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Chemistry

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10. The solution in which the blood cells retain their normal form are with regard to the blood

a. Isotonic b. Isomotic c. Hypertonic d. Equinormal Ans. a Explanation : Isotonic mixtures have equal osmotic pressure so there...

9. If 20 g of a solute was dissolved in 500 mL of water and osmotic pressure of the solution was found to be 600 mmm of Hg at

15° C , then molecular weight of the solute is a. 1000 b. 1200 c. 1400 d. 1800 Ans. b...

8. The average osmotic pressure of human blood is 7.8 bar at

37 ° C . What is the concentration of an aqueous NaCl a. 0.16 mol/L b. 0.32 mol / L...

7. Which of the following colligative properties can provide molar mass of protenis with greater precision

a. Relative lowering of vapour pressure b. Elevation of boiling point c. Depression in freezing point d. Osmotic pressure e....

6. Two solutions A and B are separated by semi- permeable membrane. If liquid flows form A to B then

a. A is less concentrated than B b. A is more same concentration c. Both have same concentratio d. None...

5. Semipermeable membrane is that which permits the passage of

a. Solute molecules only b. Solvent molecules only c. Solute and solvent molecules both d. Neither solute nor solvent molecules...

4. The relationship between osmotic pressure at 273 K when 10g glucose

(P1 ) , 10 g urea (P2 ) and 10g sucrose (P3) are dissolved in 250 mL of water is a. P1...

19. A non ideal solution was prepared by mixing 30 mL chloroform and 50 mL acetone. The volume of mixture will be

a. > 80 mL b. < 80 mL c. = 80 mL d. ≥ 80 mL Ans. b (26)

20. If a 0.1 M solution of glucose and 0.1 molar solution of urea are placed on the two sides of a semipermeable membrane to equal heights, then it will be correct to say

a. There will be no net movement across the membrane b. Glucose will flow across the membrane into urea solution...

6. The system that forms maximum boiling azeotrope is

a. Carbondisulphide – acetone b. Benzene – toluene c. Acetone – chloroform d. n- hexane – n- heptane e. Ethanol...

1. The azetropic mixture of water (b.p.

100° C)  and HCl (b.p. 85° C) boils at 108.5 ° C. When this mixture is distilled it is possible...

22. Assuming ideal behaviour the change enthalpy and volume of mixing of two liquids, respectively are

a. Zero and zero b. +ve and zero c. -ve and zero d. -ve and -ve Ans. a (6)

18. Which one of the following is non-ideal solution

a. Benzene + toluene b. n – hexane + n – heptane c. Ethyl bromide +ethyl iodide d. CCl4  +...

21. When one of the following non- ideal solutions shows the negative deviation

a. CH3  COCH3 + CS2 b. C 6 H 6 + CH3 COCH3 c. CCl4+ CHCl3 d. CH3  COCH + CHCl3 Ans....

2. A solution contains non-volatile solute of molecular mass

Mp . Whih of the following can be used to calculate molecular mass of the solute in terms of osmotic pressure...

11. The mixture that forms maximum boiling azeotrope is

a. Heptane + Octane b. Water + Nitric acid c. Ethanol + water d. Acetone + Carbon disulphide Ans. b...

10. Azeotropic mixture of HCl and water has

a. 84% HCl b. 22.2% HCl c. 63% HCl d. 20.2 % HCl Ans.d Explanation : It is known that...

8. If two liquids A and B form minimum boiling azeotrope at some specific composition then

a. A – B interactions are stronger than those between A – A or B- B b. Vapour pressure of...

22. At temperature

327° C and concentraiton C osmotic pressure of a solution is P, the same solutions at concentration C/2 and a...

24. For an ideal solution, the correct options is

a. Δmix  G = 0 at constant T and P b. Δmix  S = 0 at constant T and P...

3. A liquid mixture boils without changing constituent is called

a. Stable structure complex b. Binary liquid mixture c. Zeotropic liquid mixture d.Azeotropic liquid mixture Ans. d Explanation : Azeotropic ...

