{"id":40,"date":"2023-04-01T12:20:50","date_gmt":"2023-04-01T12:20:50","guid":{"rendered":"http:\/\/localhost\/solvefor2\/?p=40"},"modified":"2023-04-01T12:07:40","modified_gmt":"2023-04-01T12:07:40","slug":"chemistry-1-form-four-mock-examination-madaba-district-council","status":"publish","type":"post","link":"https:\/\/edu.co.tz\/notes\/chemistry-1-form-four-mock-examination-madaba-district-council\/","title":{"rendered":"CHEMISTRY 1 FORM FOUR MOCK EXAMINATION, MADABA DISTRICT COUNCIL"},"content":{"rendered":"

\n\u00a0<\/p>\n

THE PRESIDENT’S OFFICE
\n<\/strong><\/span><\/p>\n

REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT
\n<\/strong><\/span><\/p>\n

MADABA DISTRICT COUNCIL
\n<\/strong><\/span><\/p>\n

DISTRICT MOCK EXAMINATION
\n<\/strong><\/span><\/p>\n

032\/1 CHEMISTRY 1 FORM FOUR
\n<\/strong><\/span><\/p>\n

TIME 03:00 HOURS 22 JUNE 2021
\n<\/strong><\/span><\/p>\n

\n\u00a0<\/p>\n

\n\u00a0<\/p>\n

INSTRUCTONS
\n<\/strong><\/span><\/p>\n

    \n
  1. This paper consists of section A, B and C.
    \n<\/span><\/li>\n
  2. Answer all<\/strong> questions in all sections.
    \n<\/span><\/li>\n
  3. Calculators and cellular phones are not allowed in the examination room.
    \n<\/span><\/li>\n
  4. Write your examination number on every page of your answer booklets\/sheets.
    \n<\/span><\/li>\n
  5. The following constants may be used,
    \n<\/span><\/li>\n<\/ol>\n
      \n
    • LA = 6.-2 X 1023<\/sup>
      \n\t\t\t<\/span><\/li>\n
    • GMV = 22.4dm3<\/sup> at S.T.P
      \n<\/span><\/li>\n
    • 1Llitre = 1dm3 <\/sup>= 1000cm3<\/sup>
      \n\t\t\t<\/span><\/li>\n
    • \n
      IF = 96500 coulombs
      \n<\/span><\/div>\n

