JAMB CHEMISTRY PAST QUESTIONS (UTME)

Which of the following statements is correct about the periodic table?

The enzyme used in the hydrolysis of starch to dextrin and maltose is

A synthetic rubber is obtained from the polymerization of

Which of the following alkaline metals react more quickly spontaneously with water?

A small quantity of solid ammonium chloride (NH4Cl) texted gently in a test tube, the solid gradually disappear produce two gases. Later, a white cloudy deposit was absence on the cooler part of the test tube. The ammonium chloride is to have undergo

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

When salt loses its water of crystallization to the atmosphere on exposure, the process is said to be

Calculate the percentage composition of oxygen in calcium trioxocarbonate(IV) [Ca=40, C=12, O=16]

The elements in the periodic table are listed in order of increasing

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.

Tartaric acid is used industrially to

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

Which of the activities is commonly used as a nuclear fuel

An isomer of C₅H₁₂ is

Which of the following represents the kind of bonding present in ammonium chloride?

Which of these require crystallization most?

Which of the noble gases has the greatest ionization energy

A liquid that will dissolve fat is

Tin is unaffected by air at ordinary temperature due to its

When ΔH is negative, a reaction is said to be

To what temperature must a gas at 273k be heated in order to double both its volume and pressure?

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

The constituent common to duralumin and alnico is

Iron is often galvanized in order to

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

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

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

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

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

Flow of current in electrolytes is due to the movement of

A second alkanol can be oxidized to give an

The process that occurs when two equivalent forms of a compound are in equilibrium is

Which of the following statements about catalyst is false?

In the discovery of protein, the instrument used is

The number of electronic shells contained in an atom with electron configuration 1s²2s²2p⁶3s²3p⁶4s² is

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

Which of the following does not support the fact that air is a mixture?

Which of the following statements is correct about the periodic table?Which of the following statements is correct about the periodic table?

The above orbital diagram shown the electronic configuration of

Which of the following types of alkanols undergo oxidation to produce alkanoic acids.

I. Primary alkanols
II. Secondary alkanols
III. Tertiary alkanols

An oxidation state of or in K2CrO7

The weakest attractive force that can be observed between two molecules is

An element used in the production of matches is

The filter in the cigarette reduce the nicotine construct by

The oxidation number of iodine in KIO₃ is

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

Which of these alloys contains copper?

A mixture is different from a compound because

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

Which of the following will give a precipitate with an aqueous solution of copper (I) chloride?

Atomicity of ozone is

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

The periodic classification is an arrangement of the elements

Which of the following properties is not peculiar to matter?

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

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

Hydrogen can be displaced from a lot alkaline solution by

All these are electromagnetic waves except

2-methylprop-1-ene is an isomer of

The energy value of petrol can be determined by