JAMB UTME - Chemistry - 1988
Question 1 Report
Which of the following will produce the greatest increase in the rate of the chemical reaction represented by the equation Na2S2O3(aq) + 2HCl(aq) → 2NaCI(aq) + H2O(I) + SO2(g) + S(g)?
Question 2 Report
The energy changes accompanying the addition of an electron to a gaseous atom is called?
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Question 3 Report
Which of the following acts as both a reducing and an oxidizing agent?
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Question 4 Report
A substance S is isomorphous with another substance R. When a tiny crystals of S is added into a supersaturated solution of R?
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Question 5 Report
The diagram above shows the reaction path of an exothermic reaction. The heat of reaction is represented by
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Question 6 Report
Which of the following reactions takes place in the cathode compartment during the electrolysis of copper (II) chloride solution?
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Question 7 Report
A metallic ion X2+ with an inert gas structure contains 18 electrons. How many protons are there in this ion?
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Question 8 Report
An eruption pollution an environment with gas suspected to be H2S, a poisonous gas. A residue team should spray the environment with?
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Question 10 Report
A mixture of starch solution and potassium iodide was placed in a test tube. On adding dilute tetraoxosulphate (lV) acid and then K2Cr2O7 solutions, a blue-black colour was produced. In this reaction, the?
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Question 11 Report
The IUPAC name for
Question 12 Report
The formula of a compound formed in a reaction between a trivalent metal M and a tetravalent non-metal X is~?
Question 13 Report
Given the reactions (i) Fe(s) + X(NO3)2(aq) → Fe(NO3) + X(s) (ii) H2(g) + XO → X + H2O(s); X is likely to be?
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Question 15 Report
Which property of a reversible reaction is affected by a catalyst?
Question 16 Report
The molar ratio of oxygen to nitrogen in dissolved air is 2:1 whereas the ratio is 4:1 in atmospheric air because?
Question 17 Report
The thermal decomposition of copper (ll)trioxonitrate (V) yields copper (ll) oxide, oxygen and?
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Question 18 Report
Which of the following substances is a basic salt?
Question 19 Report
The acidic hydrogen in the compound is the hydrogen attached to carbon number
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Question 20 Report
The forces holding naphthalene crystals together can be overcome when naphthalene is heated to a temperature of 354K resulting in the crystal to melting. These forces are known as?
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Question 21 Report
Which of the following physical properties decreases across the Periodic Table?
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Question 22 Report
Which of the following in aqueous solution is neutral to litmus?
Question 23 Report
In the experiment above, ammonium chloride crystals deposit on the walls of the tube is as a result of
Question 24 Report
What volume of a 0.1 M H3PO4 will be required to neutralize 45.0 cm3 of a 0.2 M NaOH?
Question 25 Report
Suitable reagents for the laboratory preparation nitrogen are?
Question 27 Report
Use the graph above to answer this question. The mass of a substance, M, liberated at an electrode during electrolysis is proportional to the quantity of electricity, Q passing through the electrolyte. This is represented graphically by.
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Question 30 Report
The ion that may be assumed to have negligible concentration in a sample of water that lathers readily with soap is?
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Question 31 Report
An increase in temperature causes an increase in the pressure of a gas because there is an increase in the?
Question 32 Report
What are the possible oxidation numbers of an element if its atomic number is 17?
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17 = 2, 8, 7
Question 35 Report
Methylethanoate reacts with ammonia to yield?
Question 36 Report
One mole of propane is mixed with five moles of oxygen. The mixture is ignited and the propane burns completely. What is the volume of the products at s.t.p?(G.M.V = 22.4 dm3 mol-1)
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C3H8 + 5O2 → 3CO2 + 4H2O
When the mixture is ignited CO2 is collected as product. From the equation 33 moles of CO2 is produced which equals 3 x 2.4 dm3 = 67.2 dm3 at S.T.P
Question 37 Report
What process would coal undergo to give coal gas, coal tar, ammoniacal liquor and coke?
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Question 39 Report
Detergents have the general formula?
Question 42 Report
Which of the following statements is NOT correct?
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Increasing the pressure confines the gas molecules to a smaller space, thereby reducing the volume. Reducing the pressure the other way round increases the volume of a gas.
Question 43 Report
2.25g of a sample of an oxide of copper on reduction gave 2.0g of copper. 2.50g of another oxide of copper on reduction also gave 2.0g of copper. These results are in accordance with the law of?
Question 44 Report
In the experiment above, ammonium chloride crystals deposit on the walls of the tube is as a result of
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Question 45 Report
When H2S gas is passed into a solution of iron (III) chloride, the colour changes from yellow to green. This is because?
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