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Chemistry
List of top Chemistry Questions
Equivalent and molecular masses are same in
COMEDK UGET - 2011
COMEDK UGET
Chemistry
Some basic concepts of chemistry
12 g of Mg with excess of HCI at NTP gives
COMEDK UGET - 2011
COMEDK UGET
Chemistry
Some basic concepts of chemistry
The molality of a urea solution in which 0.0100 g of urea,
$[(NH_2)_2CO]$
is added to 0.3000
$dm^3$
of water at STP is:
AIEEE - 2011
AIEEE
Chemistry
Some basic concepts of chemistry
What is the equivalent weight of
$SnCl _{2}$
in the following reaction,
$SnCl _{2}+C l_{2} \rightarrow S n C l_{4} ?$
AFMC - 2011
AFMC
Chemistry
Some basic concepts of chemistry
What is the time (in sec) required for depositing all the silver present in
$125\, mL$
of
$1\, M \, AgNO _{3}$
solution by passing a current of
$241.25 \, A$
? (
$IF = 96500$
coulombs)
AFMC - 2011
AFMC
Chemistry
Electrolysis
$Mg ^{2+}$
is isoelectronic with
AFMC - 2011
AFMC
Chemistry
Molecular Orbital Theory
Which one of the following species is diamagnetic in nature?
AIIMS - 2011
AIIMS
Chemistry
Molecular Orbital Theory
Most stable carbocation is
Delhi UMET/DPMT - 2011
Delhi UMET/DPMT
Chemistry
Organic Chemistry- Some Basic Principles and Techniques
In Kjeldahl's method, the nitrogen present is estimated as
UP CPMT - 2011
UP CPMT
Chemistry
Organic Chemistry- Some Basic Principles and Techniques
Most stable carbocation is
DUET - 2011
DUET
Chemistry
Organic Chemistry- Some Basic Principles and Techniques
: Methyl cyanide has higher boiling point than methyl isocyanide. : Dipole moment of methyl cyanide is higher than that of methyl isocyanide.
AIIMS - 2011
AIIMS
Chemistry
Organic Chemistry- Some Basic Principles and Techniques
If the salts
$ M_2X $
,
$ QY_2 $
and
$ PZ_3 $
have the same solubilities, their
$ K_{sp} $
values are related as
AMUEEE - 2011
AMUEEE
Chemistry
Equilibrium
$K_{sp}$
of
$CaSO_4\cdot5H_2O$
is 9 x
$10^{-6}$
, find the volume for 1 g of
$CaSO_4$
(M.wt. = 136).
AIIMS - 2011
AIIMS
Chemistry
Equilibrium
What is the
$pH$
of a
$0.5\, M$
aqueous solution of
$NH_4Cl$
with
$0.2\, M \,NH_3$
?
$ (pK_a = 9.25)$
UP CPMT - 2011
UP CPMT
Chemistry
Equilibrium
Le-Chatelier?s principle is not applicable to
AMUEEE - 2011
AMUEEE
Chemistry
Equilibrium
Given a gas phase reaction,
$\hspace10mm 2A(g)+B(g) \rightleftharpoons C(g)+D(g)$
Which one of the following changes will affect the value of
$K_c$
?
Delhi UMET/DPMT - 2011
Delhi UMET/DPMT
Chemistry
Equilibrium
The equilibrium constant for mutarotation
$\alpha-D \rightleftharpoons \beta-D$
Glucose is
$1.8$
. What percentage of
$\alpha$
form remains at equilibrium?
Delhi UMET/DPMT - 2011
Delhi UMET/DPMT
Chemistry
Equilibrium
Solubility product of
${PbCl_2}$
at
${298\, K}$
is
${1 \times 10^{-6}}$
. At this temperature, solubility of
${PbCl_2\, (in\, mol/L)}$
is
JIPMER - 2011
JIPMER
Chemistry
Equilibrium
A vessel at 1000 K contains
$CO_2$
with a pressure of 0.5 atm. Some of the
$CO_2$
is converted into CO on the addition of graphite. It the total pressure at equilibrium is 0.8 atm, the value of K is
AIEEE - 2011
AIEEE
Chemistry
Equilibrium
An acid HA ionises as
$HA {\rightleftharpoons} H^{+} + A^{-}$
The pH of 1.0 M solution is 5. Its dissociation constant would be:
AIEEE - 2011
AIEEE
Chemistry
Equilibrium
Identify the incorrect statement from the following:
AIEEE - 2011
AIEEE
Chemistry
Environmental Chemistry
$bcc$
and
$hcp$
has same packing efficiency. Both have same number of atoms per unit cell and same arrangement.
AIIMS - 2011
AIIMS
Chemistry
The solid state
The following carbohydrate is
JEE Advanced - 2011
JEE Advanced
Chemistry
Biomolecules
Neutron was discovered by
JIPMER - 2011
JIPMER
Chemistry
Structure of atom
Bombardment of aluminium by a-particle leads to its artificial disintegration in two ways, (i) and (ii) as shown. Products X , Y and Z respectively, are
JEE Advanced - 2011
JEE Advanced
Chemistry
Nuclear physics
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