List of top Chemistry Questions

The ore that is concentrated by Froth Floatation process is
In electrophillic aromatic substitution reaction, the nitro group is meta directing because it
A covalent molecule $AB_3$ has pyramidal structure. The number of lone pair and bond pair electrons in the molecule are respectively
Lysine is
In the detection of III group basic radicals, $ {NH4OH}$ is added after $ {NH_4Cl}$ to
In the titration of Mohr's salt against $ {KMnO_4}$ the indicator used is
Electrolysis of brine gives a mixture of
The standard temperature used in thermo- chemical calculations is
In benzene, each carbon atom undergoes
Which of the following is an intensive property?
A reaction is spontaneous at all temperatures when
Highest osmotic pressure is shown by a solution of
The lowering in vapour pressure is maximum for
Tetrahedral structure is formed by
An example of a sulphur containing amino acid is
To dry ammonia gas the drying agent used is
The metal hydroxide which is soluble in excess of ammonium hydroxide is
Horn silver is
50 cc of oxalic acid is oxidized by 25 cc of 0.20 $ { N \, KMnO_4}$. The mass of oxalic acid present in 500 cc of the solution is
50% of a first order reaction is completed in 30 min. The velocity constant of the reaction is
When the same amount of electricity is passed through solutions of silver nitrate and copper sulphate, 0.4 g copper is deposited. The amount of silver deposited is
When phenol is treated with chloromethane in presence of $AlCl_3$ we get
Pure water is neutral because
The ebullioscopic constant is the elevation in boiling point produced by
Which one of the following order is correct for the first ionisation energies of the elements ?