1. Osmotic pressure is 0.0821 atm at temperature of 300 K. Find concentration in mole/L

a. 0.033 b. 0.066 c. 0.33 x 10-2 d. 3 Ans. c (11)

9. On the basis of information given below mark the correct option

Information : On adding acetone to methanol some of the hydrogen bonds between methanol molecules break a. At specific composition...

20. When two liquid A and B are mixed then their boiling points becomes greater than of them. What is the nature of this solution

a. Ideal solution b. Positive deviation with non ideal solution c. Negative devitation with non ideal solution d. Normal solution...

6. On the basis of information given below mark the correct option

Information : i. In bromoethane and chloro ethane mixture inter-molecular interaction of A – A and B- B type are...

7. Which of the following liquid pairs shows a positive deviation from Raoult’s law

a. Water-nitric acid b. Benzene- method c. Water-hydrochloric acid d. Acetone chloroform Ans. b (10)

15. Which one is not equal to zero for an ideal solution

a.  ΔS mix b. ΔV mix c ΔP = PObserved      – P Raoult d. ΔH mix Answer : a...

14. Which of the following is not for ideal solution

a. ΔS mix    = 0 b. ΔH mix  = 0 c. It obeys Raoult’s law d.  ΔV mix   = 0 ANSWER...

13. Liquids A and B form and ideal solution

a. The enthalpy of mixing is zero b. The entropy of mixing is zero c. The free energy of mixing...

12. Which property is shown by an ideal solution

a. It follows Raoult’s law b.  ΔHmix  = 0 c.  Δ Vmix  = 0 d.  All of these ANSWER :...

11. All form ideal solution except

a.  C2 H5 Br and C2 H5 I b.  C6 H5 Cl  and C6  H5Br c.  C6 H6  and  C6...

10. Which of the following does not show negative deviation from Raoult’s law

a. Acetone-Chloroform b. Acetone Benzene c. Chloroform Ether d. Chloroform Benzene ANSWER : B (48)

9. Which of the following does not show positive deviation from Raoult’s law

a. Benzene- Chloroform b. Benzene Acetone c. Benzene Ethanol d.Benzene Carbon tetrachloride ANSWER : A Explanation : Benzene  chloroform solution...

8. Identify the mixture that shows positive deviation from Raoult’s law a

a. CHCl3  + (CH3 )2  CO b. (CH3 )2  CO +  C6 H5 NH2 c. CHCl3  + C6 H6 d.(CH3 )2 ...

5. Considering the formation breaking and strength of hydrogen bond, predict which of the following mixtures will show a positive deviation from Raoult’s law

a. Methanol and acetone b. Chloroform and acetone c.Nitric acid and water d. Phenol and aniline ANSWER . A Explanation...

4. One component of a solution follows Raoult ‘s law over the entire range 0

≤ x1 ≤ 1. The second component must follow Raoult’s law in the range when x2  is a. Close to...

3. A binary liquid solution is prepared by mixing n-heptane and ethanol. Which one of the following statements is correct regarding the behaviour of the solution

a. The solution formed is an ideal solution b. The solution is non-ideal showing +ve  deviation from Raoult’s Law c....

2. A solution of acetone in ethanol

a. Behaves like a near ideal solutions b. Obeys Raoult’s law c. Shows a negative deviation from Raoult’s   law d....

1. A solution with negative deviation among the following is

a. Ethanol- Acetone b. Chlorobenzene- Bromobenzene c. Chloroform- Acetone d. Benzene Toluene ANSWER . C Explanation : Due to hydrogen...

54. At room temperature a dilute solution of urea is prepared by dissolving 0.60 g of urea in 360g of water. If the vapour pressure of pure water at this temperature is 35mmHg, lowering of vapour pressure will be

a. 0.027 mmHg b. 0.028 mmHg c. 0.017mmHg d. 0.031 mmHg Ans. c (65)
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