List of top Chemistry Questions

Scattering of light takes place in
The final molarity of a solution made by mixing $50\, mL$ of $0.5\, M \,HCl,\, 150 \,mL$ of $0.25\, M\, HCl$ and water to make the volume $250\, mL$ is
The increase in the value of molar conductivity of acetic acid with dilution is due to
The quantity of electricity required to liberate 0.01 g equivalent of an element at the electrode is
The relative lowering of vapour pressure is equal to the mole fraction of the solute. This law is called
The size of colloidal particles is in between
The solubility of $CO_2$ in water increases with
The solubility product of $AgCl$ is $1.5625 \times 10^{-10}$ at $25 \,^{\circ}C$. Its solubility in grams per litre will be
The solubility product of AgCl is $4.0 \times 10^{-10}$ at 298 K. The solubility of AgCl in 0.04 M $CaCl_2$ will be
The solubility product of $Al_2(SO_4 )_3$ is given by the expression
The solubility product of barium sulphate is $1.5 \times 10^{-9}$ at 18$^\circ$C. Its solubility in water at 18$^\circ$C is
The solutions having same osmotic pressure w.r.t. same semi-permeable membrane are called
The substance A when dissolved in solvent B shows the molecular mass corresponding to $A_3$. The vant Hoff factor will be
The value of Henry?? law constant for some gases at $293\, K$ is given below. Arrange the gases in the increasing order of their solubility. $He : 144.97\, kbar$, $H_2 : 69.16\, kbar$, $N_2 : 76.48 \,kbar$, $O_2 : 34.86\, kbar$
The vapour pressure of a solution (P) and the vapour pressure of the solvent (P$^\circ$) are related to each other as ($x_1$ is the mole fraction of solvent)
The vapour pressures of pure benzene and toluene are 160 and 60 torr respectively. The mole fraction of toluene in vapour phase in contact with equimolar solution of benzene and toluene is
The variance of 20 observations is 5. If each observation is multiplied by 2, then the new variance of the resulting observation is
The volume of 0.1 M $H_2SO_4$ required to neutralise completely 40 mL of 0.2 M NaOH solution is
To a 4 litre of 0.2 M solution of NaOH, 2 litre of 0.5 M NaOH are added. The molarity of resulting solution is
To neutralize completely 20 mL of 0.1M aqueous solution of phosphorus acid $(H_3PO_3)$ the volumeof 0.1 M aqueous KOH solution required is
Vapour pressure of pure water at $298 \,K$ is $23.8 \,mm\, Hg$. $50 \,g$ of urea is dissolved in $850\, g$ of water. The vapour pressure of water for this solution and its relative lowering are respectively.
Volume of 0.1 M HCl required to react completely with 1 g equimolar mixture of $Na_2CO_3$ and $NaHCO_3$ is
What are the conditions for an ideal solution which obeys Raoult?? law over the entire range of concentration?
What is the effect of the addition of sugar on the boiling and freezing points of water ?
What is the freezing point of a solution containing 8.1 g HBr in 100 g water, assuming that the acid to be 90% ionized? $(K_f (H_2O) = 1.86 \,K \,kg\, mol^{-1})$