      Atomic masses
      \n<\/span><\/p>\n

      Na = 23. H =1, C = 12, O = 16, S = 32
      \n<\/span><\/p>\n

      \n\u00a0<\/p>\n

      SECTION A (15 marks)
      \n<\/strong><\/span><\/p>\n<\/li>\n<\/ul>\n

        \n
      1. \n
        For each of the item (i) \u2013 (x) choose the correct answer from the given alternatives and write its letter beside the item number in the answer book provided
        \n<\/span><\/div>\n
          \n
        1. \n
          Which one of the following sects of laboratory apparatus are used for measuring volume?
          \n<\/span><\/div>\n
            \n
          1. Crucible, U-tube and volumetric flask
            \n<\/span><\/li>\n
          2. Test tubes, beakers, and glass jar
            \n<\/span><\/li>\n
          3. Thistle funnel, separating funnel and beaker
            \n<\/span><\/li>\n
          4. Burette, pipette and measuring cylinder
            \n<\/span><\/li>\n
          5. Conical flask, test tube and measuring cylinder
            \n<\/span><\/li>\n<\/ol>\n<\/li>\n
          6. \n
            The empirical formula of certain compound is CH3<\/sub>. Its molar mass is 30g.<\/sub> What will be its molecular formula?
            \n<\/span><\/div>\n
              \n
            1. CH4<\/sub>
              \n\t\t\t\t\t\t\t<\/span><\/li>\n
            2. C2<\/sub> H4<\/sub>
              \n\t\t\t\t\t\t\t<\/span><\/li>\n
            3. C2<\/sub> H6<\/sub>
              \n\t\t\t\t\t\t\t<\/span><\/li>\n
            4. C2<\/sub> H8<\/sub>
              \n\t\t\t\t\t\t\t<\/span><\/li>\n
            5. C4<\/sub> H12<\/sub>
              \n\t\t\t\t\t\t\t<\/span><\/li>\n<\/ol>\n<\/li>\n
            6. \n
              Fractional distillation process of a mixture of water and ethanol is possible because:
              \n<\/span><\/div>\n
                \n
              1. Water and ethanol have the same boiling point
                \n<\/span><\/li>\n
              2. Water has lower boiling point than ethanol
                \n<\/span><\/li>\n
              3. \n
                Ethanol has lower boiling point than water
                \n<\/span><\/div>\n<\/li>\n
              4. \n
                Water and ethanol form partially immiscible liquid solution
                \n<\/span><\/div>\n<\/li>\n
              5. \n
                Water and ethanol are immiscible liquids
                \n<\/span><\/div>\n<\/li>\n<\/ol>\n<\/li>\n
              6. \n
                Which of the following substances represent a group of acidic oxides?
                \n<\/span><\/div>\n
                  \n
                1. \n
                  Carbon dioxide carbon monoxide, and Sulphur dioxide
                  \n<\/span><\/div>\n<\/li>\n
                2. Sulphur trioxide, nitrogen dioxide and nitrogen monoxide
                  \n<\/span><\/li>\n
                3. Carbon dioxide, Sulphur dioxide and do nitrogen oxide
                  \n<\/span><\/li>\n
                4. Sulphur trioxide, carbon dioxide and nitrogen dioxide
                  \n<\/span><\/li>\n
                5. Carbon monoxide, nitrogen oxide and Sulphur dioxide
                  \n<\/span><\/li>\n<\/ol>\n<\/li>\n
                6. \n
                  What will be the molarity of a solution which contain 26.5g of anhydrous sodium carbonate in 2dm3<\/sup> of solution
                  \n<\/span><\/div>\n
                    \n
                  1. 0.05M
                    \n<\/span><\/li>\n
                  2. 0.25M
                    \n<\/span><\/li>\n
                  3. 5.30M
                    \n<\/span><\/li>\n
                  4. 0.025M
                    \n<\/span><\/li>\n
                  5. 0.50M
                    \n<\/span><\/li>\n<\/ol>\n<\/li>\n
                  6. \n
                    The Brownian movement is taken to be the evidence of the
                    \n<\/span><\/div>\n
                      \n
                    1. Theory of association of water molecules
                      \n<\/span><\/li>\n
                    2. Theory of ionization of electrolytes
                      \n<\/span><\/li>\n
                    3. Theory of colloidal suspensions
                      \n<\/span><\/li>\n
                    4. Kinetic theory of behavior of substances
                      \n<\/span><\/li>\n
                    5. Brownian theory
                      \n<\/span><\/li>\n<\/ol>\n<\/li>\n
                    6. \n
                      One of the isotopes of an element X has an atomic number “Z” and a mass number A. What is the number of neutrons contained in the nucleus of the element X?
                      \n<\/span><\/div>\n
                        \n
                      1. Z
                        \n<\/span><\/li>\n
                      2. A
                        \n<\/span><\/li>\n
                      3. A + Z
                        \n<\/span><\/li>\n
                      4. A \u2013 Z
                        \n<\/span><\/li>\n
                      5. Z \u2013 A
                        \n<\/span><\/li>\n<\/ol>\n<\/li>\n
                      6. \n
                        C3<\/sub> H5<\/sub>Cl can be represented in different structures which are called
                        \n<\/span><\/div>\n
                          \n
                        1. Homologues series
                          \n<\/span><\/li>\n
                        2. Isomers
                          \n<\/span><\/li>\n
                        3. Structural formulae
                          \n<\/span><\/li>\n
                        4. Identical structures
                          \n<\/span><\/li>\n
                        5. Condensed structures
                          \n<\/span><\/li>\n<\/ol>\n<\/li>\n
                        6. \n
                          \u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026.is the general term used to explain a mixture of different metals
                          \n<\/span><\/div>\n
                            \n
                          1. Alloy
                            \n<\/span><\/li>\n
                          2. Allotrope
                            \n<\/span><\/li>\n
                          3. Amphoteric
                            \n<\/span><\/li>\n
                          4. Amorphous
                            \n<\/span><\/li>\n
                          5. Isotope
                            \n<\/span><\/li>\n<\/ol>\n<\/li>\n
                          6. \n
                            A student whose hands are spilled out by acid in the laboratory should\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026\u2026. as first Aid
                            \n<\/span><\/div>\n
                              \n
                            1. Rinse the affected area by dilute acid
                              \n<\/span><\/li>\n
                            2. Rinse the affected area by a piece of cloth or cotton wool
                              \n<\/span><\/li>\n
                            3. Wash the affected area by strong base
                              \n<\/span><\/li>\n
                            4. Wash the affected area by running water
                              \n<\/span><\/li>\n
                            5. \n
                              Wash the affected area by concentrated HCl
                              \n<\/span><\/div>\n

