Mock Exams Chemistry SS 3
CHEMISTRY
1. The structure of 1,2,3-trichloro-2-methyl butane is
1. a) CH3 H H H b) Cl Cl Cl H
2. H- C – C – C – C – H H- C – C – C – C – H
3. ClCl H HClClCl H
4. c) ClClCl H d) H HHH
5. H – C- C- C – C – H H – C – C – C- C – H
6. H H – C- H HH HHH
i. H – C- H
ii. H H
3. Which of these compounds exhibits resonance ?
(a) Ethanol (b) Ethane (c) Benzene (d) Ethyne.
4. The solubility of alkane in organic solvent is due to presence of its
(a) polar molecule (b) non-polar molecule (c) Low melting points (d) low freezing points.
5. Which of these is alkane member?
(a) Ethene (b) Pecane (c )Propyne (d) Butanol
6. The root in the organic compound below is:
1. H HH
2. H- C – C – C – H
7. H H OH.
(a) Propane (b) Propan-1-ol (c ) Propanol (d) hydrogen
8. The name of the organic compound with the structure below:
1. CH3 H
9. C = C
1. H CH3
10. Cis- but-2-ene
11. Trans –cis-but-2-ene
12. Trans-1-2- but-2-ene
13. 1,2- dimethyl ethane.
1. In the reaction given below:
2. C2H5OH Conc H SO4 C2 H4Conc H2SO4is acting as
-H2O
A. oxidizing agent B reducing agent C. Dehydrating agent D. Drying agent.
14. One of the following is not a chemical property of ethane.
(a ) Polymerization (b) Substitutional (c ) Hydration (d) Addition.
15. Function of the empty bottle during the preparation of ethane gas is
(a) to remove oxygen (b) to remove CO2 ( c) to prevent sucking back of the gas
(d) None of the above.
16. Additional reaction of hydrogen and ethene is known as
(a) polymerization (b) additional (c) combustion (d) hydrogenation
17. The concentration of hydrogen ion in a neutral solution is
(a) 10-6 moldm-3( b) 10-7moldm-3 (c) 5 x 10-7 moldm-3 (d) 1 x 10-8mol dm-3
18. Hydrogen can be prepared in a large scale using the
(a) Harber’s process (b) Down’s process (c ) Bosh Process (d) Contact Process.
19. Which of the following hydrocarbons is alkyne?
1. (a ) C2H4 (b) C2H6 (c) C2H2 (d) C3H8
20. The final product of complete reaction between ethyne and hydrogen gas is
1. (a) ethane (b)methyl ethane ( c) ethane ( d) hydroethyne
21. Ethynepolymerises in the presence of organomickelcomplext as catalyst to form
1. (a) polythene (b) benzene ( c) polythene (d) methyl benzene.
22. Which of the following is the structure of benzene
23. Benzene can be prepared from the following except
1. (a) Coal tar (b) petroleum ( c) Alkanol (d) Ethyne
24. Benzene can undergo additional reaction due to presence of
1. (a) double bonds (b) single bonds ( c) hydrogen ( d) carbon.
25. Benzene undergoes the following reaction except.
1. (a) substitution(b) addiction ( c) Hydrogenation ( d) polymerization
26. The technique used in separating a mixture of common salt and water is
1. (a) evaporation(b) sublimation(c) decantation (d) chromatography.
1. The functional groups of the alkanol is
2. A. CnH2n + 1 OH B. carboxylic group C. hydroxyl group D. CnH2n+ 2
27. 2. Primary alkanols are oxidized to carbonylic acid, secondary alkanols are oxidized to alkanones while tertiary alkanols are A. oxidized to alkanols B. oxidized to alkanones
