List of top Chemistry Questions

Which of the following is an aromatic compound?
Which of the following orbital diagram violates Faults exclusion principle?
By which of the following processes, pure nitrogen gas is prepared?
In the following reaction, $C _{2} H _{5} OH + CH _{3} COOH \xrightarrow[- H _{2} O ]{\text { Conc. } H _{2} SO _{4}} CH_3COOC_2H_5 \,\,\,\, C_2H_5OH$ acts as
Which represents the correct order of first ionisation potential of third period elements?
The $C-H$ bond distance is the longest in
$HCl $ molecule contains
Formula of microcosmic salt is
Formation of alcohol by oxymercuration- demercuration of alkenes
Calculate the wavelength (in nanometer) associated with a proton moving at $1.0 \times 10^3ms^{-1}$ (Mass of proton $= 1.67 \times 10^{-27}\, kg$ and $h = 6.63 \times 10^{-34}\, Js$ ) :
The $S-S-S$ bond angle in $S_8$ molecule is $105^{\circ}$. $S_8$ has a V-shape.
Millon?? test is a test for identification of proteins. Millon?? reagent is a solution of mercurous nitrate and mercuric nitrate in nitric acid containing little nitrous acid.
Bleaching powder is a mixed salt. In the presence of $COCl _{2}$, bleaching powder decomposes to give $CaCl _{2}$ and $O _{2}$.
Among the alkali metals, lithium salts exhibit the least electrical conductance in aqueous solutions. Smaller the radius of the hydrated cation, lower is the electrical conductance in aqueous solutions.
A compound with delocalised electrons is more stable than that compound would be if all its electrons were localised. The extra stability, a compound gains as a result of having delocalised electrons, is called delocalisation energy.
$1.575\, g\, H _{2} C _{2} O _{4} \cdot 2 H _{2} O$ in $250 \,mL$ solution makes it $0.1 \,N$. $H _{2} C _{2} O _{4} \cdot 2 H _{2} O$ is a dihydrate organic acid.
Which one of the following impurities present in colloidal solution cannot be remove by electrodialysis?
When propionic acid is treated with aqueous sodium bicarbonate, $ CO_{2}$ is liberated. The $C$ of $ CO_{2}$ comes from
When sucrose is heated with conc. $ HNO_{3},$ the product formed is
Lithium metal crystallizes in a body centred cubic crystal. If the length of the side of the unit cell of lithium is $351\, pm,$ the atomic radius of the lithium will be
Oxidation number of $S$ in $ H_{2}S_{2}O_{8}$ is
For the redox reaction, $Zn + NO _{3}^{-} \longrightarrow Zn ^{2+}+ NH _{4}^{+}$ in basic medium, coefficients of $Zn , NO _{3}^{-}$, and $OH ^{-}$in the balanced equation respectively, are
How many coulombs of electricity are required for reduction of $1$ mole of $ MnO_{4}^{-} $ to $ Mn^{2+}$ ?
Which of the following metal sols cannot be prepared by Bredig's arc metliod?
How many bonds does $B_{2}$ have?