to H3N3B3(Me)3. Compounds (B) and (C) respectively, are :
A.
Borazine and MeBr
B.
Diborane and MeMgBr
C.
Boron nitride and MeBr
D.
Borazine and MeMgBr
2020 JEE Mains MCQ
JEE Main 2020 (Online) 9th January Morning Slot
'X' melts at low temperature and is a bad conductor of electricity in both liquid and solid state. X is :
A.
Mercury
B.
Carbon tetrachloride
C.
Zinc sulphide
D.
Silicon carbide
2020 JEE Mains MCQ
JEE Main 2020 (Online) 8th January Evening Slot
A metal (A) on heating in nitrogen gas gives compound B. B on treatment with H2O gives a colourless gas which when passed through CuSO4 solution gives a dark blue-violet coloured solution. A and B respectively, are :
A.
Na and NaNO3
B.
Na and Na3N
C.
Mg and Mg3N2
D.
Mg and Mg(NO3)2
2020 JEE Mains MCQ
JEE Main 2020 (Online) 8th January Evening Slot
White Phosphorus on reaction with concentrated NaOH solution in an inert atmosphere of CO2 gives phosphine and compound (X). (X) on acidification with HCl gives compound (Y). The basicity of compound (Y) is :
A.
2
B.
4
C.
1
D.
3
2020 JEE Mains MCQ
JEE Main 2020 (Online) 8th January Morning Slot
The number of bonds between sulphur and oxygen atoms in S2O82- and the number of bonds between sulphur and sulphur atoms in rhombic sulphur, respectively, are :
A.
4 and 8
B.
8 and 6
C.
4 and 6
D.
8 and 8
2020 JEE Mains MCQ
JEE Main 2020 (Online) 7th January Evening Slot
In the following reaction, products (A) and (B) respectively, are :

NaOH + Cl2 $ \to $ (A) + side products
(hot and conc.)

Ca(OH)2 + Cl2 $ \to $ (B) + side products (dry)
A.
NaOCl and Ca(OCl)2
B.
NaClO3 and Ca(ClO3)2
C.
NaOCl and Ca(ClO3)2
D.
NaClO3 and Ca(OCl)2
2019 JEE Mains MCQ
JEE Main 2019 (Online) 12th April Evening Slot
The C–C bond length is maximum in :
A.
C60
B.
diamond
C.
graphite
D.
C70
2019 JEE Mains MCQ
JEE Main 2019 (Online) 12th April Morning Slot
The basic structural unit of feldspar, zeolites, mica, and asbestos is :
A.
JEE Main 2019 (Online) 12th April Morning Slot Chemistry - p-Block Elements Question 185 English Option 1
B.
(SiO4)4–
C.
(SiO3)2–
D.
SiO2
2019 JEE Mains MCQ
JEE Main 2019 (Online) 10th April Evening Slot
The noble gas that does not occur in the atmosphere is :
A.
Ne
B.
He
C.
Kr
D.
Ra
2019 JEE Mains MCQ
JEE Main 2019 (Online) 10th April Evening Slot
The number of pentagons in C60 and trigons (triangles) in white phosphorus, respectively, are :
A.
12 and 3
B.
20 and 3
C.
20 and 4
D.
12 and 4
2019 JEE Mains MCQ
JEE Main 2019 (Online) 10th April Morning Slot
The correct order of catenation is :
A.
C > Sn > Si $ \approx $ Ge
B.
Si > Sn > C > Ge
C.
C > Si > Ge $ \approx $ Sn
D.
Ge > Sn > Si > C
2019 JEE Mains MCQ
JEE Main 2019 (Online) 9th April Evening Slot
The correct statements among I to III regarding group 13 element oxides are,
(I) Boron trioxide is acidic.
(II) Oxides of aluminium and gallium are amphoteric.
(III) Oxides of indium and thalliumare basic.
A.
(II) and (III) only
B.
(I), (II) and (III)
C.
(I) and (III) only
D.
(I) and (II) only
2019 JEE Mains MCQ
JEE Main 2019 (Online) 9th April Evening Slot
The amorphous form of silica is :
A.
kieselguhr
B.
quartz
C.
tridymite
D.
cristobalite
2019 JEE Mains MCQ
JEE Main 2019 (Online) 9th April Morning Slot
C60 an allotrope of carbon contains :
A.
12 hexagons and 20 pentagons.
B.
20 hexagons and 12 pentagons.
C.
16 hexagons and 16 pentagons
D.
18 hexagons and 14 pentagons.
2019 JEE Mains MCQ
JEE Main 2019 (Online) 8th April Morning Slot
Diborane (B2H6) reacts with O2 and H2O independently, then products formed are :
A.
B2O3 and HBO2
B.
B2O3 and H3BO3
C.
