# Worksheet on Solution

A homogenous mixture composed of only one phase is known as solution. A solute is dissolved in another substance, which is known as solvent. The solvent takes part in dissolving.

Solubility is defined as the ability of a compound to dissolve another compound.  The physical properties of the compound change when another compound is added to it.

Questions:

1. For preparing a litre N / 10 $H_2SO_4$ solution we need $H_2SO_4$

(a)    10 gm

(b)   4.9 gm

(c)    1000 gm

(d)   98 gm

2. A 5 molar $H_2SO_4$ solution is diluted from 1 litre to a volume of 10 litres. Normality of the solution will be:

(a)    5 N

(b)   2 N

(c)    1 N

(d)   10 N

3. The relationship between the osmotic pressures of 0.1 $MKNO_3$  solution $(P_1)$  and $0.1 M CH_3COOH$  solution $(P_2)$  is:

(a) $P_1 > P_2$

(b) $\dfrac{P_1}{P_1 + P_2} = \dfrac{P_2}{P_1 + P_2}$

(c) $P_1 < P_2$

(d) $P_1 = P_2$

4. The molal depression constant of water is $1.86 \text{degree}^{-1}$. 342 g of sucrose $(C_{12} H_{22}O_{11})$  are dissolved in 1000 g water. The freezing point of the solution will be:

(a) $-1.86^0C$

(b) $+1.86^0C$

(c) $+2.4^0C$

(d) $-3.72^C$

5. A solution containing 8.6 g per litre of urea (molecular weigh = 60 ) is isotonic with a 5% solution of an organic non-volatile solute. The molecular weight of the solute is nearly:

(a)    250

(b)   125

(c)    350

(d)   None of these

6. Which of the following will have the highest freezing point at one atmosphere?

(a) $0.1 M BaCl_2$ solution

(b)   0.1 M sugar solution

(c) $0.1 M FeCl_3$ solution

(d)   0.1 M NaC1 solution

7. The solution which will not show abnormal colligative effect is:

(a)    urea in water

(b)   benzoic acid in benzene

(c)    acetic acid in benzene

(d)   Nal1 is water

8. 46 g ethanol and 18 g water are present in a solution.  The mole fraction of each component is:

(a)    0.5, 0.5

(b)   0.75, 0.25

(c)    0.25, 0.75

(d)   None

9. 1000 g aqueous solution of CaCO3 contains 10 g of carbonate. Concentration of the solution is:

(a)    100 ppm

(b)   1000 PPm

(c)    10 ppm

(d)   10000 Ppm

10. When an aqueous solution freezes:

(a)    the solvent and the solute solidify at the same time

(b)    the vapour pressure of the solvent becomes abnormally high

(c)    it is the water what solidifies first

(d)   usually it is the solute that solidifies first

11. Which one of the following pairs will not form an ideal solution?

(a)    2-Methyl propanol and 2—Propanol

(b)   Chloroform and acetone

(c)    Ethylene bromide and propylene bromide

(d)   Benzene and toluene

12. Which of the following conditions is correct for an ideal solution?

(a) $\Delta H_{mix} > 0 \hspace{3mm}\text{and} \hspace{3mm} \Delta S_{mix} > 0$

(b) $\Delta V_{mix} > 0 \hspace{3mm} \text{and} \hspace{3mm} \Delta S_{mix} > 0$

(c) $\Delta V_{mix} > 0 \hspace{3mm}\text{and} \hspace{3mm} \Delta S_{mix} < 0$

(d) $\Delta H_{mix} > 0 \hspace{3mm} \text{and} \hspace{3mm} \Delta V_{mix} > 0$

13. Which of the following pairs of solution is isotonic:

(a)    18% urea and 18% glucose (w/v)

(b)   34.2% sucrose and 60% glucose (w/v)

(c)    6% urea mad 18% fructose (w / v)

(d)   6% urea and 6% glucose (w / v)

14. Among the following, the solution which shows the lowest osmotic pressure is:

(a) $0.10 M NaCl$

(b) $0.03 M FeCl_3$

(c) $0.05 M CaCl_2$

(d) $0.04 M K_3[Fe(CN)_6]$

15. Which of the following is an electrically prepared semipermeable membrane?

(a)    Potassium ferro cyanide

(b)   Calcium phosphate

(c)    Copper ferro cyanide

(d)   Ferrous ferri cyanide

16. The ratio of freezing-point depression values of 0.01 M solutions of urea, common salt and $Na_2SO_4$ are:

(a)    2 : 2 : 3

(b)   1 : 1 : 1

(c)    1 : 2 : 3

(d)   1 : 2 : 1

17. Dry air is passed through to bulbs, one containing a solvent and the other containing the solution. Which one will show a decrease in weight?

(a)    The solvent bulb

(b)   The solution bulb

(c)    Both

(d)   None

18. Which of the following pairs of liquid mixtures does not show negative deviation from Raoult’s law?

(a)    Pyridine and acetic acid

(b)   Acetone and chloroform

(c)    Toluene and acetic acid

(d)   None

19. Red blood cells will undergo crenation if placed in which type of solutions:

(a)    isotonic

(b)   Hypotonic

(c)    Normal

(d)   Hypertonic

20. If mole fraction of the solvent in a solution decreases:

(a)    B.P. increases

(b)   O.P. increases

(c)    V.P. of solution decreases

(d)   All

21. The radiator of a vehicle holds 10 L water. If the vehicle is to be used in Gulmarg where the lowest temperature is $-10.0^oC$. the amount of ethylene glycol (molar mass 62 g) which should be added to the water is:

(a)    3-343 kg

(b)   4-464 kg

(c)    6.696 kg

(d)   2.232 kg

22. Equal amount of which will cause greatest cooling:

(a) $Al_2(SO_4)_3$

(b)   KCN

(c)    KCl

(d)   Glucose

23. What happen when isotonic solution of A (mol. wt. 342) and B (mol. wt. 60) are put into communication through semipermeable membrane?

(a)    Transference of solvent from solution of B to that of A takes place

(b)   Change in temperature of the solutions takes place

(c)    No transference of solvent from solution of A to that of B takes place

(d)   Transference of solvent from solution of A to that of B takes place

24. The observe osmotic pressure of a solution of benzoic acid in benzene is less than its expected value because:

(a)    Benzoic acid molecules are dissociated in benzene

(b)   Benzoic acid molecules are associated in benzene

(c)    Benzoic acid is an organic compound

(d)   Benzoic is a non polar solvent

25. A solution of two liquids having a boiling point lower than either of them:

(a)    Does not show any deviation from Raou1t’s law

(b)   Shows negative deviation from Ra0ult’s law

(c)    Shows positive deviation from Raoult’s law

(d)   Positive and negative deviation from Raoult’s law

1.(b)             2. (c)          3. (a)        4. (a)        5. (c)

6. (b)          7. (a)           8. (b)        9. (d)        10. (c)

11. (b)         12. (b)        13. (c)        14. (a)       15. (c)

16. (c)        17. (a)          18. (b)       19. (d)       20. (d)

21. (a)        22. (b)        23. (c)      24. (d)         25. (a)

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