JAMB CHEMISTRY PAST QUESTIONS (UTME)

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.

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

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

Which of these require crystallization most?

The process that requires the use of hardwater in its operation is

In the discovery of protein, the instrument used is

An element used in the production of matches is

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

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

The compounds CH₃CH₂CHO and CH₃COCH₃ can be distinguished from each other using

Tartaric acid is used industrially to

Which of the activities is commonly used as a nuclear fuel

An oxidation state of or in K2CrO7

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

Vulcanization involve the removal of

2-methylprop-1-ene is an isomer of

In the industrial production of H₂ is removed by (solution)

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

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 shape of ammonia molecules is

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.

Elements P, Q, R, S have 6, 11, 15, 17 electrons respectively, therefore,

The above orbital diagram shown the electronic configuration of

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

The periodic classification is an arrangement of the elements

A liquid that will dissolve fat is

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

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

Hydrogen can be displaced from a lot alkaline solution by

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

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

A suitable reagent for distinguish between ethanoic and ethanol is

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

There are basic particles from which matter called be made except

Which of the following metals burns with brick red

The Sulphide which is insoluble in dilute hydrochloric acid is

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

The mass of silver deposited when a current of 10A is passed through a solution of silver salt for 4830s is – (Ag = 108 F = 96500(mol^-1)

Which of the following is the best starting material for the preparation of oxygen? Heating of trioxonitrate (v) with

The filter in the cigarette reduce the nicotine construct by

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

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

Atomicity of ozone is

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

The derivative of benzene that can be used in making explosives is

Aluminium hydroxide is used in the dyeing industry as a

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

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

P1V1 = P2V2 supports ?

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

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

Tin is unaffected by air at ordinary temperature due to its

A second alkanol can be oxidized to give an

Which of the following statements about catalyst is false?

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

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

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

When ΔH is negative, a reaction is said to be

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

An isomer of C₅H₁₂ is