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1

AIPMT 2012 Mains

MCQ (Single Correct Answer)
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

Explanation

If acidic nature is high, Ka is high and pKa is low.

since pKa = – log Ka

Hence the order of pKa will be

H2O > H2S > H2Se > H2Te
2

AIPMT 2012 Prelims

MCQ (Single Correct Answer)
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 $$\buildrel \Delta \over \longrightarrow $$

Explanation

Fe2(SO4)3 $$\buildrel \Delta \over \longrightarrow $$ Fe2O3 + 3SO3
3

AIPMT 2012 Prelims

MCQ (Single Correct Answer)
In which of the following compounds, nitrogen exhibits highest oxidation state?
A
N2H4
B
NH3
C
N3H
D
NH2OH

Explanation

N2H4 : Oxidation state of N = – 2

NH3 : Oxidation state of N = – 3

N3H : Oxidation state of N = – 1/3

NH2OH : Oxidation state of N = – 1

$$ \therefore $$ Highest oxidation state = –1/3
4

AIPMT 2012 Prelims

MCQ (Single Correct Answer)
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.

Explanation

Hypophosphorus acid is a monoprotic acid.

Questions Asked from p-Block Elements

On those following papers in MCQ (Single Correct Answer)
Number in Brackets after Paper Indicates No. of Questions
NEET 2021 (3)
NEET 2020 Phase 1 (5)
NEET 2019 (6)
NEET 2018 (2)
NEET 2017 (3)
NEET 2016 Phase 2 (2)
NEET 2016 Phase 1 (5)
AIPMT 2015 (5)
AIPMT 2015 Cancelled Paper (1)
AIPMT 2014 (1)
NEET 2013 (Karnataka) (2)
NEET 2013 (6)
AIPMT 2012 Mains (1)
AIPMT 2012 Prelims (3)
AIPMT 2011 Mains (2)
AIPMT 2011 Prelims (1)
AIPMT 2010 Mains (1)
AIPMT 2010 Prelims (4)
AIPMT 2009 (3)
AIPMT 2008 (1)
AIPMT 2007 (3)
AIPMT 2006 (5)
AIPMT 2005 (4)
AIPMT 2004 (2)
AIPMT 2003 (1)
AIPMT 2002 (2)
AIPMT 2001 (1)
AIPMT 2000 (2)

Chapters Map

Physical Chemistry

Gaseous State
Solid State
Surface Chemistry
Nuclear Chemistry
Some Basic Concepts of Chemistry
Thermodynamics
Solutions
Electrochemistry
Chemical Kinetics
Structure of Atom
Equilibrium
Redox Reactions

Inorganic Chemistry

Periodic Table and Periodicity
Chemical Bonding and Molecular Structure
Hydrogen
s-Block Elements
p-Block Elements
Processes of Isolation of Elements
d and f Block Elements
Coordination Compounds
Environmental Chemistry

Organic Chemistry

Alcohol, Phenols and Ethers
Hydrocarbons
Chemistry in Everyday Life
Haloalkanes and Haloarenes
Organic Compounds Containing Nitrogen
Biomolecules
Polymers
Some Basic Concepts of Organic Chemistry
Aldehydes, Ketones and Carboxylic Acids

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