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Chemistry
List of top Chemistry Questions
In a closed flask of 5 L, 1.0 g of
$H_2$
is heated from 300 to 600 K. Which statement is not correct?
NEET (UG) - 1991
NEET (UG)
Chemistry
States of matter
In compound ' X - all the bond angles are exactly 109
$^{\circ}$
28', 'X - is
NEET (UG) - 1991
NEET (UG)
Chemistry
Chemical bonding and molecular structure
Which overlap is involved in HCl molecule ?
KCET - 1991
KCET
Chemistry
Chemical bonding and molecular structure
The oxidation state of the most electronegative element in the products of the reaction.
$ BaO_2 $
with dil,
$ H_2SO_4 $
are
JEE Advanced - 1991
JEE Advanced
Chemistry
GROUP 1 ELEMENTS
The reaction which proceed in the forward direction is
JEE Advanced - 1991
JEE Advanced
Chemistry
d block elements
Natural rubber is a polymer of
AIIMS - 1991
AIIMS
Chemistry
Polymers
As the atomic number of halogens increases the halogens
MP PMT - 1991
MP PMT
Chemistry
p -Block Elements
AgCl dissolves in
$NH_4OH$
due to the formation of
AIIMS - 1991
AIIMS
Chemistry
coordination compounds
Which of the following is the most stable carbocation (carbonium ion)?
AIPMT - 1991
AIPMT
Chemistry
Organic Chemistry- Some Basic Principles and Techniques
Isomers of a substance must have the same
AIPMT - 1991
AIPMT
Chemistry
Organic Chemistry- Some Basic Principles and Techniques
Glass is a
AIPMT - 1991
AIPMT
Chemistry
p -Block Elements
There is no S- S bond in
JEE Advanced - 1991
JEE Advanced
Chemistry
p -Block Elements
The reagents,
$NH_4Cl$
and aqueous
$NH_3$
will precipitate
JEE Advanced - 1991
JEE Advanced
Chemistry
Organic Chemistry- Some Basic Principles and Techniques
According to kinetic theory of gases, for a diatomic molecule
JEE Advanced - 1991
JEE Advanced
Chemistry
States of matter
1 -chlorobutane on reaction with alcoholic potash gives
JEE Advanced - 1991
JEE Advanced
Chemistry
Haloalkanes and Haloarenes
The linear structure assumed by
JEE Advanced - 1991
JEE Advanced
Chemistry
Chemical bonding and molecular structure
The tendency of
\(BF_3, BCI_3 \, and \, BBr_3\)
behave as Lewis acid decreases in the sequence
NEET (UG) - 1990
NEET (UG)
Chemistry
Acids and Bases
The density of neon will be minimum at
JEE Advanced - 1990
JEE Advanced
Chemistry
States of matter
Which one shows maximum hydrogen bonding?
NEET (UG) - 1990
NEET (UG)
Chemistry
Chemical bonding and molecular structure
In van der Waals equation of state for a non-ideal gas, the term that accounts for inter molecular forces is
NEET (UG) - 1990
NEET (UG)
Chemistry
States of matter
The reagents which can be used to distinguish acetophenone from benzophenone is (are)
NEET (UG) - 1990
NEET (UG)
Chemistry
Aldehydes, Ketones and Carboxylic Acids
An ion has 18 electrons in the outermost shell, it is
NEET (UG) - 1990
NEET (UG)
Chemistry
Structure of atom
The number of gram molecules of oxygen in
$6.02 \times 10^{24}$
CO molecules is
NEET (UG) - 1990
NEET (UG)
Chemistry
Mole concept and Molar Masses
The complex ion
$[Co(NH_3)_6]^{3+}$
is formed by
$sp^3d^2$
hybridisation. Hence, the ion should possess
NEET (UG) - 1990
NEET (UG)
Chemistry
Hybridisation
The molecular weight of
$O_2$
and
$SO_2$
are 32 and 64 respectively. At
$15^{\circ}C$
and 150 mmHg pressure, 1L of
$O_2$
contains -N - molecules. The number of molecules in 2L of
$SO_2$
under the same conditions of temperature and pressure will be
NEET (UG) - 1990
NEET (UG)
Chemistry
Stoichiometry and Stoichiometric Calculations
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