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Chemistry
List of top Chemistry Questions
Which shows maximum catenation property ?
Chemistry
Group 16 Elements
Which solid will have weakest intermolecular forces?
Chemistry
The solid state
Which step is chain propagation step in the following mechanism?
$(i)$
$ {Cl2 ->[hv] Cl^{?? + Cl^{??}$
$(ii)$
$ {Cl^{?? + CH4 -> ^{??CH3 + HCl}$
$(iii)$
$ {Cl^{?? + Cl^{?? -> Cl2}$
$(iv)$
$ {^{??CH3 + l^{??C -> CH3Cl}$
Chemistry
Hydrocarbons
Which thermodynamic property provides a measure of randomness in the system^?
Chemistry
Thermodynamics
Which thermochemical process is shown by the following figure?
Chemistry
Thermodynamics
Which type of overlapping is shown by
$p (p_x, p_y$
and
$p_z)$
-orbitals?
Chemistry
Chemical bonding and molecular structure
Which transition metal has lowest density ?
Chemistry
d -and f -Block Elements
Which types of bonds are present between two carbon atoms in acetylene molecule?
Chemistry
Chemical bonding and molecular structure
Which value of
$l$
will represent double dumb-bell shape of the orbital ?
Chemistry
Structure of atom
White P is more reactive than
$N_2$
because
Chemistry
p -Block Elements
Why all
$P - F$
bonds in
$PF_5$
are not equivalent ?
Chemistry
p -Block Elements
Why do noble gases have positive electron gain enthalpy?
Chemistry
Classification of elements and periodicity in properties
Why is ferric hydroxide colloid positively charged when prepared by adding ferric chloride to hot water?
Chemistry
Surface Chemistry
Why is alum added to water containing suspended impurities?
Chemistry
Surface Chemistry
Why is partial roasting of sulphide ore done in metallurgy of copper?
Chemistry
General Principles and Processes of Isolation of Elements
Why is the electron gain enthalpy of
$O$
or
$F$
less than that of
$S$
or
$Cl$
?
Chemistry
Classification of elements and periodicity in properties
Within each transition series, the oxidation states
Chemistry
d -and f -Block Elements
Wolframite is separated from cassiterite by
Chemistry
General Principles and Processes of Isolation of Elements
Wurtz reaction is used to unite
Chemistry
Hydrocarbons
$??? Identify correct statements about
$X$
,
$A$
,
$B$
,
$C\, \&\, D$
, which cause global warming. i. $??? ii. ????ombines with oxygen to produce $??? iii. ??? iv. ????auses acid rain
Chemistry
Environmental Chemistry
$X$
mL of
$H_2$
effuse through a hole in a container in 5 seconds. The time taken for the effusion of the same volume of the gas specified below under identical conditions is
Chemistry
States of matter
Xenon best reacts with
Chemistry
p -Block Elements
X reacts with NaOH (aqueous solution) to form Y and
$H_2$
. Aqueous solution of Y is heated to 323- 333 K and on passing
$ {CO_2}$
into it,
$ {Na_2CO_3}$
and Z were formed. When Z is heated to
$1200^{\circ}C , { Al_2O_3}$
is formed. X, Y and Z respectively are
Chemistry
p -Block Elements
Zeta potential (or electrokinetic potential) is the
Chemistry
Surface Chemistry
Zone refining is used for the
Chemistry
General Principles and Processes of Isolation of Elements
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