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p-Block Elements

102 Questions Start NEET Test
All Exams NEET AIIMS
2016 Q51 NEET MCQ
10 Mar 2026
Among the following the correct order of acidity is
A.
HClO2 < HClO < HClO3 < HClO4
B.
HClO4 < HClO2 < HClO < HClO3
C.
HClO3 < HClO4 < HClO2 < HClO
D.
HClO < HClO2 < HClO3 < HClO4
2016 Q52 NEET MCQ
10 Mar 2026
Match the compounds given in column I with the hybridisation and shape given in column II and mark the correct option

Column ${\rm I}$ Column ${\rm I}$${\rm I}$
(A) XeF6 (i) distorted octahedral
(B) XeO3 (ii) square planar
(C) XeOF4 (iii) pyramidal
(D) XeF4 (iv) square pyramidal
A.
(A) $ \to $ (iv);  (B) $ \to $ (iii);  (C) $ \to $ (i);  (D) $ \to $ (ii)
B.
(A) $ \to $ (iv);  (B) $ \to $ (i);  (C) $ \to $ (ii);  (D) $ \to $ (iii)
C.
(A) $ \to $ (i);  (B) $ \to $ (iii);  (C) $ \to $ (iv);  (D) $ \to $ (ii)
D.
(A) $ \to $ (i);  (B) $ \to $ (ii);  (C) $ \to $ (iv);  (D) $ \to $ (iii)
2016 Q53 NEET MCQ
10 Mar 2026
When copper is heated with conc. HNO3 it produces
A.
Cu(NO3)2, NO and NO2
B.
Cu(NO3)2 and N2O
C.
Cu(NO3)2 and NO2
D.
Cu(NO3)2 and NO
2016 Q54 NEET MCQ
10 Mar 2026
Which is the correct statement for the given acids?
A.
Phosphinic acid is a monoprotic acid while phosphonic acid is a diprotic acid.
B.
Phosphinic acid is a diprotic acid while phosphonic acid is a monoprotic acid.
C.
Both are diprotic acids.
D.
Both are triprotic acids.
2016 Q55 NEET MCQ
10 Mar 2026
Which one of the following orders is correct for the bond dissociation enthalpy of halogen molecules?
A.
Br2 > I2 > F2 > Cl2
B.
F2 > Cl2 > Br2 > I2
C.
I2 > Br2 > Cl2 > F2
D.
Cl2 > Br2 > F2 > I2
2015 Q56 NEET MCQ
10 Mar 2026
Which of the statements given below is incorrect?
A.
O3 molecule is bent.
B.
ONF is isoelectronic with O2N
C.
OF2 is an oxides of fluorine.
D.
Cl2O7 is an anhydride of perchloric acid.
2015 Q57 NEET MCQ
10 Mar 2026
Strong reducing behavior of H3PO2 is due to
A.
high electron gain enthalpy of phosphorus
B.
high oxidation state of phosphorus
C.
presence of two $-$OH groups and one P$-$H bond
D.
presence of one $-$OH group and two P$-$H bonds.
2015 Q58 NEET MCQ
10 Mar 2026
The stability of +1 oxidation state among Al, Ga, In and Tl increases in the sequence
A.
Al < Ga < In < Tl
B.
Tl < In < Ga < Al
C.
In < Tl < Ga < Al
D.
Ga < In < Al < Tl
2015 Q59 NEET MCQ
10 Mar 2026
The formation of the oxide ion, O2$-$(g) from oxygen atom requires first an exthermic and then an endothermic step as shown below:
O(g) + e$-$ $ \to $ O$-$(g);  $\Delta $fHo = $-$141 kJ mol$-$1

O$-$(g) + e$-$ $ \to $ O2$-$(g);  $\Delta $fHo = +780 kJ mol$-$1

Thus, process of formation of O2$-$ is isoelectronic with neon. It is due to the fact that,
A.
O$-$ ion has comparatively smaller size than oxygen atom
B.
oxygen is more electronegative
C.
addition of electron in oxygen results in larger size of the ion
D.
electron repulsion outweighs the stability gained by achieving noble gas configuration.
