List of top Chemistry Questions

The important ores of tin and lead are
The ideal gas equation connecting pressure (P), volume (V) and absolute temperature (T) is where $k_B$ is the Boltzmann constant and N is the number of molecules.
The ignition mixture in Alumino-thermite process contains a mixture of
The hybrid state of Br in $BrF_5$ is
The hybrid state of C atom in $C_2H_2$ is same as that of carbon in
The hybridisation of sulphur in $SO_2$ is
The general molecular formula of aldehydes and ketones is :
The excluded volume per molecule of a gas is ________ times the actual volume of the gas molecule
The example of heteropolar sol. is
The enthalpies of combustion of carbon and carbon monoxide are -393.5 and -283 $kJ mol^{-1}$ respectively. The enthalpy of formation of carbon monoxide per mole is
The electronic configuration of four atoms are given in brackets: $L\left(1s^{2} 2s^{2} 2p^{1}\right); $ $M\left(1s^{2} 2s^{2} 2p^{5}\right); $ $Q\left(1s^{2} 2s^{2} 2p^{6} 3s^{1}\right); $ $R\left(1s^{2} 2s^{2} 2p^{2}\right);$ The element that would most readily form a diatomic molecule is
The effective atomic number of Fe in $Fe(CO)_5$ is
The edge length of the unit cell of $NaCl$ crystal lattice is 5.623 ?, density is 2.16 $g cm^{-3}$ and the molar mass of $NaCl$ is $58.5\, g$ $mol^{-1}$. The number of moles per unit cell is
The ease of adsorption of the hydrated alkali metal' ions on an ion-exchange resins follows the order:
The ease of liquifiaction of noble gases decreases in the order
The drain cleaner, Drainex contains small bits of aluminium which react with caustic soda to produce dihydrogen. What volume of dihydrogen at 20 ?C and one bar will be released when 0.15 g of aluminium reacts?
The dissolution of $ {Al(OH)_3}$ by a solution of NaOH results in the formation of
The dissociation constants of two acids $HA_1$ and $HA_2$ are $3.0\, \times \, 10^{-4}$ and $1.8\, \times \,10^{-5}$ respectively.The relative strengths of the acids will be
The dispersion medium in Gel is
The dimerisation of $NO_2$ as the temperature is lowered is accompanied by
The dipole moment of $LiH$ is $1.964 \times 10^{-29}$ cm and the interatomic distance between $Li$ and $H$ in this molecule is $1.596\, ?$. The percentage of ionic character in $LiH$ is
The difference in angular momentum associated with the electron in the two successive orbits of hydrogen atom is
The difference between the electrode potentials of two electrodes when no current is drawn through the cell is called________.
The dialysis of colloidal solution depends upon
The diameter of colloidal particles range from :