JAMB UTME - Chemistry - 1988
Swali 1 Ripoti
A substance S is isomorphous with another substance R. When a tiny crystals of S is added into a supersaturated solution of R?
Maelezo ya Majibu
Swali 2 Ripoti
The ion that may be assumed to have negligible concentration in a sample of water that lathers readily with soap is?
Maelezo ya Majibu
Swali 3 Ripoti
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?
Maelezo ya Majibu
Swali 4 Ripoti
The diagram above shows the reaction path of an exothermic reaction. The heat of reaction is represented by
Maelezo ya Majibu
Swali 5 Ripoti
An increase in temperature causes an increase in the pressure of a gas because there is an increase in the?
Maelezo ya Majibu
Swali 6 Ripoti
A metallic ion X2+ with an inert gas structure contains 18 electrons. How many protons are there in this ion?
Maelezo ya Majibu
Swali 7 Ripoti
Which of the following statements is NOT correct?
Maelezo ya Majibu
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.
Swali 9 Ripoti
In the experiment above, ammonium chloride crystals deposit on the walls of the tube is as a result of
Maelezo ya Majibu
Swali 10 Ripoti
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?
Maelezo ya Majibu
Swali 12 Ripoti
What are the possible oxidation numbers of an element if its atomic number is 17?
Maelezo ya Majibu
17 = 2, 8, 7
Swali 13 Ripoti
What volume of a 0.1 M H3PO4 will be required to neutralize 45.0 cm3 of a 0.2 M NaOH?
Maelezo ya Majibu
Swali 17 Ripoti
Which of the following physical properties decreases across the Periodic Table?
Maelezo ya Majibu
Swali 20 Ripoti
The acidic hydrogen in the compound is the hydrogen attached to carbon number
Maelezo ya Majibu
Swali 21 Ripoti
The energy changes accompanying the addition of an electron to a gaseous atom is called?
Maelezo ya Majibu
Swali 22 Ripoti
An eruption pollution an environment with gas suspected to be H2S, a poisonous gas. A residue team should spray the environment with?
Maelezo ya Majibu
Swali 23 Ripoti
The molar ratio of oxygen to nitrogen in dissolved air is 2:1 whereas the ratio is 4:1 in atmospheric air because?
Swali 24 Ripoti
The IUPAC name for
Swali 26 Ripoti
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)
Maelezo ya Majibu
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
Swali 27 Ripoti
The formula of a compound formed in a reaction between a trivalent metal M and a tetravalent non-metal X is~?
Swali 28 Ripoti
Methylethanoate reacts with ammonia to yield?
Swali 29 Ripoti
In the experiment above, ammonium chloride crystals deposit on the walls of the tube is as a result of
Maelezo ya Majibu
Swali 30 Ripoti
When H2S gas is passed into a solution of iron (III) chloride, the colour changes from yellow to green. This is because?
Maelezo ya Majibu
Swali 32 Ripoti
What process would coal undergo to give coal gas, coal tar, ammoniacal liquor and coke?
Maelezo ya Majibu
Swali 34 Ripoti
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?
Maelezo ya Majibu
Swali 35 Ripoti
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?
Maelezo ya Majibu
Swali 36 Ripoti
Which of the following acts as both a reducing and an oxidizing agent?
Maelezo ya Majibu
Swali 38 Ripoti
The thermal decomposition of copper (ll)trioxonitrate (V) yields copper (ll) oxide, oxygen and?
Maelezo ya Majibu
Swali 39 Ripoti
Detergents have the general formula?
Swali 40 Ripoti
Which of the following reactions takes place in the cathode compartment during the electrolysis of copper (II) chloride solution?
Maelezo ya Majibu
Swali 41 Ripoti
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)?
Maelezo ya Majibu
Swali 43 Ripoti
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.
Maelezo ya Majibu