                              \n\u00a0<\/p>\n<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<\/li>\n

                            6. Match the item in LIST “A” with the correct response in list “B”
                              \n<\/span><\/li>\n<\/ol>\n
                              \n\n\n\n<\/colgroup>\n\n\n\n
                              \n

                              LIST A<\/strong><\/span><\/p>\n<\/td>\n

                              		\n

                              LIST B<\/strong><\/span><\/p>\n<\/td>\n<\/tr>\n

                              \n
                                \n
                              1. Lightest element
                                \n<\/span><\/li>\n
                              2. An element of group (VII) of the periodic table
                                \n<\/span><\/li>\n
                              3. Source of energy derived from animal wastes
                                \n<\/span><\/li>\n
                              4. Form about 78% by volume of air
                                \n<\/span><\/li>\n
                              5. The lightest noble gas<\/span><\/li>\n<\/ol>\n<\/td>\n
                              		\n
                                \n
                              1. Argon
                                \n<\/span><\/li>\n
                              2. Helium
                                \n<\/span><\/li>\n
                              3. Hydrogen
                                \n<\/span><\/li>\n
                              4. Iodine
                                \n<\/span><\/li>\n
                              5. Bio gas
                                \n<\/span><\/li>\n
                              6. Biomass
                                \n<\/span><\/li>\n
                              7. Nitrogen
                                \n<\/span><\/li>\n
                              8. oxygen<\/span><\/li>\n<\/ol>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

                                \n\u00a0<\/p>\n


                                \n\t\t\tSECTION B (70 marks)
                                \n<\/strong><\/span><\/p>\n

                                  \n
                                1. \n
                                  (a) Explain with the help of one chemical equation in each case, how
                                  \n<\/span><\/div>\n
                                    \n
                                  1. temporary hardness of water is removed by boiling
                                    \n<\/span><\/li>\n
                                  2. permanent hardness of water can be removed by using washing soda
                                    \n<\/span><\/li>\n<\/ol>\n

                                    b) Outline three disadvantages of hard water
                                    \n<\/span><\/p>\n<\/li>\n<\/ol>\n

                                    4. a) The atomic number of potassium is 19. Give three deductions which can be made
                                    \n<\/span><\/p>\n

                                    From this statement
                                    \n<\/span><\/p>\n

                                    b) The following element represent atoms of elements having their mass number and
                                    \n<\/span><\/p>\n

                                    atomic numbers Ar and K
                                    \n<\/span><\/p>\n

                                      \n
                                    1. What is the electronic configuration of Argon atom?
                                      \n<\/span><\/li>\n
                                    2. What is the electronic configuration of potassium ion (K+<\/sup>)
                                      \n<\/span><\/li>\n
                                    3. How many neutrons are there in the nucleus of Argon atom
                                      \n<\/span><\/li>\n
                                    4. Explain why argon atom has a lower atomic number but greater atomic mass compared to potassium?
                                      \n<\/span><\/li>\n<\/ol>\n

                                      5.a) Write a balanced chemical equation of
                                      \n<\/span><\/p>\n

                                        \n
                                      1. Potassium hydroxide react with sulphuric acid
                                        \n<\/span><\/li>\n
                                      2. Lead carbonate decomposed by heat
                                        \n<\/span><\/li>\n<\/ol>\n

                                        b) i) With chemical equation name the products formed when nitrates of potassium
                                        \n<\/span><\/p>\n

                                        and zinc decompose by heat
                                        \n<\/span><\/p>\n

                                          \n
                                        1. Suggest why nitrates of zinc and potassium behave differently on heating
                                          \n<\/span><\/li>\n<\/ol>\n
                                            \n
                                          1. \n
                                            a) Name the homologous series of organic compounds which are represented by the molecular formula
                                            \n<\/span><\/div>\n
                                              \n
                                            1. CnH2n+2<\/sub>
                                              \n\t\t\t\t\t<\/span><\/li>\n
                                            2. CnH2n<\/sub>
                                              \n\t\t\t\t\t<\/span><\/li>\n
                                            3. CnH2n-2<\/sub>
                                              \n\t\t\t\t\t<\/span><\/li>\n<\/ol>\n

                                              b) Write down all the possible isomers of the molecular formula C4 <\/sub>H9<\/sub> Br<\/sub>
                                              \n\t\t\t\t<\/span><\/p>\n<\/li>\n<\/ol>\n