2015 Q60 NEET MCQ
10 Mar 2026
The variation of the boiling points of the hydrogen halides is in the order HF > HI > HBr > HCl.

What explains the higher boiling point of hydrogen fluoride?
A.
There is strong hydrogen bonding between HF molecules.
B.
The bond energy of HF molecules is greater than in other hydrogen halides.
C.
The effect of nuclear shielding is much reduced in fluorine which polarises the HF molecule.
D.
The electronegativity of fluorine is much higher than for other elements in the group.
2015 Q61 NEET MCQ
10 Mar 2026
Nitrogen dioxide and sulphur dioxide have some properties in common . Which property is shown by one of these compounds , but not by the other?
A.
Is soluble in water.
B.
Is used as a food preservative.
C.
Forms 'acid-rain'.
D.
Is a reducing agent.
2014 Q62 NEET MCQ
10 Mar 2026
Acidity of diprotic acids in aqueous solutions increases in the order
A.
H2S < H2Se < H2Te
B.
H2Se < H2S < H2Te
C.
H2Te < H2S < H2Se
D.
H2Se < H2Te < H2S
2013 Q63 NEET MCQ
10 Mar 2026
Identify the incorrect statement, regarding the molecule XeO4 :
A.
XeO4 molecule is square planar.
B.
There are four p$\pi $ - d$\pi $ bonds.
C.
There are four sp3 - p, $\sigma $ bonds.
D.
XeO4 molecule is tetrahedral.
2013 Q64 NEET MCQ
10 Mar 2026
Which statement is wrong?
A.
Beryl is an example of cyclic silicate.
B.
Mg2SiO4 is orthosilicate.
C.
Basic structural unit in silicates is the SiO4 tetrahedron.
D.
Feldspars are not aluminosilicates.
2013 Q65 NEET MCQ
10 Mar 2026
The basic structural unit of silicates is
A.
SiO32$-$
B.
SiO$_4^{2 - }$
C.
SiO$-$
D.
SiO$_4^{4 - }$
2013 Q66 NEET MCQ
10 Mar 2026
Which of the following does not give oxygen on heating?
A.
K2Cr2O7
B.
(NH4)2Cr2O7
C.
KClO3
D.
Zn(ClO3)2
2013 Q67 NEET MCQ
10 Mar 2026
Which of these is not a monomer for a high molecular mass silicone polymer?
A.
Me3SiCl
B.
PhSiCl3
C.
MeSiCl3
D.
Me2SiCl2
2013 Q68 NEET MCQ
10 Mar 2026
Which of the following structure is similar to graphite?
A.
B4C
B.
B2H6
C.
BN
D.
B
2013 Q69 NEET MCQ
10 Mar 2026
Which one of the following molecules contains no $\pi $ bond?
A.
SO2
B.
NO2
C.
CO2
D.
H2O
2013 Q70 NEET MCQ
10 Mar 2026
Which is the strongest acid in the following?
A.
HClO4
B.
H2SO3
C.
H2SO4
D.
HClO3
2012 Q71 NEET MCQ
10 Mar 2026
In which of the following arrangements the given sequence is not strictly according to the property indicated against it?
A.
HF < HCl < HBr < HI : increasing acidic strength
B.
H2O < H2S < H2Se < H2Te : increasing pKa values
C.
NH3 < PH3 < AsH3 < SbH3 : increasing acidic character
D.
CO2 < SiO2 < SnO2 < PbO2 : increasing oxidising power
2012 Q72 NEET MCQ
10 Mar 2026
Which of the following statements is not valid for oxoacids of phosphorus?
A.
Orthophosphoric acid is used in the manufacture of triple superphosphate.
B.
Hypophosphorous acid is a diprotic acid.
C.
All oxoacids contain tetrahedral four coordinated phosphorus.
D.
All oxoacids contain atleast one P$=$O unit and one P$-$OH group.
2012 Q73 NEET MCQ
10 Mar 2026
Sulphur trioxide can be obtained by which of the following reaction?
A.
CaSO4 + C $\buildrel \Delta \over \longrightarrow $
B.
