List of top Chemistry Questions

10 g of glucose are dissolved in 150 g of water. The mass % of glucose is

12 g of urea is dissolved in 1 L of water and 68.4 g of sucrose is dissolved in 1 L of water. The lowering of vapour pressure of urea is

25 mL of a solution of barium hydroxide on titration with a 0.1 molar solution of hydrochloric acid gave a titre value of 35 mL. The molarity of barium hydroxide solution was

$250\, mL$ of sodium carbonate solution contains $2.65\, g$ of $Na_2CO_3$. If $10\, mL$ of this solution is diluted to $500\, mL$, the concentration of the diluted acid will be

45 g of ethylene glycol $(C_2H_6O_2)$ is mixed with 600 g of water. The freezing point of the solution is ($K_f$ for water is $1.86\, K\, kg\, mol^{-1}$)

$75.2\, g$ of phenol is dissolved in a solvent of $K_f = 14$. If the depression in freezing point is $7 \,K$ then find the $\cdot %$ of phenol that dimerises.

A 1 % aqueous solution (M/V) of a certain substance is isotonic with a 3 % solution of glucose (M. Mass 180). The molar mass of the substance is

$A \,5\%$ solution of cane sugar $(M.W. = 342)$ is isotonic with $1\%$ solution of substance $X$. The molecular weight of $X$ is

A 5% solution of glucose (molar mass 180) is isotonic with a 2.5% solution of substance X at the same temperature. The molar mass of X is

A mixture contains 1 mol of volatile liquid A (p$^\circ$A= 100 mmHg) and 3 moles of volatile liquid B (p$^\circ$b = 80 mmHg). If solution is ideally behaved, total vapour pressure of distillate is (approx)

A non-volatile electrolyte dissolved in an aqueous solution in same molal proportion as non-electrolyte produces

$A$ plant cell shrinks when it is kept in a

A real solution is that which :

A solid AB has rock salt structure. If the edge length is 520 pm and radius $A^+$ is 80 pm ; theradius of anion $B^-$ would be

A solution containing 6.8 g of non-ionic solute in 100 g of water was found to freeze at -0.93 $^\circ$C.$K_f$ for water is 1.86, If the mol. mass of solute is

A solution is obtained by mixing $200\, g$ of $30\%$ and $300\, g$ of $20\%$ solution by weight. What is the percentage of solute in the final solution?

According to Boyle-Vant Hoff law for solutions, the osmotic pressure of a dilute solution is

An aqueous solution of $2\%$ non-volatile solute exerts a pressure of $1.004$ bar at the normal boiling point of the solvent. What is the molecular mass of the solute?

An aqueous solution of an electrolyte AB has b.pt.of 101.08$^\circ$C. The solute is 100% ionised at b.pt.of water. The f.pt. of the same solution is $-1 -80 ^\circ C. AB (K_bI/K_f = 0.3)$

An aqueous solution of glucose was prepared by dissolving 18 g of glucose in 90 g of water. The relative lowering in vapour pressure is

An aqueous solution of methanol in water has vapour pressure

An aqueous solution of non-electrolyte 'A' with molecular mass $60$ contains $6\,g$ in $500\, mL$ and has a density equal to $1.05 \,g \,mL^{-1}$. The molalityof solution is

An ideal solution was obtained by mixing methanoland ethanol. If the partial vapour pressure of methanol and ethanol are 2.619 k Pa and 4.556 k the composition of vapour(in terms of mole fraction) will be

Aquatic species are more comfortable in warm waters than cold waters. $K_H$ values for both $N_2$ and $O_2$ decrease with increase of temperature.

At equilibrium, vapour phase will be always rich in component which is more volatile. The composition of vapour phase in equilibrium with the solution is determined by the partial pressures of the components.