                                              \n\u00a0<\/p>\n

                                              \n\u00a0<\/p>\n

                                              \n\u00a0<\/p>\n

                                              \n\u00a0<\/p>\n

                                              \n\u00a0<\/p>\n

                                                \n
                                              1. a) One of the method used for the preparation of oxygen is by decomposition of
                                                \n<\/span><\/li>\n<\/ol>\n

                                                Hydrogen peroxide
                                                \n<\/span><\/p>\n

                                                \n\u00a0<\/p>\n

                                                MnO2
                                                \n<\/sub><\/span><\/p>\n

                                                \"\"\/ 2H2<\/sub> O2(aq) <\/sub> 2H2<\/sub>0(i) + <\/sub>02(g)<\/sub>
                                                \n\t\t<\/span><\/p>\n

                                                \n\u00a0<\/p>\n

                                                  \n
                                                1. what is the role of manganese (IV) oxide (Mn02<\/sub> ) on the production of oxygen gas?
                                                  \n<\/span><\/li>\n
                                                2. what would happen if the reaction was made to proceed without manganese (IV) oxide?
                                                  \n<\/span><\/li>\n
                                                3. Calculate the volume of oxygen gas at S.T.P. which theoretically could be obtained from 50cm3<\/sup> of a solution of hydrogen peroxide containing 68g\/dm3 <\/sup>
                                                  \n\t\t\t<\/span><\/li>\n
                                                4. Why oxygen gas is collected by upward delivery or downward displacement of water?
                                                  \n<\/span><\/li>\n<\/ol>\n
                                                    \n
                                                  1. \n
                                                    a) 289500 coulombs were required to deposit one mole of a metallic element Q from its aqueous solution. Calculate the valence of Q
                                                    \n<\/span><\/div>\n

                                                    b) The following experiment was used to electroplate a metallic neck chain. Study it and answer questions that follows: –
                                                    \n<\/span><\/p>\n

                                                    \n\u00a0<\/p>\n

                                                    \"\"\/
                                                    \n\t\t\t\t<\/span><\/p>\n

                                                    \n\u00a0<\/p>\n

                                                    \n\u00a0<\/p>\n

                                                    \n\u00a0<\/p>\n

                                                    \n\u00a0<\/p>\n

                                                      \n
                                                    1. Explain what happened to anode and cathode
                                                      \n<\/span><\/li>\n
                                                    2. Write ionic equations for the reaction which occurred at the electrodes
                                                      \n<\/span><\/li>\n<\/ol>\n<\/li>\n<\/ol>\n

                                                      \n\u00a0<\/p>\n

                                                        \n
                                                      1. \n
                                                        a) Calculate the oxidation number for the underline element
                                                        \n<\/span><\/div>\n
                                                          \n
                                                        1. Cr<\/span>2<\/sub> 07<\/sub>
                                                          \n\t\t\t\t\t<\/span><\/li>\n
                                                        2. K Cl<\/span> 03<\/sub>
                                                          \n\t\t\t\t\t<\/span><\/li>\n
                                                        3. Mn<\/span>0
                                                          \n<\/span><\/li>\n<\/ol>\n

                                                          b) An element A has atomic number 12 and an element B has atomic number 17
                                                          \n<\/span><\/p>\n

                                                            \n
                                                          1. Write the chemical formula when B combines with A
                                                            \n<\/span><\/li>\n
                                                          2. What type of bond is formed?
                                                            \n<\/span><\/li>\n<\/ol>\n<\/li>\n<\/ol>\n

                                                            c) Write down two characteristics of the type of bond involved in 8 b (ii) above
                                                            \n<\/span><\/p>\n

                                                            \n\u00a0<\/p>\n

                                                            \n\u00a0<\/p>\n

                                                            \n\u00a0<\/p>\n

                                                              \n
                                                            1. \n
                                                              a) Give two examples in each of the following (i) Solid fuel (ii) gaseous fuel
                                                              \n<\/span><\/div>\n

                                                              b) The reaction which produce methanol from carbon Monoxide and hydrogen is represented by the equation
                                                              \n<\/span><\/p>\n<\/li>\n<\/ol>\n

                                                              \n\u00a0<\/p>\n

                                                              \"\"\/ CO(g)<\/sub> + H2(g)<\/sub> CH3<\/sub>0H(g)<\/sub>
                                                              \n\t\t<\/span><\/p>\n

