JAMB UTME - Chemistry - 1988
Tambaya 1 Rahoto
In the experiment above, ammonium chloride crystals deposit on the walls of the tube is as a result of
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Tambaya 2 Rahoto
The diagram above shows the reaction path of an exothermic reaction. The heat of reaction is represented by
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Tambaya 4 Rahoto
The thermal decomposition of copper (ll)trioxonitrate (V) yields copper (ll) oxide, oxygen and?
Tambaya 5 Rahoto
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?
Tambaya 6 Rahoto
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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Tambaya 7 Rahoto
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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Tambaya 9 Rahoto
Which property of a reversible reaction is affected by a catalyst?
Tambaya 10 Rahoto
What volume of a 0.1 M H3PO4 will be required to neutralize 45.0 cm3 of a 0.2 M NaOH?
Tambaya 11 Rahoto
The formula of a compound formed in a reaction between a trivalent metal M and a tetravalent non-metal X is~?
Tambaya 12 Rahoto
Which of the following physical properties decreases across the Periodic Table?
Tambaya 13 Rahoto
The molar ratio of oxygen to nitrogen in dissolved air is 2:1 whereas the ratio is 4:1 in atmospheric air because?
Tambaya 15 Rahoto
Methylethanoate reacts with ammonia to yield?
Tambaya 16 Rahoto
Which of the following reactions takes place in the cathode compartment during the electrolysis of copper (II) chloride solution?
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Tambaya 17 Rahoto
The acidic hydrogen in the compound is the hydrogen attached to carbon number
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Tambaya 18 Rahoto
What process would coal undergo to give coal gas, coal tar, ammoniacal liquor and coke?
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Tambaya 20 Rahoto
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.
Tambaya 21 Rahoto
Which of the following in aqueous solution is neutral to litmus?
Tambaya 22 Rahoto
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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Tambaya 23 Rahoto
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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Tambaya 24 Rahoto
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)?
Tambaya 25 Rahoto
An increase in temperature causes an increase in the pressure of a gas because there is an increase in the?
Tambaya 26 Rahoto
A metallic ion X2+ with an inert gas structure contains 18 electrons. How many protons are there in this ion?
Tambaya 28 Rahoto
The IUPAC name for
Tambaya 29 Rahoto
Which of the following acts as both a reducing and an oxidizing agent?
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Tambaya 30 Rahoto
The energy changes accompanying the addition of an electron to a gaseous atom is called?
Tambaya 31 Rahoto
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?
Tambaya 32 Rahoto
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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Tambaya 33 Rahoto
Detergents have the general formula?
Tambaya 34 Rahoto
Which of the following substances is a basic salt?
Tambaya 36 Rahoto
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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Tambaya 37 Rahoto
In the experiment above, ammonium chloride crystals deposit on the walls of the tube is as a result of
Tambaya 39 Rahoto
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
Tambaya 40 Rahoto
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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Tambaya 45 Rahoto
Suitable reagents for the laboratory preparation nitrogen are?
