>
Chemistry
List of top Chemistry Questions
Which of the following is the chief ore of copper?
Manipal - 2004
Manipal
Chemistry
General Principles and Processes of Isolation of Elements
Which of the following reagent can distinguish between
$1$
-Butyne and
$2$
-Butyne?
Manipal - 2004
Manipal
Chemistry
Hydrocarbons
Which of the following will not form a yellow precipitate on heating with an alkaline solution of iodine?
AIPMT - 2004
AIPMT
Chemistry
Alcohols, Phenols and Ethers
Which one of the following statements about the zeolites is false ?
AIPMT - 2004
AIPMT
Chemistry
p -Block Elements
Which carbon is more electronegative?
KEAM - 2004
KEAM
Chemistry
Chemical bonding and molecular structure
Ionic radii are
AIPMT - 2004
AIPMT
Chemistry
Classification of elements and periodicity in properties
Which of the following is not a function of proteins?
KEAM - 2004
KEAM
Chemistry
Biomolecules
Which of the following is not considered as an organometallic compound ?
AIIMS - 2004
AIIMS
Chemistry
coordination compounds
Which one of the following ores is best concentrated by froth - floatation method?
AIEEE - 2004
AIEEE
Chemistry
General Principles and Processes of Isolation of Elements
An ideal gas expands in volume from
$1?10^{-3} m^3$
to
$1?10^{-2} m^3$
at
$300\, K$
against a constant pressure of
$1?10^5\, Nm^{-2}$
. The work done is
AIEEE - 2004
AIEEE
Chemistry
Thermodynamics
Which of the following sets of quantum numbers is correct for an electron in 4f orbital?
AIEEE - 2004
AIEEE
Chemistry
Structure of atom
As the temperature is raised from
$20^{\circ}C$
to
$40^{\circ}C$
, the average kinetic energy of neon atoms changes by a factor of which of the following?
AIEEE - 2004
AIEEE
Chemistry
States of matter
The standard reduction potential
$E^{o}$
for the half reactions are as:
$Z n \rightarrow Z n^{2+}+2 e^{-}, E^{o}=0.76\, V$
$C u \rightarrow C u^{2+}+2 e^{-}, E^{o}=0.34\, V$
The emf for the cell reaction:
$Z n+C u^{2+} \rightarrow Z n^{2}+C u$
BCECE - 2004
BCECE
Chemistry
Electrochemistry
Arrange the following as increase in oxidation number : (i)
$Mn ^{2+}$
(ii)
$MnO _{2}$
(iii)
$KMnO _{4}$
(iv)
$K _{2} MnO _{4}$
BCECE - 2004
BCECE
Chemistry
Redox reactions
The number of lattice arrangements in different crystal systems are:
BHU UET - 2004
BHU UET
Chemistry
Properties of Solids
According to Bohr's principle, the relation between principle quantum number
$(n)$
and radius of orbit is :
BHU UET - 2004
BHU UET
Chemistry
Quantum Mechanical Model of Atom
If
$20 \,g$
of a solute was dissolved in
$500 \,mL$
of water and osmotic pressure of the solution was found to be
$600\, mm$
of
$Hg$
at
$15^{\circ} C$
, then molecular weight of the solute is:
BHU UET - 2004
BHU UET
Chemistry
Mole concept and Molar Masses
The number of sodium atoms in
$2$
moles of sodium ferrocyanide is:
BHU UET - 2004
BHU UET
Chemistry
Mole concept and Molar Masses
The state of hybridisation of
$B$
in
$ BC{{l}_{3}} $
is:
BHU UET - 2004
BHU UET
Chemistry
Hybridisation
Which is more acidic ?
OJEE - 2004
OJEE
Chemistry
Phenols
Sucrose, a common sugar, is composed of
OJEE - 2004
OJEE
Chemistry
Enzymes
When methyl-t-butyl ether is formed ?
OJEE - 2004
OJEE
Chemistry
Chemical Reactions
What is the pressure of 2 mole of $NH_3$ at 27$^\circ$C when its volume is 5 lit. in van der Waals equation (a = 4.17, b = 0 .03711)
OJEE - 2004
OJEE
Chemistry
Van Der Waals equation
N forms $NCl_3$ whereas P can form both $PCl_3$ and $PCl_5$. Why ?
OJEE - 2004
OJEE
Chemistry
d block elements
Which of the following pairs give positive Tollen?s test?
IIT JEE - 2004
IIT JEE
Chemistry
Aldehydes, Ketones and Carboxylic Acids
Prev
1
...
711
712
713
714
715
...
970
Next