List of top Chemistry Questions

An aqueous solution of glucose is $10\%$ in strength. The volume in which $1 \,g$ mole of it is dissolved will be
Which compound is highest covalent?
Atomic number of $Cr$ and $Fe$ are respectively $24$ and $26$, which of the following is paramagnetic with the spin of electron :-
Assuming that water vapour is an ideal gas, the internal energy $(?U)$ when 1 mol of water is vapourised at 1 bar pressure and $100^??$, (Given: Molar enthalpy of vapourization of water at 1 bar and $373 \,K = 41\, kJ \,mol^{-1}$ and $R = 8.3\, J \,mol^{-1}K^{-1}$) will be
The position of an element in periodic table after emission of one $\alpha$ - and two $\beta$ - particles remains unchanged. Emission of one $\alpha$ - and two $\beta$ - particles give isotope of the element which acquires same position in periodic table.
: 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
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
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
Which one of the following is the true covalent oxide of iodine?
Among the following components of cement which is present in highest amount?