List of top Chemistry Questions

: The conversion of fresh precipitate to colloidal state is called peptization. : It is caused by addition of common ions.
Ozone is an allotrope of oxygen. Oxygen is bluish colour liquid and in singlet state it is more paramagnetic.
F is more electronegative than Cl F has high electron affinity than Cl.
: $F-F$ bond in $F _{2}$ molecule is strong. : $F$ atom is small in size.
: Chlorine has higher electron affinity than fluorine. : Chlorine is a poor oxidising than fluorine.
Benzene diazonium salt on boiling with water forms phenol. C $-$ N bond is polar.
: At high pressure, the compression factor $Z$ is $\left(1+\frac{P b}{R T}\right)$. : At high pressure van der Waals' equation is modified as $P(V-b)=R T$.
: According to Kohlrausch law the molar conductivity of a strong electrolyte at infinite dilution is sum of molar conductivities of its ions. : The current carried by cation and anion is always equal.
An atom has electronic configuration $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{3} 4 s^{2}$, you will place it in
A reaction occurs spontaneously if
$CH _{3} OC _{2} H _{5}$ and $\left( CH _{3}\right)_{3} C - OCH _{3}$ are treated with hydroiodic acid. The fragments after reactions obtained are
One mole of methanol when burnt in $O _{2}$, gives out $723\, kJ\, mol ^{-1}$ heat. If one mole of $O _{2}$ is used, what will be the amount of heat evolved?
Which of the following does not exist as a Zwitter ion?
The hydrocarbon which does decolourise alkaline $KMnO_{4}$ solution and also does not give any precipitate with ammoniacal silver nitrate is
Plexiglass is a commercial name of
The species having tetrahedral shape is
When $H _{2} S$ gas is passed through the $HCl$ containing aqueous solution of $CuCl _{2}, HgCl _{2}$, $BiCl _{3}$ and $CoCl _{2}$, it does not precipitate out
The temperature dependence of rate constant $(k)$ of a chemical reaction is written in terms of Arrhenius equation $k=A e^{-E_{\alpha} / R T}$. Activation energy $\left(E_{a}\right)$ of the reaction can be calculated by ploting
Which one of the following is the true covalent oxide of iodine?
Among the following components of cement which is present in highest amount?
Acetamide and $NaOBr/OH^-$ produce
According to MOT,$ C_2$ molecule has
The number of moles of $ KMnO_{4} $ reduced by one mole of $KI$ in alkaline medium is
Which of the following oxidation states are the most characteristics for lead and tin respectively?
Which of the following polymers is prepared by condensation polymerisation ?