List of top Chemistry Questions

0.0025 has _________ significant figure
A neutral atom (Atomic number > 1) consists of:
The de Broglie wavelengths of electron waves in two orbits is 3:5. The ratio of kinetic energy of electrons will be
Which of the following is atypical element?
The pyknometric density of sodium chloride crystal is 2.165x 103 kg m-3 while its X-ray density is 2.178 x103 kg m-3 . The fraction of the unoccupied sites in sodium chloride crysstal is
The sharp melting point of a crystalline solid is due to
Which of the following species is not paramagnetic?
Which of the following ions does not liberate hydrogen gas on reaction with dilute acids?
Among the following, the essential amino acid is :
Which of the following compounds will show highest dipole moment ?
Which of the following molecules is least resonance stabilized?
Addition of sodium hydroxide solution to a weak acid (HA) results in a buffer of pH 6. If ionisation constant of HA is $10^{-5}$, the ratio of salt to acid concentration in the buffer solution will be :
An ideal gas undergoes isothermal expansion at constant pressure. During the process :
$\Delta U $ is equal to :
At $300\, K$, the density of a certain gaseous molecule at $2$ bar is double to that of dinitrogen $(N_2)$ at $4$ bar. The molar mass of gaseous molecule is :
Among the following, the incorrect statement is :
Identify the monomers from the following.
Chloroethane reacts with X to give diethyl ether. The compound X is
Identify the correct statement.
Which of the following do not contain carbon-oxygen double bonds?
Hydrolysis of cyanohydrin derivative produces
How do you distinguish chlorobenzene A C from benzyl chloride ?
Reaction of acetone with HCN gives
Which of the following electrolytic solutions has the least specific conductance?
58.5 gm of NaCl and 180 gm of glucose were separately dissolved in 1000 ml of water. Identify the correct statement regarding the elevation of boiling point (b.p.) of the resulting solutions.