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Chemistry
List of top Chemistry Questions
What is the electrode potential (in
$ V $
) of the following electrode at
$ {{25}^{o}}C $
?
$ N{{i}^{2+}}(0.1\,\,M)|Ni(s) $
(Standard reaction potential of
$ N{{i}^{2+}}|Ni $
is
$ -0.25\,\,V,\,\,\frac{2.303RT}{F}=0.06) $
Rajasthan PMT - 2008
Rajasthan PMT
Chemistry
Nernst Equation
Calculate the concentration of
$NaOH$
solution in g/ml. which has the same normality as that of a solution of
$HCl$
of concentration
$0.04 \,g/ml$
UP CPMT - 2008
UP CPMT
Chemistry
Stoichiometry and Stoichiometric Calculations
The solution of
$AlCl_3$
in water is acidic due to
UP CPMT - 2008
UP CPMT
Chemistry
Solubility Equilibria Of Sparingly Soluble Salts
Which is not fat soluble vitamin?
UP CPMT - 2008
UP CPMT
Chemistry
Vitamins
Units of rate constant for first and zero order reactions in terms of molarity
$M$
unit are respectively
UP CPMT - 2008
UP CPMT
Chemistry
Rate of a Chemical Reaction
Which of the following molecules posesses trigonal bipvramidal geometry.
UP CPMT - 2008
UP CPMT
Chemistry
The Valence Shell Electron Pair Repulsion (VSEPR) Theory
The atomic number of an element
$M$
is
$26$
. How many electrons are present in the
$M$
-shell of the element in its state
UP CPMT - 2008
UP CPMT
Chemistry
Electronic Configurations Of Elements And The Periodic Table
Tropylium cation is aromatic in nature.
The only property that determines its aromatic behaviour is its planar structure.
AIIMS - 2008
AIIMS
Chemistry
Aromatic Hydrocarbon
Colloidal solutions are stable but colloidal particles do not settle down. Brownian movement counters the force of gravity actively on colloidal particles.
AIIMS - 2008
AIIMS
Chemistry
Colloids
Bleaching powder reacts with dilute acids to evolve chlorine. The chlorine liberated by the action of dilute acids on bleaching powder is called available chlorine.
AIIMS - 2008
AIIMS
Chemistry
p -Block Elements
Which of the following chemical reactions depicts the oxidizing behaviour of
$H_{2} SO_{4}$
?
AIEEE - 2008
AIEEE
Chemistry
Group 16 Elements
How many moles of magnesium phosphate,
$Mg_{3} \left(po_{4}\right)_{2}$
will contain 0.25 mole of oxygen atoms ?
AIEEE - 2008
AIEEE
Chemistry
Mole concept and Molar Masses
HBr reacts with
$CH_{2} =CH-OCH_{3}$
under anhydrous conditions at room temperature to give:
AIEEE - 2008
AIEEE
Chemistry
Chemical Reactions
The organic chloro compound, which shows complete sterochemical inversion during a
$ {S_{N^2}}$
reaction, is
AIEEE - 2008
AIEEE
Chemistry
Haloalkanes and Haloarenes
$0.01 M$
solution of
$KCl$
and
$BaCl _{2}$
are prepared in water. The freezing points of
$KCl$
is found to be
$-2{ }^{\circ} C$
. What is the freezing point of
$BaCl _{2}$
to be completely ionised?
AIIMS - 2008
AIIMS
Chemistry
Colligative Properties
A unit cell of sodium chloride has four formula units. The edge length of the unit cell is
$0.0564\, nm$
. What is the density of sodium chloride?
AIIMS - 2008
AIIMS
Chemistry
The solid state
Non-oxide ceramics can be
AIIMS - 2008
AIIMS
Chemistry
Concentration of ores
Which one of the following is most reactive towards electrophilic attack ?
AIPMT - 2008
AIPMT
Chemistry
Organic Chemistry - Some Basic Principles and Techniques
When
$o$
- or
$ p- $
phenolsulphonic acid is treated with bromine water, the product formed is
Manipal - 2008
Manipal
Chemistry
Alcohols, Phenols and Ethers
In Williamson's synthesis, ethoxyethane is prepared by
Manipal - 2008
Manipal
Chemistry
Alcohols, Phenols and Ethers
In which of the following compounds
$ -OH $
group is least reactive?
Manipal - 2008
Manipal
Chemistry
Alcohols, Phenols and Ethers
If
$ N{{a}^{+}} $
ion is larger than
$ M{{g}^{2+}} $
ion and
$ {{S}^{2-}} $
ion is larger than
$Cl^-$
ion, which of the following will be stable soluble in water?
Manipal - 2008
Manipal
Chemistry
Chemical bonding and molecular structure
Anisole can be prepared by the action of methyl iodide on sodimn phenate. The reaction is called
KCET - 2008
KCET
Chemistry
Alcohols, Phenols and Ethers
An organic compound,
$ {{C}_{3}}{{H}_{6}}O $
does not give a precipitate with
$2, 4$
-dinitrophenyl hydrazine reagent and does not react with metallic sodium. It could be
Manipal - 2008
Manipal
Chemistry
Alcohols, Phenols and Ethers
Acetophenone when reacted with a base ,
$C_2 H_5 ONa,$
yields a stable compound which has the structure . The state of hybridisation of S in
$SO_2$
is similar to that of
AIPMT - 2008
AIPMT
Chemistry
Aldehydes, Ketones and Carboxylic Acids
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