1. The negatively charged particle in an atom is
the (a) electron (b) neutron, (c) positron (d) proton.
2. How many contained in an atom
with atomic number (a) 7 (b) 6 (c) 6 (d) 3
3. The compound formed between $ X_{14}$ and $Y_{16}$ is (a)$XY$ (b) $XY_2$(c) $X_{2}Y$ (d) $X_{2}Y_{6}$
4.The van doc Waals' force are dominant intemolecular force in (a) ammonium chloride, (b) chlorine (c) sodium chloride, (d) water
5. The shape of a molecule of water is (a) nonlinear (b) octahedral (c) pyramidal (d) tetrahedral.
6.A metallic ion with an inert gas structure contains 18 electrons, How many protons are contained in this ion? (a) 20 (b) 18 (c) 16 (d) 2 7.
7. Which of the following pairs of compounds belongs to the same homologous series? (a)$C_{3}H_{6}$
and $C_{3}H_{6}$ (b) $C_{4}H_{10}$ and $C_{5}H_{10}$ (c) $C_{2}H_{4}$ and $C_{4}H_{10}$ (d) $C_{2}H_{6}$ and $C_{4}H_{10}$
8.Which of the following pairs of elements forms amphoteric oxudes? (a) Be and Mg (b) Na and K (c) B and Al (d) Si and Pb.
9. The following transition metal ions would be coloured in aqueous solution except (a) $Cr^{3+}$ (b) $Fe^{3+}$ (c) $Mn^{3+}$ (d) $Sc^{3+} $
10. The gas given off when ethanol reacts with sodium is (a) carbon(lV)oxide. (b) hydrogen. (c) methane. (d) oxygen.
11. Which of the following halogens is solid at room temperature? (a) Bromine (b) Chlorine (c) Flourine (d) Iodine.
12. The alkaline earth metals have similar chemical properties because (a) they are in the same period. (b) their salts are colourless. (c) they have the same number of valence electrons. (d) they are very reactive.
13. The number of unpaired electrons in an atom of an element QB is (a) 2 (b) 4 (c) 6 (d) 8
14. the bond formed when ammonia reacts with hydrogen ion to form ammonium ion is (a) covalent (b) dative (c) hydrogen bonds (d) ionic.
15. To which group and period respectively does an element with 15 electrons belong? (a) 3 and 3 (b) 3 and 5 (c) 5 and 3 (d) 5 and 5
16. The shape of a graphite crystal is (a) tetrahedral (b) pyramidal (c) octahedral (d) hexagonal.
17. Which ofthe following oxides is ionic? (a) $P _{4}O_{10} $
(b) $MgO$ (c) $AlO_{3}$ (d) $SO_{2} $
18. Which of the fo(lowing substances when boiled with aqueous solution of sodium hydroxide would be hydrolysed? I. Protein II. Fat III. Polythene (a) I (b) II (c) I and Il (d) II and III
19. Which of the following trioxonitrate (V) salts would decompose on heating to form a metal? (a)$Cu(NO_{3})_{2}$ (b)$ AgNO_{3}$ (c) $Pb(NO_{3})_{2}$ (d) $KNO_{3}$
20. Consider the following reaction equation: $ C_{2}H_{4(g)}+ 3O_{2(g)}\longrightarrow 2CO_{2(g)}+ H_{2}O_{(g)}$
The volume $CO_{2(g)}$ produced at s.t.p when 0.05moles of $C_{2}H_{4(g)}$ was burnt in $O_{2(g)}$ is
[Molar volume of gas = $22.4dm^3$] (a) $1.148rn^3$
(b) $2.24dm^3$ (c) $3.72dm^3$ (d) $4.48dm^3$
21. The number of oxygen molecules present in
16.0g of the gas is [Avogadro's number = $6.02 x 10^{23}$] (a) $6.02 \times 10^{22}$ (b) $6.02 \times 1023$ (c) $3.01 \times 10^{23}$ (d) $1.51 \times 10^{23}$
22. Consider the following reaction:
$ 2H_{aq}^{+}+ ye^{-} \longrightarrow SO_{3(aq)}^{2-}+ H_{2}O_{(l)}$ . The value of y in the equation is (a) 2 (b) 3 (c) 4 (d) 6.
23. The general gas equation was derived from (a) Boyle's and Gay Lussac's laws (b) Boyle's and Graham's laws (c) Boyle's and Charles' law (d) Dalton's atomic theory.
24. The vapour pressure of a liquid depends on: l. temperature ll. rate of condensation Ill. cohesive forces holding the particles together. (a) I (b) I and II (c) I and III (d) II and III
25. Which of the following gases will diffuse most rapidly? [H = 1.00, c = 12.0, O = 16.0, s = 32.0, Cl = 35.5]
(a) $Cl_{2}$ (b) $SO_{2}$ (c) $CH_{4}$
(d) $C_{2}H_{6}$
26. When a reaction is endothermic (a) entalph change, H is negative (b) heat content of product is less than the heat content of reactant (c) heat content of reactants is less than the heat of product (d) the reaction is non-spontaneous
27. Which of the following statements about intermolecular distances and cohesive forces between gas is correct? They are (a) both large. (b) both negligible. (c) constant and negligible. (d) large and negligible.
