Chemistry Grade 11 Final Exam

I. Write true if the statement is correct or false if it is incorrect on the separate answer sheet
provided.

1. There is no difference between soaps and detergents
2. For exothermic reactions the yield of products is increased by performing the reaction at lower
   temperature
3. Removing the products from the reaction vessel shifts the reaction in the forward direction
4. It is not possible to prepare esters in the laboratory.
5. vapour pressure is the pressure exerted by vapour of liquid at a given temperature
   II. Match the items in column „A‟ with the items in column „B‟.
   Column “A” Column “B”
6. Soaps
   A. – C –
7. Carboxyl group
8. Detergents B. – C – O –
9. Ester group C. – C – OH
10. Carbonyl group D. R – C – E. R – S –

III. Choose the correct answer from the given alternatives.

2. When “Tella” is kept open for some time, it becomes sour due to the formation of
   A. Methanoic acid B. benzoic acid C. ethanoic acid D. tolune
3. For the reactions A B and B A, the rate constants are 8×102
   S
   -1
   and 5.2 x 104
   S
   -1
   respectively.
   What is the value of the equilibrium constant for the equilibrium A B?
   A. 1.54 x 10-3 B. 1.54 x 10-2 C. 6.5 x 10-3 D. 6.5 x 10-2
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   Full Name ________________ Grade – 11 Section 4th
   Quarter Final Exam
   Subject – Chemistry Year: 2012 E.C Exam. Room: Time allowed: 1:30
   C – OCH2CH3
   CH3 – CH2 – C – OCH3 + NaOH
4. Fats and oils belong to a class of biomolecules called
   A. proteins B. carbohydrates C. lipids D. organic acids
5. The value of the equilibrium constant changes with
   A. pressure C. Temperature
   B. concentration of the reactant D. Catalyst
6. At a certain temperature for the reaction 2NO(g) + O2(g) 2NO2(q), the equilibrium concentrations are
   [ ] [
   ] [
   ] What is the value of Kc at this temperature
   A. 00.063 B. 0.50 C. 1.4 D. 2.0
7. If the equilibrium constant for reaction 2NO(g) N2(g) + O2(g) is Kc = 3.6 x 103
   at 275k, then what
   will be the value of Kc for the reaction N2(g) + O2(g) 2NO(g)?
   A. 2.70 x 10-4 B. 2.70 x 104 C. 12.96 x 104 D. 3.60 x 103
8. At 9500
   c, Kc = 0.0108 for the reaction
   CaCO3(s) CaO(s) + CO2(g). A mixture of 25g CaCO3, 25g CaO and 15g CO2 is placed in a 10
   vessel at 9500
   c. What will happen to the amount of CaCO3 at equilibrium?
   A. It will increases B. It will decreases C. It will remain the same D. None
9. The organic compound CH3COCH3 is
   A. aldehyde B. ester C. carbonyl D. ketone
10. What is the name of the following compound?
    A. Benzoate ester B. Ethyl benzoate C. Phenyl butyrate D. Ethyl benzyl ketone
11. What is the name of a base-promoted ester hydrolysis reaction?
    A. Acylation B. Esterification C. Condensation D. Saponification
12. Consider the reaction
    What is the product of this reaction?
    A. Sodium acetate and ethanol
    B. Sodium acetate and methanol
    C. Sodium propionate and methanol
    D. Methyl propionic acid and methanol
13. Which of the following does not contain oxygen?
    A. Methane B. Methanol C. Methanoic acid D. Methanal
14. The conversion of ester in to alcohol and carboxylic acid is
    A. Esterification B. Saponification C. Dehydration D. Hydrolysis
15. A chemical name for aspirin is
    A. acetyl salicylic acid C. methyl salicylate
    B. salicylic acid D. Sodium salicylate
16. The IUPAC name of (CH3)3 CCH2COOH is
    A. 3, 3-dimethyl butanoic acid C. Hexanoic acid
    B. 3 –methyl pentanoic acid D. 2, 3 –dimethyl butanoic acid
17. Which of the following is the most acidic compound?
    A. CH3OH B. (CH3)3COH C. CH3COOH D. C2H5OH
    O
    O
18. For the gaseous reaction,
    PA + qB qC + PD which of the following relationships is true?
    A. Kp = kc C. Kp = Kc (RT)p-q
    B. Kp = Kc(RT)p+q D. Kp = Kc = (RT)p+q
19. If the gas mixture for the reaction
    N2O4(g) 2NO(g) is compressed, then
    A. Products are favoured C. No change
    B. Reactants are favoured D. Product concentration become equal to reactants
20. one of the important methods for preparation of carboxylic acid is
    A. oxidation B. hydration C. hydrogenation D. neutralization
21. Ethyl ethanoate is formed from
    A. ethanol and ethanoic acid C. ethanol and methanoic acid
    B. ethanol and methanol D. Propanol and methanol
22. Sodium and potassium salts of long chain fatty acids are called
    A. Detergent B. Baking Soda C. Chile salt peter D. Soap
23. Which of the following statements describe a system that is at equilibrium?
    A. The rate constants for the forward and reverse reactions are equal.
    B. The concentrations of reactants and products are equal.
    C. The reaction ceases.
    D. The forward and reverse rates are equal.
24. The equilibrium constant for reaction (1) is k. What is the equilibrium constant for the reaction (2)?
    SO2(g) + O2(g) SO3(g) — (1)
    2SO3(g) 2SO2(g) + O2(g) —- (2)
    A. k
    2 B. 2k C.