HBO2 and H3BO3
D.
HBO2 and HBO3
2019 JEE Mains MCQ
JEE Main 2019 (Online) 12th January Evening Slot
The element that does NOT show catenation is :
A.
Ge
B.
Si
C.
Sn
D.
Pb
2019 JEE Mains MCQ
JEE Main 2019 (Online) 12th January Evening Slot
The element that shows greater ability to form p$\pi $-p$\pi $ multiple bonds, is :
A.
Si
B.
Ge
C.
C
D.
Sn
2019 JEE Mains MCQ
JEE Main 2019 (Online) 12th January Evening Slot
Chlorine on reaction with hot and concentrated sodium hydroxide give :
A.
C$\ell $O$_3^ - $ and C$\ell $O$_2^ - $
B.
C$\ell $$-$ and C$\ell $O$-$
C.
C$\ell $$-$ and C$\ell $O$_2^ - $
D.
C$\ell $$-$ and C$\ell $O$_3^ - $
2019 JEE Mains MCQ
JEE Main 2019 (Online) 12th January Morning Slot
Iodine reacts with concentrated HNO3 to yield Y along with other products. The oxidation state of iodine in Y, is :
A.
3
B.
1
C.
7
D.
5
2019 JEE Mains MCQ
JEE Main 2019 (Online) 11th January Evening Slot
The hydride that is NOT electron deficient :
A.
B2H6
B.
AlH3
C.
GaH3
D.
SiH4
2019 JEE Mains MCQ
JEE Main 2019 (Online) 11th January Evening Slot
The relative stability of +1 oxidation state of group 13 elements follows the order :
A.
Tl < In < Ga < Al
B.
Al < Ga < TI < In
C.
AI < Ga < In < TI
D.
Ga < AI < In < TI
2019 JEE Mains MCQ
JEE Main 2019 (Online) 11th January Morning Slot
The chloride that CANNOT get hydrolysed is :
A.
SnCl4
B.
SiCl4
C.
PbCl4
D.
CCl4
2019 JEE Mains MCQ
JEE Main 2019 (Online) 10th January Evening Slot
Among the following reactions of hydrogen with halogens, the one that requires a catalyst is :
A.
H2 + Br2 $ \to $ 2HBr
B.
H2 + Cl2 $ \to $ 2HCl
C.
H2 + F2 $ \to $ 2HF
D.
H2 + I2 $ \to $ 2HI
2019 JEE Mains MCQ
JEE Main 2019 (Online) 10th January Evening Slot
The number of 2-centre-2-electron and 3-centre -2-electron bonds in B2H6, respectively, are :
A.
2 and 2
B.
2 and 1
C.
2 and 4
D.
4 and 2
2019 JEE Mains MCQ
JEE Main 2019 (Online) 9th January Evening Slot
Good reducing nature of H3PO2 is attributed to the presence of :
A.
Two P $-$ OH bonds
B.
One P $-$ H bond
C.
Two P $-$ H bonds
D.
One P $-$ OH bond
2019 JEE Mains MCQ
JEE Main 2019 (Online) 9th January Morning Slot
Correct statements among a to d regarding silicones are :

(a)   They are polymers with hydrophobic character.
(b)   They are biocompatible.
(c)   In general, they have high thermal stability and low dielectric strength.
(d)   Usually, they are resistant to oxidation and used as greases.
A.
(a), (b), (c) and (d)
B.
(a), (b) and (c) only
C.
(a) and (b) only
D.
(a), (b) and (d) only
2019 JEE Mains MCQ
JEE Main 2019 (Online) 9th January Morning Slot
The one that is extensively used as a piezoelectric material is :
A.
tridymite
B.
amorphous silica
C.
quartz
D.
mica
2018 JEE Mains MCQ
JEE Main 2018 (Online) 16th April Morning Slot
A group 13 element 'X' reacts with chlorine gas to produce a compound XCl3. XCl3 is electron deficient and easily reacts with NH3 to form Cl3X $ \leftarrow $ NH3 adduct ; however, XCl3 does not dimerize X is :
A.
B
B.
Al
C.
Ga
D.
In
2018 JEE Mains MCQ
JEE Main 2018 (Online) 16th April Morning Slot
Among the oxides of nitrogen : N2O3, N2O4 and N2O5; the molecule(s) having nitrogen-nitrogen bond is / are :
A.
Only N2O5
B.
N2O3 and N2O5
C.
N2O4 and N2O5
D.
N2O3 and N2O4
2018 JEE Mains MCQ
JEE Main 2018 (Offline)
The compound that does not produce nitrogen gas by the thermal decomposition is :
A.
(NH4)2SO4
B.
Ba(N3)2
C.
(NH4)2Cr2O7
D.
