JAMB UTME - Chemistry - 2008

In recharging a lead-acid accumulator, the reaction at the cathode can be represented as

The atom of an element X is represented as ${}_z^{y}X$. The basic chemical properties of X depend on the value of

If a given quantity of electricity liberates 0.65g of Zn2+, what amount of Hg2+ would be liberated by the same quantity of current?

[Zn = 65, Hg = 201]

Insoluble salts can be prepared by

The diagram above represent the electron sub-level for

When a few drops of water is added to a blue anhydrous cobalt (II) chloride, the colour changes to

NH3(g) + HCl(s) → NH4Cl(s)

The entropy change in the system above is

The basicity of CH3COOH is

The most common ores of iron include

In countries where the temperature falls below 273K, salt is always sprinkled on the icy road in order to

A catalyst speeds up the rate of chemical reaction by

16.8 g of sodium hydrogen trioxocarbonate (IV) is completely decomposed by heat. Calculate the volume of carbon(IV) oxide given off s.t.p

[Na 23, C = 12, O = 16, H = 1, Molar volume of a gas at s.t.p = 22.4 dm3]

When a solution of ammonium trioxocarbonate (IV) is added to a solution of an unknown salt, a white precipitate which is soluble in dilute hydrochloric acid but insoluble in ethanoic acid is formed. This indicates the presence of

2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g)

From the equation above, calculate the mass of sodium hydroxide produced by 2.3g of sodium.

[H = 1, O = 16, Na = 23]

Chlorophyll obtained from given leaves of plant can be shown to be composed of more than one coloured component by the technique of

Which of the following reaction is endothermic?

The oxidation state of carbon in HCOOH is

Use the diagram to answer this question.

The colour of the fountain water is

Leads is used for making bullets and lead shots because of its

${}_{11}^{11}Na{+}_0^{1}n{\to }_{11}^{24}Na$

The reaction above is an example of

Detergents are manufactured with straight hydrocarbon chains so as to make them

Reduction of nitroalkanes, nitrites and amides is a route for the preparation of

The vulcanizer's solution is prepared by dissolving rubber in

Choose the correct option from the structure above

117.0g of sodium chloride was dissolved in the solubility in 1.0dm3 of distilled water at 25oC. Determine the solubility in mol dm-3 of sodium chloride at that temperature

[Na = 23, Cl = 35.5]

Reduction of alkanonoes with LialH4 produces

Air boiled out of water as steam is richer in

A hydrocarbon X with a molar mass of 26 consists of 92.3% carbon. What is its molecular formular

The uncovered raw food that is sold along major roads is likely to contain some amounts of

In the periodic table, the electrical and thermal conductivities are properties of elements that

If the silver mirror test is positive, it indicates the presence of an

Polyvinyl chloride is used in the production of

The product obtained when a mixture of benzene vapour and hydrogen are passed over nickel catalyst at 180oC is

The rate of a reaction usually decrease in the concentration of reactants because

Which of the following compounds of trioxonitrate (V) will decomposes to give dinitrogen (i) oxide and water when heated?

What is the IUPAC nomenclature of the compound NaCIO?

300 cm3 of gas has a pressure of 800 mmHg. If the pressure is reduced to 650 mmHg, find its volume

If glucose is heated with concentration tetraoxosulphate (VI) acid, it will be dehydrated to

Diffusion is slowest in solid particles than in particles of liquid and gases because

Use the diagram to answer this question.

The gas that can be used to demonstrate the experiment is

The substance that is used in the steel industry for the removal of carbon, sulphur and phosphorus impurities from pig iron is

The experiment that showed that atoms have tiny positively charged nucleus was first carried out by

The type of isomerism shown by cis- and trans- isomers is

The IUPAC nomenclature for the structure above is

In the course of purifying water for town supply the water is passed through large settlings tanks, containing sodium aluminate (III) to remove

0.05 mol dm-3 HCl is neutralized by 25 cm3 NaOH. If the volume of acid used is 32.00cm3, what is the concentration of the base