28. The following diagram illustrates the rate curve that was obtained when Mg reacted with excess dilute $HCl$.
The diagram became horizontal at X because (a) the reaction was slowed down.
(b) all has the reacted dilute HCI (c) All the Mg has reached (d) hydrogen gas is produced at a steady rate.
29. An example of an acid salt is (a) $CH_{3}COOONa$ (b) $Mg(OH)Cl$ (c) $MaHSO_{4}$ (d) $(NH34)_{2} SO_{4} $
30. Which of the following oxides can be reduced
by hydrogen? (a)Auminium oxide (b) oxide (c) Sodium oxide (d) Silver oxide
31 Solubility is practically applied in (a) fractional distillation (b) the determination of PH (c) the determination of saturation in hydrocarbons (d) solvent extraction.
32. Which of the following compound is the least soluble of in water? (a) $CaCl_{2}$ (b) $CaSO_4$
(c) $NaCl$ (d) $Na_{2}SO_4$
33. A substance which dissolves readily in organic solvent would (a) be a covalent compound (b) have strong electrostatic forces of attraction (c) have a high melting point (d) conduct electricity in molten state.
34. Consider the following equilibrium system: $2SO_{2(g)} + O_{2(g)} \longleftrightarrow 2SO_{3(g)}$ The addition of more $O_{2(g)}$ to the system will shift the equilibrium position to the (a) right leading to the production of more $SO_{3(g)}$(b) right leading to the production of more (c) left leading to the production of more $SO_{3(g)}$ (d) left leading to the production of more $SO_{3(g)}$
35. A change in the temperature of a saturated solution disturbs the equilibrium between the (a) undissolved solute and the solvent (b) dissolved solute and the solvent (c) dissolved solute and the undissolved solute (d) dissolved solute and the solution.
36. Which of the following statements about an electrochemical cell is correct? Oxidation ocurrs (a) at the anode. (b) at the cathode. (c) through the salt bridge. (d) in the aqueous solution.
37. Consider the following reaction equation:
$CuO_{(s)}+ H_{2(g)} \longrightarrow Cu_{s}+ H_{2}O_{(l)}$ Which
substance is oxidised? (a) $Cu$ (b) $CuO$ (c) $H_{2}$ (d) $H_{2}O$
38. Which of the following metals is the strongest reducing agent? (a) Sodium (b) Silver (c) Potassium (d) Copper.
39. The complete hydrogenation of benzene gives (a) cyclohexene. (b) cyclohexane (c) hexene. (d) hexane.
40. A compound has an emprical formula $CH_{2}O$ and molecular mass of 90. Determine its molecular formula. [H = 1.00, C = 12.0, O = 16.01] (a) $C_{4}H_{10}O_{2}$(b) $C_{3}H_{10}O_{2}$(c) $C_{3}H_{6}O_{3}$
(d) $C_{2}H_{2}O_{4}$
41. Which of the following reactions would take place when concentrated sodiumhydroxide solution is added to hot palm oil? (a)Esterification (b) Neutralisation
(c) Polymerisation (d) Saponification
42. Starch could be converted to glucose by the process of (a) condesation (b) dehydration (c) fermentation (d) hydrolysis
43. Which of the following compounds is a secondary alkanol? (a) ethanol (b) 2methylbutan-2-ol (c) 3-methylpentan-2-ol (d) propan-l-ol
44. Which of the following substances is a heavy chemical? (a) Ammonia (b) Barium hydroxide (c) Hydrochloric acid (d) Tetraoxosulphate(VI) acid
45. Which of the following process does not take place in domestic water treatment? (a) Chlorination (b) Flocculation
(c) Neutralisation (d) Sedimentation
46. A substance responsible for the sour taste to unripe oranges is (a) alkene. (b) alkanol. (c) alkanol acid. (d) alkanote.
47. Which of the following products of biotechnology can be used as a fuel in place of petrol? (a) Butane (b) Ethanol (c) Ethene (d) Propanol
48. Which of the following polymers is thermosetting? (a) Bakelite (b) Nylon (c) Polypropene (d) Polystyrene
49. The correct balanced equation for the reaction between aluminium metal and hot concentrated tetraoxosulphate (VI) acid is (a) $2Al_{(s)} +6H_{2}SO_{4(l)} \longrightarrow Al_{2}(SO)_{3(aq)} +6H_{2}O_{(l)}+ 3SO_{2(g)}$
(b) $2Al_{(s)} +3H_{2}SO_{4(l)} \longrightarrow Al_{2}(SO)_{4(aq)} +6H_{2}O_{(l)}+ 3SO_{2(g)}$
(c) $2Al_{(s)} +4H_{2}SO_{4(l)} \longrightarrow Al_{2}(SO)_{4(aq)} +8H_{2}O_{(l)}+ 4SO_{2(g)}$
(d) $2Al_{(s)} +3H_{2}SO_{4(l)} \longrightarrow Al_{2}(SO)_{4(aq)} +6H_{2}O_{(l)}+ 3SO_{2(g)}$
50. Which of the following gas is monoatomic? (a) Argon (b)Chlorine (c) Nitrogen (d) Oxygen
