Question 1 :
Which of the following are homogenous in nature ?<br>(i) Ice<br>(ii) Wood<br>(iii) Soil<br>(iv) Air
Question 2 :
The mole fraction of solute in 10% (w/w) aqueous NaOH solution is:
Question 3 :
$Y$ molal solution of a compound in benzene has mole fraction of solute equal to $0.2$. The value of ?
Question 4 :
The sum of mole fractions of solute and solvent of a solution is equal to:
Question 6 :
The mole fraction of solute in a solution is 0.3 . The mole percent of solvent is:
Question 7 :
The number of components in a binary solution are/is _______ .
Question 8 :
If we take 44g of${ CO }_{ 2 }$and 14g of${ N }_{ 2 }$ , what will be themole fraction of${ CO }_{ 2 }$in the mixture?
Question 9 :
One kilogram of sea water sample contains $6\ mg$ of dissolved $O_{2}$. The concentration of $O_{2}$ in the sample in ppm is:
Question 10 :
In a glass we are having half filled water. Then we are continuously adding salt to the water and salt is getting dissolved into water. But a state occur when water is not able to dissolve salt. Then the solution is called as<b></b>
Question 11 :
The specific gravity of a given $ H_{2}SO_{4}$ solution is $1.76$ A quantity of $3.5 ml$ of the acid is diluted to $1.0 L$ and $25 ml$ of this diluted acid required $25.6 ml$ of $N/10 (f = 095) NaOH $ solution for complete neutralization. The percentage strength (by mass) of the original acid solution is
Question 12 :
Assertion: All homogeneous substances are pure.
Reason: Alloys are homogeneous mixtures of solids.
Question 14 :
If $5.0 \,gm$ of $BaCl_2$ is present in $10^6 \,gm$ solution, the concentration is
Question 15 :
Which mass of solid residue is obtained from the thermal decomposition of $4.10$g of anhydrous calcium nitrate?
Question 16 :
On dissolving sugar in water at room temperature solution feels cool to touch. Under which of the following cases dissolution of sugar will be most rapid?
Question 17 :
Molality of a solution in aqueous medium is $0.8$. Calculate its mole fraction and the percentage by mass of solute if molar mass of solute is $60.$
Question 21 :
1000 g aqueous solution of $CaCO_3$ contains 10 g of calcium carbonate. A concentration of the solution is:
Question 22 :
When $1.04 g$ of $BaCl_2$ is present in $105g$ of solution the concentration of solution is:
Question 23 :
When an ideal binary solution is in equilibrium with its vapour, molar ratio of the two components in the solution and in the vapour phases is
Question 24 :
Maltose is converted to 'A' by Maltase. The mole fraction of 'A' in $10\%$ (w/w) aq. solution is approximately.