List of top Chemistry Questions

Which of the following statements about addition polymers is correct?
Each unit of DNA has
In the Williamsons synthesis for preparation of Williamsons synthesis the compounds used are
The green flame of organic compound in Beilstein's test indicates presence of
Presence of nitro group in a benzene ring
The mechanism involved in the preparation of glycol from 1,2-dihaloethane using aqueous Na2CO3 is
Carbocation intermediate is involved in reactions,
Hydrolysis of diazonium salt produces
The product formed in the reaction \(\text{C}_6\text{H}_5\text{-C}\equiv\text{C-CH}_3\frac{\text{HgSO}_4/\text{H}_2\text{SO}_4}{85^\circ\text{C}}\)
On the electrolysis of aqueous solution of Na2SO4, on cathode we get
In the phenomenon, in which a substance formed in the course of a reaction itself act as a catalyst is called
The binary mixtures having the same composition in liquid and vapour phase and boil at a constant temperature are called
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
The degree of dissociation of 0.1 M HCN solution is 0.01%. Its ionization constant would be
The 3s orbital has
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
At constant T and P, which one of the following statements is correct for the reaction.
\(\text{CO}(g) + \frac{1}{2} \text{O}_2 \rightarrow \text{CO}_2(g)?\)
Hydrogen bonding is maximum in
One mole of oxygen gas at STP is equal to
The correct sequence which shows decreasing order of the ionic radii of the elements is