JAMB CHEMISTRY PAST QUESTIONS (UTME)

During the electrolysis of copper II sulphate between platinum electrodes, if litmus solution is added to the anode compartment

Aluminium hydroxide is used in the dyeing industry as a

In a neutralization reaction involving HCI and NaOH using litmus as indicator, the colour at the end point is

Tartaric acid is used industrially to

A given mass of gas occupies 2dm³ at 300k. At what temperature will its volume be doubled, keeping the pressure constant?

The oxidation number of iodine in KIO₃ is

Which of the following metals cannot replace hydrogen from water or steam?

The radioisotope used in industrial radiography for the rapid checking of faults in welds and casting is

A suitable reagent for distinguish between ethanoic and ethanol is

The constituent common to duralumin and alnico is

Which of the following metals is the most essential in the regulation of blood volume, blood pressure and osmotic equilibrium?

The shape of the S-orbital is

In the production of soap, concentrated sodium chloride solution is added to

Which of the following metals burns with brick red

The metal whose ore can be concentrated by passing it through a magnetic separator is

Which of the noble gases has the greatest ionization energy

If the molecular mass of tetraoxosulphate (VI) acid is 98, calculate its vapour density.

Flow of current in electrolytes is due to the movement of

Iron is often galvanized in order to

When large hydrocarbon molecules are heated at high temperature in the presence of a catalyst to give smaller molecules, the process is known as

Cast iron is used in making

The ionic radii of metals are usually

A major source of oxide of oxygen is from the burning of

The gas that is most useful in protecting humans against solar marathon is

The principle of column chromatography is based on th ability of the constituents to

What is the percentage of sulphur in sulphur (IV) oxide?

A gas X diffuses twice as fast as gas Y. if the relative molecular mass of X is 32, calculate the relative molecular mass of Y.

Diamond cannot be used

Tin is unaffected by air at ordinary temperature due to its

Which of the following is an example of a chemical change?

An isomer of C₅H₁₂ is

Which process(es) is/are involved in the turning of starch iodide paper blue-black by chlorine gas?

The leachate of a certain ash is used in local soap because it contain

200 cm³ of a gas at 25^oC exerts a pressure of 700 mmHg. Calculate its pressure if its volume increase 350 cm³ at 75^oC.

Atomicity of ozone is

The Sulphide which is insoluble in dilute hydrochloric acid is

The ability of carbon to form long chains is referred to as

Which of the following statements about catalyst is false?

A synthetic rubber is obtained from the polymerization of

The tincture of iodine means iodine dissolved in

Which of the compounds is composed of Al, Si, O and H?

The energy value of petrol can be determined by

Cathode rays cause an object placed behind a perforated anode to cast a shadow on the screen. This observation shows that the rays

In the discovery of protein, the instrument used is

Burning magnesium ribbon in air removes which of the following

(i) oxygen (ii) nitrogen (iii) argon and (iv) carbon(iv)oxide?

Calculate the amount in moles of silver deposited when 9650C of electricty is passed through a solution of silver salt [= 96500 Cmol^-1]

The above orbital diagram shown the electronic configuration of

A second alkanol can be oxidized to give an

The filter in the cigarette reduce the nicotine construct by

What technique is suitable for separating a binary solution of potassium chloride and potassium trioxochlorate (V)?

Ammonium chloride can be separated from its mixture with common salt by

The situation obtained when a perfect gas expands into a vacuum is

Which of these alloys contains copper?

Which of the following statements does not show Rutherford's account of Nuclear Theory? An atom contains a region

2-methylprop-1-ene is an isomer of

Which of the following properties is not peculiar to matter?

According to the Kinetic Theory an increase in temperature causes the kinetic energy of particles to

All these are electromagnetic waves except

When ammonia and hydrogen ion bond together to form ammonium ion, the bond formed is called

The salt formed from a weak acid and a strong base hydrolyzes in water to form