C. not oxidized D. oxidized to alkene
28. The soluble of alkanols in water is due to
A. the covalent nature B. hydrogen bonding C. their low melting point
D. their low melting point
29. When acidified KMnO4 is used as oxidizing agent for alkanol, the colour change observed is
A. yellow to red B. purple to colourless C. orange to green D. white to black
30. Which of the following enzymes converts glucose to ethanol?
A. maltose B. zymase C. diastase D. amylase
31. The name of (CH3)2 CHCOOH is
A. Propane acid B. 2-methylhutanoic acid C. Dimethyl butanoic acid
E. Propanoic acid
32. Citric acid appears in unripe orange while enthanwie acid appears in
1. A. Unripe pawpaw B. Carrot C. Vineger D. Rice
33. Esters are employed in the following except.
1. A. Making perfumes B. Making cement C. Nail varnishes D. Making yeast
34. An alkanoic acid reacts reversibly with an alkanol to produce.
1. A. a salt B. an ester C. a sugar D. an alkene
35. Ethan-1, 2-dioe acid is
1. A. a mineral acid B. dicarboxylic acid C. citric acid D. a soap
36. The structure of soap according to suponification process is
1. A. CH3(CH2)16COONa B. CH3CH2COOCa C. CH3CH2CH2COONa
1. D. C2H5COONa
37. 2 . The example of soapless detergent is
1. A. alkyl B. ethylethanoate C. alkanol D. alkylbenzenesulphonates
38. Hydrophobic tail of soap dissolves in grease while hydrophilic dissolves in
1. A. benzene B. water C. propanol D. kerosene
39. Fats and oils belong to a general group of compounds known as ………..
1. A. glycerol B. soap C. margarine D. lipids
40. Hydrolysis of fat and oil to yield alkanol and soap is called …………
1. A. esterification B. hydrogenation C. hydrolysis D. saponification
41. The following are examples of small molecules based during polymerization process.
A. acid B. HCl C.H2O D. NH3
42. Polymerisation of ethane produces ……………
A. Perspex B. isoprene C. polythene D. ammonia
43. Bakelite is a good example of …………..
A. natural rubber B. thermoset C. thermoplastic D. additional polymerization
44. Starch and cellulose are good examples of …………
A. polythene B. natural polymer C. synthetic polymer D. food
45. Joining together of smaller molecules to form a giant molecule is called ………..
process. A. hydrogenation B. saponification C. esterification D. polymerization
46. One of the following is not a monosaccharide
1. A. glucose B. maltose C. fructose D. maltose
47. The product obtained when sucrose is treated with dil. HCI are
1. A. glucose and galatose B. fructose and galatose C. glucose and fructose D. glucose
48. Which of the following is a reducing sugar?
1. A. fructose B. glucose C. sucrose D. ribose
49. Which one of these substances is not a polysaccaharides?
1. A. lactose B. starch C. cellulose D. mannose
50. Few drops of conc HNO3 is added to a solution and an intense yellow colour is obtained, then the solution contained.
1. A. proteins B. carbohydrates C. fat D. oil
THEORY
1. Explain a laboratory test for proteins. 2a. What are carbohydrates?
b. Name the component monosaccaharide of
(i) sucrose (ii) maltose.
THEORY
1 (a) What are the conditions necessary for polymerization.
(b) List two types of polymerization.
2 (a) Write an equation for the preparation of polythene from ethane.
(b) What are the monomer present in the following:
– polythene
– polyvinyl/chloride
– polytetrafluoro ethane
– polypropene
THEORY
1. Explain the structure of soapless detergent and its mode of action.
2. Explain the following;
(a) saponification (b) hydrogenation THEORY
1a. Give the formula of ethanoic acid and indicate its functional group.
b. Ethanoic acid reacts with both sodium hydroxide and ethanol, suing equations to comparethe reactions and classify the products.
2a. Ethylethanoate reacts with both water and alkali; using equation to compare the reaction.
b. What happens when ethanoic acid is heated strongly with soda-line.
THEORY
1(a) Write the structural formula of two named secondary alkanols.
(b) Explain the structural difference between primary and tertiary alkanols. 2(a) What is fermentation?
(b) Describe the preparation of ethanol from table sugar. THEORY
1. a. State two (2) uses of Benzene
b. identify two (2) physical properties of benzene.
2. a. How would you prepare benzene?
b. State two (2) chemical properties of benzene.
THEORY
1. a. Calculate the H+ of a solution whose PH is 5.
b. State three (3) uses of ethyne
2. a. With the aid of labeled diagram, describe the laboratory preparation of ethyne.
b. Give a chemical test to distinguish between ethane and ethyne. THEORY
1. Describe two (2) methods of obtaining ethene industrially.
2a. Write and name the geometric isomers of compound with the molecular formular C5H10
b. With chemical equation only, show how ethane reacts with the following:
– ozone
– oxygen
– alkaline KMnO4
– Conc. H2SO4
THEORY
1. Write briefly on the following:
a. Cracking
b. Isomerism
c. Homologous Series
d. Stereo Isomerism
e. Optical Isomerism.
2. Name the following compound
i. CH2(OH)CH(OH)CH2OH
ii. C2H4CL2
