List of top Chemistry Questions

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 liquifiaction of noble gases decreases in the order
The ease of adsorption of the hydrated alkali metal' ions on an ion-exchange resins follows 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 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 dimerisation of $NO_2$ as the temperature is lowered is accompanied by
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 :
The detergent action of soap is due to its
The depression of freezing point is directly proportional to
The density of nitrogen gas prepared from air is slightly greater than that of nitrogen prepared by a chemical reaction from a compound of nitrogen due to the presence of the following in aerial nitrogen
The density of a metal which crystallises in $bcc$ lattice with unit cell edge length $300\,pm$ and molar mass $50 \,g \,mol^{-1}$ will be
The density of neon will be highest at
The density of a cube is measured by measuring its mass and the length of its side. If the maximum errors in the measurement of mass and length are $4\%$ and $3\%$, respectively, then the maximum error in the measurement of the density is
The decomposition of $ {KClO_3}$ to KCl and $ {O_2}$ on heating is an example of
The decomposition of a hydrocarbon follows the equation $k=\left(4.5\times10^{11}s^{-1}\right)e^{-28000 K /T}.$ What will be the value of activation energy?