D.

25. The equilibrium constant for the following reaction 3H2(g) + CO(g) CH4(g) + H2O(g) is 3.93 at
    1200k. A system at equilibrium has [ ] = 0.1522M, [
    ] = 0.1566M and [ ] = 0.0478M. What is
    the value of [
    ]?
    A. 0.0421 B. 0.0452 C. 0. 0481 D. 0.0510
26. Which one of the following organic molecules has the highest water solubility?
    A. HOOCCH2 COOH C. HOOCCH2CH2COOH
    B. CH3CH2CH2COOH D. CH3CH2CH2CH2COOH
27. Which catalyst is used in the hydrogenation of vegetable oils?
    A. Iron B. Nickel C. Platinum D. molybdenum
28. An alcohol produced in the manufacture of soap is
    A. glycerol B. butanol C. ethanol D. methanol
29. The degree of freedom of water at its triple point is
    A. 0 B. 1 C. 2 D. 3
30. pleasant smelling is the characteristics of
    A. Alcohols B. aldehydes C. carboxylic acids D. esters
    IV. Work out
31. By what process is margarine prepared from oils?
32. Describe the number of components present in the following systems.
    a) solution of sugar in water
    b) a mixture of benzene and water
33. Given Pcl5a(g) PCl3(g) + Cl2(g), = +92KJ how will each of the following influence the
    system at equilibrium?
    a) Increasing temperature C. Increasing concentration of PCl5
    b) increasing pressure D. adding a catalyst
34. write the molecular formula for a saturated monocarboxylic acid having six carbon atoms
35. CH3 – CH2 – OH X. What is x?
36. At a certain temperature, Kc = 4.13 x 10-2
    for the equilibrium, 2IBr(g) I2(g) + Br2(g)
    a) What are the concentrations of I2 and Br2 in equilibrium with 0.0124M of IBr?
    b) what was the initial concentration of IBr before equilibrium was established?
37. the following equilibrium constants were determined at 1123k
    C(s) + CO2(g) 2CO(g), Kc = 1.4 x 1012
    CO(g) + Cl2(g) COCl(g), Kc = 5.5 x 10-1
    calculate the equilibrium constant at this temperature for the reaction
    C(s) + CO(g) + 2Cl2(g) 2COCl2(g)
38. For the reaction a(g) + B(s) C(g) + D(g), Kc = 49 at 1270
    c. Calculate Kp for this reaction.
39. what is the correct IUPAC name for
40. The common name of
    CH3 – C – CH – CH2 – C – OH
    CH3 O
    CH2 CH3
    CH3
    COOH
    COOH, is