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Chemistry
List of top Chemistry Questions
Hybrid state of central oxygen atom in ether is
Chemistry
Alcohols, Phenols and Ethers
How many structures are possible for
$C_5H_8$
with one triple bond?
Chemistry
Hydrocarbons
How many layers are adsorbed in chemical adsorption ?
Chemistry
Surface Chemistry
How many lithium atoms are present in a unit cell with edge length
$3.5$
$?$
and density
$0.53\,g\,cm^{-3}$
? (Atomic mass of
$Li = 6.94$
)
Chemistry
The solid state
How many electrons in
$_{19}K$
have
$n = 3 ; l = 0$
?
Chemistry
Structure of atom
How many electrons in copper atom
$(_{29}Cu)$
have
$(n + l) = 4$
Chemistry
Structure of atom
How many electrons are involved in oxidation by
$KMnO_4$
in basic medium ?
Chemistry
Redox reactions
How many coulombs of electricity are consumed when a 100 mA current is passed through a solution of
$AgNO_3$
for half an hour during an electrolys is experiment ?
Chemistry
Electrochemistry
How many
$ {Cl^{-}}$
ions are there around
$ {Na^{+}}$
ion in
$NaCl$
crystal ?
Chemistry
The solid state
How long 2 ampere of current is passed to supply 72000 C of charge ?
Chemistry
Electrochemistry
How does the ionization energy of 1st group elements vary ?
Chemistry
GROUP 1 ELEMENTS
Hot conc.
$H_2SO_4$
acts as moderately strong oxidising agent. It oxidises both metals and non-metals. Which of the following elements is oxidised by cone.
$H_2SO_4$
into two gaseous products?
Chemistry
p -Block Elements
How do we separate two sulphide ores by froth floatation method?
Chemistry
General Principles and Processes of Isolation of Elements
Holme?? signal uses chemical compound
Chemistry
p -Block Elements
Hofmann bromamide degradation reaction is shown by_____________ .
Chemistry
Amines
Highest oxidation state of manganese in fluorides is
$+4 (MnF_4)$
but highest oxidation state in oxides is
$+7 (Mn_2O_7)$
because
Chemistry
d -and f -Block Elements
Higher concentration of nitrogen dioxide in atmospheric air causes
Chemistry
Environmental Chemistry
HF is not stored in glass bottles because
Chemistry
p -Block Elements
HI can be prepared by all the following methods, except
Chemistry
p -Block Elements
Hexafluorocobaltate (III) ion is a high spin complex. The hybrid state of cobalt is
Chemistry
coordination compounds
Hess's law states,
Chemistry
Thermodynamics
Helium-oxygen mixture is used by deep sea diversin preference to nitrogen-oxygen mixture because
Chemistry
p -Block Elements
Heating of ore in presence of air to remove sulphur impurity is called
Chemistry
General Principles and Processes of Isolation of Elements
Heating pyrites air to remove sulphur dioxide is known as
Chemistry
General Principles and Processes of Isolation of Elements
Heating an aqueous solution of aluminium chloride to dryness will give
Chemistry
p -Block Elements
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