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Chemistry
List of top Chemistry Questions
When r, P and M represent rate of diffusion, pressure and molecular mass, respectively, then the ratio of the rates of diffusion
$(r_A/r_B)$
of two gases A and B, is given as:
AIEEE - 2011
AIEEE
Chemistry
States of matter
The molecular velocity of any gas is:
AIEEE - 2011
AIEEE
Chemistry
States of matter
A 5.2 molal aqueous solution of methyl alcohol,
$CH _{3} OH$
is supplied. What is the mole fraction of methyl alcohol in the solution?
AIEEE - 2011
AIEEE
Chemistry
Expressing Concentration of Solutions
Consider thiol anion
$(RS^?)$
and alkoxy anion
$(RO^?)$
. Which of the following statements is correct ?
AIEEE - 2011
AIEEE
Chemistry
Alcohols, Phenols and Ethers
$S_N2$
reaction readily occurs in
AIIMS - 2011
AIIMS
Chemistry
Haloalkanes and Haloarenes
$\beta$
-pleated sheet structure of protein shows maximum extension. Intermolecular hydrogen bonding is present in them.
AIIMS - 2011
AIIMS
Chemistry
Biomolecules
The correct increasing order of reactivity for the following molecules towards electrophilic aromatic substitution is
AIIMS - 2011
AIIMS
Chemistry
Alcohols, Phenols and Ethers
The correct decreasing order of
$pK_a$
is
AIIMS - 2011
AIIMS
Chemistry
Alcohols, Phenols and Ethers
When the same quantity of current is passed through
$ {CuSO_4}$
and
$ {AgNO_3}$
solution 2.7 g of silver is deposited. The amount of copper deposited is
COMEDK UGET - 2011
COMEDK UGET
Chemistry
Electrochemistry
The pOH of 0.0005 M sulphuric acid is
COMEDK UGET - 2011
COMEDK UGET
Chemistry
p -Block Elements
Bauxite is
COMEDK UGET - 2011
COMEDK UGET
Chemistry
General Principles and Processes of Isolation of Elements
Siderite is
COMEDK UGET - 2011
COMEDK UGET
Chemistry
General Principles and Processes of Isolation of Elements
Bond order in nitrogen molecule is
COMEDK UGET - 2011
COMEDK UGET
Chemistry
Chemical bonding and molecular structure
The radius ratio of a substance is 0.32. The coordination number of the substance is
COMEDK UGET - 2011
COMEDK UGET
Chemistry
The solid state
Which of the following is pheromone?
GUJCET - 2011
GUJCET
Chemistry
Chemistry in Everyday Life
Which of the following enzymes is present in animals like cow, buffaloes, etc. to digest compound like paper, cloth, etc.?
GUJCET - 2011
GUJCET
Chemistry
Chemistry in Everyday Life
Which one of the following represents the correct ratio of the energy of electron in ground state of
$H$
atom to that of the electron in the first excited state of
$Li^{+}$
?
UPSEE - 2011
UPSEE
Chemistry
Structure of atom
Which one of the following has the lowest ionization energy?
WBJEE - 2011
WBJEE
Chemistry
Classification
The correct order of decreasing acidity of nitrophenols will be
WBJEE - 2011
WBJEE
Chemistry
Phenols
The correct decreasing order of dipole moment in $ CH_{3}Cl,\,CH_{3} Br$ and $ CH_{3}F $ is
Delhi UMET/DPMT - 2011
Delhi UMET/DPMT
Chemistry
Polarity of bonds
Term used for accumulation of non-degradable pollutants in higher trophic level is
OJEE - 2011
OJEE
Chemistry
Atmospheric pollution
Which ion has the largest radius?
DUET - 2011
DUET
Chemistry
Classification of elements and periodicity in properties
The correct decreasing order of dipole moment in
$ CH_{3}Cl,\,CH_{3} Br$
and
$ CH_{3}F $
is
DUET - 2011
DUET
Chemistry
Polarity of bonds
In Tollens test, aldehydes
DUET - 2011
DUET
Chemistry
Aldehydes, Ketones and Carboxylic Acids
Decreasing order of reactivity of hydrogen halide acids in the conversion of
$ ROH\to RX $
is
DUET - 2011
DUET
Chemistry
Alcohols, Phenols and Ethers
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