List of top Chemistry Questions

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 \(\text{C}_6\text{H}_5\text{-C}\equiv\text{C-CH}_3\frac{\text{HgSO}_4/\text{H}_2\text{SO}_4}{85^\circ\text{C}}\)
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
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 binary mixtures having the same composition in liquid and vapour phase and boil at a constant temperature are called
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 pH of 0.1 M solution of the following salts increases in the order
At constant T and P, which one of the following statements is correct for the reaction.
\(\text{CO}(g) + \frac{1}{2} \text{O}_2 \rightarrow \text{CO}_2(g)?\)
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
The 3s orbital has
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
The hybridization of NH3 and NO2-
Mean distance between atoms in the range of
The nature of positive rays depends on
IUPAC name of element having atomic number 108 is