NH4NO2
2018 JEE Mains MCQ
JEE Main 2018 (Offline)
When metal ‘M’ is treated with NaOH, a white gelatinous precipitate ‘X’ is obtained, which is soluble in excess of NaOH. Compound ‘X’ when heated strongly gives an oxide which is used in chromatography as an adsorbent. The metal ‘M’ is
A.
Fe
B.
Zn
C.
Ca
D.
Al
2018 JEE Mains MCQ
JEE Main 2018 (Online) 15th April Evening Slot
The number of P $-$ O bonds in P4O6 is :
A.
6
B.
9
C.
12
D.
18
2018 JEE Mains MCQ
JEE Main 2018 (Online) 15th April Evening Slot
Lithium aluminium hydride reacts with silicon tetrachloride to form :
A.
LiCl,   AlH3  and   SiH4
B.
LiCl,  AlCl3  and  SiH4
C.
LiH,   AlCl3  and  SiCl2
D.
LiH,  AlH3   and   SiH4
2018 JEE Mains MCQ
JEE Main 2018 (Online) 15th April Evening Slot
In XeO3F2, the number of bond pair(s), $\pi $-bond(s) and lone pair(s) on Xe atom respectively are :
A.
5, 2, 0
B.
4, 2, 2
C.
5, 3, 0
D.
4, 4, 0
2018 JEE Mains MCQ
JEE Main 2018 (Online) 15th April Evening Slot
In KO2, the nature of oxygen species and the oxydation state of oxygen atom are, respectively :
A.
Oxide and $-$ 2
B.
Superoxide and $-$ 1/2
C.
Peroxide and $-$ 1/2
D.
Superoxide and $-$ 1
2018 JEE Mains MCQ
JEE Main 2018 (Online) 15th April Morning Slot
A white sodium salt dissolves readily in water to give a solution which is neutral to litmus. When silver nitrate solution is added to the aformentioned solution, a white precipitate is obtained which does not dissolve in dil. nitric acid. The anion is :
A.
CO32-
B.
SO42-
C.
Cl-
D.
S2-
2018 JEE Mains MCQ
JEE Main 2018 (Online) 15th April Morning Slot
Xenon hexafluoride on partial hydrolysis produces compounds 'X' and 'Y' . Compounds 'X' and 'Y' and the oxidation state of Xe are respectively :
A.
XeO2(+4) and XeO3(+6)
B.
XeOF4(+6) and XeO3(+6)
C.
XeO2F2(+6) and XeO2(+4)
D.
XeOF4(+6) and XeO2F2(+6)
2018 JEE Mains MCQ
JEE Main 2018 (Online) 15th April Morning Slot
In graphite and diamond, the percentage of p-characters of the hybrid orbitals in hybridisation are respectively :
A.
33 and 25
B.
33 and 75
C.
50 and 75
D.
67 and 75
2017 JEE Mains MCQ
JEE Main 2017 (Online) 9th April Morning Slot
XeF6 on partial hydrolysis with water produces a compound ‘X’. The same compound ‘X’ is formed when XeF6 reacts with silica. The compound ‘X’ is :
A.
XeF2
B.
XeF4
C.
XeOF4
D.
XeO3
2017 JEE Mains MCQ
JEE Main 2017 (Online) 9th April Morning Slot
The correct sequence of decreasing number of $\pi $-bonds in the structures of H2SO3, H2SO4 and H2S2O7 is :
A.
H2SO3 > H2SO4 > H2S2O7
B.
H2SO4 > H2S2O7 > H2SO3
C.
H2S2O7 > H2SO4 > H2SO3
D.
H2S2O7 > H2SO3 > H2SO4
2017 JEE Mains MCQ
JEE Main 2017 (Online) 9th April Morning Slot
The number of P−OH bonds and the oxidation state of phosphorus atom in pyrophosphoric acid (H4P2O7) respectively are :
A.
four and four
B.
five and four
C.
five and five
D.
four and five
2017 JEE Mains MCQ
JEE Main 2017 (Online) 8th April Morning Slot
A metal ‘M’ reacts with nitrogen gas to afford ‘M3N’. ‘M3N’ on heating at high temperature gives back ‘M’ and on reaction with water produces a gas ‘B’. Gas ‘B’ reacts with aqueous solution of CuSO4 to form a deep blue compound. ‘M’ and ‘B’ respectively are :
A.
Li and NH3
B.
Ba and N2
C.
Na and NH3
D.
Al and N2
2017 JEE Mains MCQ
JEE Main 2017 (Online) 8th April Morning Slot
The number of S = O and S − OH bonds present in peroxodisulphuric acid and pyrosulphuric acid respectively are :
A.
(2 and 2) and (2 and 2)
B.
(2 and 4) and (2 and 4)
C.
(4 and 2) and (2 and 4)
D.
(4 and 2) and (4 and 2)