Fe2(SO4)3 $\buildrel \Delta \over \longrightarrow $
C.
S + H2SO4 $\buildrel \Delta \over \longrightarrow $
D.
H2SO4 + PCl5 $\buildrel \Delta \over \longrightarrow $
2012 Q74 NEET MCQ
10 Mar 2026
In which of the following compounds, nitrogen exhibits highest oxidation state?
A.
N2H4
B.
NH3
C.
N3H
D.
NH2OH
2011 Q75 NEET MCQ
10 Mar 2026
Which of the following oxide is amphoteric?
A.
SnO2
B.
CaO
C.
SiO2
D.
CO2
2011 Q76 NEET MCQ
10 Mar 2026
Which of the following statements is incorrect?
A.
Pure sodium metal dissolves in liquid ammonia to give blue solution.
B.
NaOH reacts with glass to give sodium silicate.
C.
Aluminium reacts with excess NaOH to give Al(OH)3.
D.
NaHCO3 on heating gives Na2CO3.
2011 Q77 NEET MCQ
10 Mar 2026
Name the two type of the structure of silicate in which one oxygen atom of [SiO4]4$-$ is shared?
A.
Linear chain silicate
B.
Sheet silicate
C.
Pyrosilicate
D.
Three dimensional
2011 Q78 NEET MCQ
10 Mar 2026
The Lassaigne's extract is boiled with conc. HNO3 while testing for halogens. By doing so it
A.
decomposes Na2S and NaCN, formed
B.
helps in the precipitation of AgCl
C.
increases the solubility product of AgCl
D.
increases the concentration of N$_3^ - $ ions
2010 Q79 NEET MCQ
10 Mar 2026
How many bridging oxygen atoms are present in P4O10?
A.
6
B.
4
C.
2
D.
5
2010 Q80 NEET MCQ
10 Mar 2026
The tendency of BF3, BCl3 and BBr3 to behave as Lewis acid decreases in the sequence
A.
BCl3 > BF3 > BBr3
B.
BBr3 > BCl3 > BF3
C.
BBr3 > BF3 > BCl3
D.
BF3 > BCl3 > BBr3
2010 Q81 NEET MCQ
10 Mar 2026
The correct order of increasing bond angles in the following species is
A.
Cl2O < ClO2 < ClO$_2^ - $
B.
ClO2 < Cl2O < ClO$_2^ - $
C.
Cl2O < ClO$_2^ - $ < ClO2
D.
ClO$_2^ - $ < Cl2O < ClO2
2010 Q82 NEET MCQ
10 Mar 2026
Oxidation states of P in H4P2O5, H4P2O6, H4P2O7 are respectively
A.
+3, +5, +4
B.
+5, +3, +4
C.
+5, +4, +3
D.
+3, +4, +5
2010 Q83 NEET MCQ
10 Mar 2026
Which one of the following molecular hydrides acts as a Lewis acid?
A.
NH3
B.
H2O
C.
B2H6
D.
CH4
2009 Q84 NEET MCQ
10 Mar 2026
The straight chain polymer is formed by
A.
hydrolysis of CH3SiCl3 followed by condensation polymerisation
B.
hydrolysis of (CH3)4Si by addition polymerisation
C.
hydrolysis of (CH3)2SiCl2 followed by condensation polymerisation
D.
hydrolysis of (CH3)3SiCl followed by condensation polymerisation.
2009 Q85 NEET MCQ
10 Mar 2026
Among the following which is the strongest oxidising agent?
A.
Br2
B.
I2
C.
Cl2
D.
F2
2009 Q86 NEET MCQ
10 Mar 2026
The stability of +1 oxidation state among Al, Ga, In and Tl increases in the sequence
A.
Al < Ga < In < Tl
B.
Tl < In < Ga < Al
C.
In < Tl < Ga < Al
D.
Ga < In < Al < Tl
2008 Q87 NEET MCQ
10 Mar 2026
The angular shape of ozone molecule (O3) consists of
A.
1$\sigma $ and 1$\pi $ bond
B.
