>
Chemistry
List of top Chemistry Questions
What is the value of electron gain enthalpy of
$Na^+$
if
$IE_1$
of
$Na = 5.1 \, eV$
?
NEET (UG) - 2011
NEET (UG)
Chemistry
Classification of elements and periodicity in properties
Clemmensen reduction of a ketone is carried out in the presence of which of the following?
NEET (UG) - 2011
NEET (UG)
Chemistry
Aldehydes, Ketones and Carboxylic Acids
A solution contains
${Fe^{2+}, Fe^{3+}}$
and
$I^-$
ions. This solution was treated with iodine at
${ 35^{\circ} C. E^{\circ}}$
for
${Fe^{3+} /Fe^{2+}}$
is
$+0.77 \, V$
and
$E^{\circ}$
for
$I_2/2I^- = 0.536 \, V.$
The favourable redox reaction is-
NEET (UG) - 2011
NEET (UG)
Chemistry
Electrochemistry
A gaseous mixture was prepared by taking equal moles of
$CO$
and
$N_2.$
If the total pressure of the mixture was found
$1$
atmosphere, the partial pressure of the nitrogen
$(N_2)$
in the mixture is
NEET (UG) - 2011
NEET (UG)
Chemistry
States of matter
Two different electrolytic cells filled with molten
$Cu(NO_3)_2$
and molten
$Al(N0_3)_3$
respectively are connected in series. When electricity is passed 2. 7 g Al is deposited on electrode. Calculate the weight of Cu deposited on cathode.
$[Cu = 63 .5; Al= 27 .0 g mol^{-1} ]$
GUJCET - 2011
GUJCET
Chemistry
Electrochemistry
Enthalpy change for the reaction,
$4 H _{( g )} \rightarrow 2 H _{2( g )}$
is
$-869.6\, kJ$
The dissociation energy of
$H - H$
bond is
NEET (UG) - 2011
NEET (UG)
Chemistry
Thermodynamics
The correct order of increasing bond length of
$ C - H, C - O, C - C$
and
$ C = C $
is
NEET (UG) - 2011
NEET (UG)
Chemistry
Chemical bonding and molecular structure
The pairs of species of oxygen and their magnetic behaviours are noted below. Which of the following presents the correct description ?
NEET (UG) - 2011
NEET (UG)
Chemistry
Chemical bonding and molecular structure
Ammonia gas does not evolve from the complex
$FeCl_3$
$\cdot$
$4NH_3$
but it gives white precipitate with aqueous solution of
$AgNO_3.$
Coordination number of central metal ion in the above complex is six. Give IUPAC name of the complex.
GUJCET - 2011
GUJCET
Chemistry
coordination compounds
Give IUPAC name of the product, when acetamide is heated with anhydrous phosphorus pentoxide
GUJCET - 2011
GUJCET
Chemistry
Aldehydes, Ketones and Carboxylic Acids
How glucose is related with fructose?
GUJCET - 2011
GUJCET
Chemistry
Biomolecules
For a first order reaction, the initial concentration of a reactant is 0.05 M. After 45 min it is decreased by 0.015 M. Calculate halfreaction time.
$(t_{1/2})$
GUJCET - 2011
GUJCET
Chemistry
Chemical Kinetics
How can you say that glucose is cyclic compound?
GUJCET - 2011
GUJCET
Chemistry
Biomolecules
$1$
-Chlorobutane on reaction with alcoholic potash gives
JKCET - 2011
JKCET
Chemistry
Haloalkanes and Haloarenes
Which one of the following is not aromatic?
JKCET - 2011
JKCET
Chemistry
Hydrocarbons
Among the following, the compound that is readily soluble in water is
JKCET - 2011
JKCET
Chemistry
GROUP 1 ELEMENTS
When
$O_2$
is converted into
$O_2^+$
KCET - 2011
KCET
Chemistry
Chemical bonding and molecular structure
Which one of the following is employed as Antihistamine?
NEET (UG) - 2011
NEET (UG)
Chemistry
Chemistry in Everyday Life
Two aromatic compounds having formula
$C_7H_8O$
which are easily identifiable by
$FeCl_3$
solution test (violet colouration) are
WBJEE - 2011
WBJEE
Chemistry
Phenols
Reaction of formaldehyde and ammonia gives
WBJEE - 2011
WBJEE
Chemistry
Preparation of Amines
The amount of the heat released when
$20\,mL$
$0.5\, M\, NaOH$
is mixed with
$100\, mL\, 0.1\, M\, HCl$
is
$x\, kJ$
. The heat of neutralization is
WBJEE - 2011
WBJEE
Chemistry
Some basic concepts of chemistry
Which of the following compounds has maximum volatility?
WBJEE - 2011
WBJEE
Chemistry
Aldehydes, Ketones and Carboxylic Acids
The ease of Nitration of the following three hydrocarbons follows the order
WBJEE - 2011
WBJEE
Chemistry
Hydrocarbons
The ease of dehydrohalogenation of alkyl halide with alcoholic
$KOH$
is
WBJEE - 2011
WBJEE
Chemistry
Haloalkanes and Haloarenes
Among the alkenes which one produces tertiary butyl alcohol on acid hydration
WBJEE - 2011
WBJEE
Chemistry
Hydrocarbons
Prev
1
...
400
401
402
403
404
...
770
Next