List of top Chemistry Questions

Arrange the following amines in the decreasing order of basicity:
Ethylamine ${(C2H5NH2)}$ can be obtained from N-ethylphthalimide on treatment with :
An aromatic compound $'A'$ having molecular formula ${C7H6O2}$ on treating with aqueous ammonia and heating forms compound $'B'$. The compound $'B'$ on reaction with molecular bromine and potassium hydroxide provides compound $'C'$ having molecular formula ${C_6H_7N}$. The structure of $'A'$ is :
Which of the following statements about addition polymers is correct?
Each unit of DNA has
Which product is formed, when acetonitrile is hydrolysed partially with cold concentrated HCl
Which among the following cannot react with nitrous acid?
In the Williamsons synthesis for preparation of Williamsons synthesis the compounds used are
Presence of nitro group in a benzene ring
The green flame of organic compound in Beilstein's test indicates presence of
The mechanism involved in the preparation of glycol from 1,2-dihaloethane using aqueous Na2CO3 is
Hydrolysis of diazonium salt produces
Carbocation intermediate is involved in reactions,
The product formed in the reaction \(\text{C}_6\text{H}_5\text{-C}\equiv\text{C-CH}_3\frac{\text{HgSO}_4/\text{H}_2\text{SO}_4}{85^\circ\text{C}}\)
Wooden artifacts and freshly cut tree having 7.6 and 15.2 counts min-1 g -1 of carbon (t1/2 = 5700 years) respectively. Calculate the age of artifact.
The pH of 0.1 M solution of the following salts increases in the order
Molarity of 4.9g of H2SO4 in 250 cm3 solution is
In the phenomenon, in which a substance formed in the course of a reaction itself act as a catalyst is called
On the electrolysis of aqueous solution of Na2SO4, on cathode we get
The binary mixtures having the same composition in liquid and vapour phase and boil at a constant temperature are called
The degree of dissociation of 0.1 M HCN solution is 0.01%. Its ionization constant would be
The hybridization of sulphur in sulphur dioxide is:
What is the mass of 0.5 mole of ozone molecule?
Which parameter always increases during spontaneous change?
If an endothermic reaction is non-spontaneous at freezing point of water and becomes feasible at its boiling point, then