                                                                \n
                                                              1. To get better yield of methanol what should be done on pressure
                                                                \n<\/span><\/li>\n
                                                              2. \"\"\/The value of H is negative. What does this tell about the reaction?
                                                                \n<\/span><\/li>\n
                                                              3. With reason state whether a high temperature or low temperature will give a better yield of methanol
                                                                \n<\/span><\/li>\n<\/ol>\n
                                                                  \n
                                                                1. \n
                                                                  0.48g of metal M was placed in a test tube and hot copper (II) sulphate solution was added to it and stirred until the reaction stopped. The metal M displaced copper (II) sulphate solution. Copper was filtered, washed with water dried at 1000<\/sup>C and the mass found to be 1.27g
                                                                  \n<\/span><\/div>\n

                                                                  The balanced chemical equation of the reaction occurred was:
                                                                  \n<\/span><\/p>\n

                                                                  \"\"\/M(s) <\/sub> + CuSO4(aq)<\/sub> MSO4(aq) <\/sub> + Cu(s)<\/sub>
                                                                  \n\t\t\t\t<\/span><\/p>\n<\/li>\n<\/ol>\n

                                                                  Calculate
                                                                  \n<\/span><\/p>\n

                                                                    \n
                                                                  1. The number of moles of copper that were formed and the number of moles of M that were used in the reaction
                                                                    \n<\/span><\/li>\n
                                                                  2. The relative atomic mass of M and hence identify the element M
                                                                    \n<\/span><\/li>\n<\/ol>\n
                                                                      \n
                                                                    1. \n
                                                                      Explain why?
                                                                      \n<\/span><\/div>\n
                                                                        \n
                                                                      1. Chemistry laboratory should have fume chamber
                                                                        \n<\/span><\/li>\n
                                                                      2. Sodium metal should be stored under paraffin oil
                                                                        \n<\/span><\/li>\n
                                                                      3. Hydrochloric acid is an acid
                                                                        \n<\/span><\/li>\n
                                                                      4. Concentrated H2<\/sub>SO4<\/sub> is used in the preparation of chlorine gas
                                                                        \n<\/span><\/li>\n
                                                                      5. Chlorine gas is diatomic
                                                                        \n<\/span><\/li>\n
                                                                      6. Noble gases do not form compounds
                                                                        \n<\/span><\/li>\n
                                                                      7. Group (I) elements are called ALIKAL METALS
                                                                        \n<\/span><\/li>\n<\/ol>\n

                                                                        \n\u00a0<\/p>\n<\/li>\n<\/ol>\n


                                                                        \n\t\t\tSECTION (C) (15)
                                                                        \n<\/strong><\/span><\/p>\n

                                                                        Answer only<\/strong> one question
                                                                        \n<\/span><\/p>\n

                                                                          \n
                                                                        1. Describe the causes, two effects and measures to be undertaken in \u2013order to prevent\/reduce the amount of acid rain
                                                                          \n<\/span><\/li>\n
                                                                        2. Using four examples, explain how the process of neutralization is important in day to day life.
                                                                          \n<\/span><\/li>\n<\/ol>\n

                                                                          \n\u00a0<\/p>\n

                                                                          \n\u00a0<\/p>\n

                                                                          \n\u00a0<\/p>\n

                                                                          \n\u00a0<\/p>\n

                                                                          \n\u00a0<\/p>\n

                                                                          \n\u00a0<\/p>\n

                                                                          \n\u00a0<\/p>\n

                                                                          \n\u00a0<\/p>\n

                                                                          \n\u00a0<\/p>\n

                                                                          \n\u00a0<\/p>\n

                                                                          \n\u00a0<\/p>\n


                                                                          \n\t\t<\/span>\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"

                                                                          \u00a0 THE PRESIDENT’S OFFICE REGIONAL ADMINISTRATION AND LOCAL GOVERNMENT MADABA DISTRICT COUNCIL DISTRICT MOCK EXAMINATION 032\/1 CHEMISTRY 1 FORM FOUR<\/p>\n","protected":false},"author":1,"featured_media":312,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,1],"tags":[],"class_list":["post-40","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-chemistry","category-uncategorized"],"yoast_head":"\nCHEMISTRY 1 FORM FOUR MOCK EXAMINATION, MADABA DISTRICT COUNCIL - MAKTABA EDUCATION CENTER<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/edu.co.tz\/notes\/chemistry-1-form-four-mock-examination-madaba-district-council\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"CHEMISTRY 1 FORM FOUR MOCK EXAMINATION, MADABA DISTRICT COUNCIL - 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