2$\sigma $ and 1$\pi $ bond
C.
1$\sigma $ and 2$\pi $ bonds
D.
2$\sigma $ and 2$\pi $ bonds
2007 Q88 NEET MCQ
10 Mar 2026
Which of the following anions is present in the chain structure of silicates?
A.
(Si2O$_5^{2 - }$)n
B.
(SiO$_3^{2 - }$)n
C.
SiO$_4^{4 - }$
D.
Si2O$_7^{6 - }$
2007 Q89 NEET MCQ
10 Mar 2026
Which one of the following orders correctly represents the increasing acid strengths of the given acids?
A.
HOClO < HOCl < HOClO3 < HOClO2
B.
HOClO2 < HOClO3 < HOClO < HOCl
C.
HOClO3 < HOClO2 < HOClO < HOCl
D.
HOCl < HOClO < HOClO2 < HOClO3
2007 Q90 NEET MCQ
10 Mar 2026
Which of the following oxidation states are the most characteristic for lead and tin respectively?
A.
+2, +4
B.
+4, +4
C.
+2, +2
D.
+4, +2
2006 Q91 NEET MCQ
10 Mar 2026
The correct order regarding the electronegativity of hybrid orbitals of carbon is
A.
sp < sp2 < sp3
B.
sp > sp2 < sp3
C.
sp > sp2 > sp3
D.
sp < sp2 > sp3
2006 Q92 NEET MCQ
10 Mar 2026
In which of the following molecules are all the bonds are not equal?
A.
NF3
B.
ClF3
C.
BF3
D.
AlF3
2006 Q93 NEET MCQ
10 Mar 2026
Which of the following is the most basic oxide?
A.
SeO2
B.
Al2O3
C.
Sb2O3
D.
Bi2O3
2005 Q94 NEET MCQ
10 Mar 2026
Which one of the following orders correctly represents the increasing acid strengths of the given acids?
A.
HOClO < HOCl < HOClO3 < HOClO2
B.
HOClO3 < HOClO2 < HOClO < HOCl
C.
HOClO2 < HOClO3 < HOClO < HOCl
D.
HOCl < HOClO < HOClO2 < HOClO3
2005 Q95 NEET MCQ
10 Mar 2026
Which one of the following oxides is expected to exhibit paramagnetic behaviour?
A.
CO2
B.
SiO2
C.
SO2
D.
ClO2
2005 Q96 NEET MCQ
10 Mar 2026
What is the correct relationship between the pH of isomolar solutions of sodium oxide, Na2O (pH1), sodium sulphide, Na2S (pH2), sodium srlenide, Na2Se (pH3) and sodium telluride Na2Te (pH4)?
A.
pH1 > pH2 > pH3 > pH4
B.
pH1 > pH2 $ \approx $ pH3 > pH4
C.
pH1 < pH2 < pH3 < pH4
D.
pH1 < pH2 < pH3 $ \approx $ pH4
2004 Q97 NEET MCQ
10 Mar 2026
Which one of the following statements about the zeolite is false?
A.
They are used as cation exchangers.
B.
They have open structure which enables them to take up small molecules.
C.
Zeolites are aluminosilicates having three dimensional network.
D.
Some of the SiO$_4^{4 - }$ units are replaced by AlO$_4^{5 - }$ and AlO$_6^{9 - }$ ions in zeolites.
2004 Q98 NEET MCQ
10 Mar 2026
Among K, Ca, Fe and Zn, the element which can from more than one binary compound with chlorine is
A.
Fe
B.
Zn
C.
K
D.
Ca
2003 Q99 NEET MCQ
10 Mar 2026
Which one of the following compounds is not a protonic acid?
A.
B(OH)3
B.
PO(OH)3
C.
SO(OH)2
D.
SO2(OH)2
2003 Q100 NEET MCQ
10 Mar 2026
Which one of the following statements is not true?
A.
Among halide ions, iodide is the most powerful reducing agent.
B.
Fluorine is the only halogen that does not show a variable oxidation state.
C.
HOCl is a stronger acid than HOBr.
D.
HF is a stronger acid than HCl.