2015 JAMB Chemistry Past Questions

The filter in the cigarette reduce the nicotine construct by

Which of these require crystallization most?

Iron is often galvanized in order to

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

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

Vulcanization involve the removal of

The acid in electrolysis of water is dilute

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

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

Atomicity of ozone is

Which of the noble gases has the greatest ionization energy He

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

An elements used in production of matches 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 suitable reagent for distinguish between ethanoic and ethanol is

In the discovery of protein, the instrument used is

The above orbital diagram shown the electronic configuration of

Which of the following metals burns with brick red

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

A liquid that will dissolve fat is

Tartaric acid is used industrially to

P1V1 = P2V2 supports ?

A fixed mass of gas a volume of 92cm3 at 3°C. When will be its volume at 18C if the pressure remains constant?

Which of the following ion’s requires the quantity of electricity for discharge at an electrode

Hydrogen can be displaced from a hot alkaline solution by

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

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

Rare gases are suitable because they

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

Which of the activities is commonly used as a nuclear fuel

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

All these are electromagnetic waves except

Cu₂S_(s) + O2(g) = 2CU_(s) + SO2_2(g)

The number of isomers formed by C₆H₁₄ is

There are basic particles from which matter called be made except

The energy value of petrol can be determined by

What volume of 0.5mldm³ H₂SO₄ will exactly neutralize 20cm³ of 0.1moldm³ NaOH Solution?

A compound contains 40.0% carbon, 6.7% hydrogen and 53.3% oxygen. If the molar mass of the compound is 180, Find the molecular formula [H = 1, C = 12, O = 16)

An oxidation state of Cr in K2CrO7

The elements that belong to the third period of periodic table are

When sugar is dissolve in ten, the reaction is accomplished by

NH_3(g) + HCl_(s) → NH ₄Cl _(s)

The entropy change in the system above is

Detergents are manufacture with strength hydrocarbon chains is to make them

Which of the following results in the fall of acid rain?

The fuming of kettles is caused by the presence in the water of

A difference between chemical and physical change is that in a chemical change

According to the kinetic theory an absence in temperature causes the kinetic energy of particles to

PCL5(g)= PCL3(g) + Cl2(g)

In the reaction above, a decrease in pressure will

Which of the following gives a precipitation when treated with NaOH Solution?

Electronic configuration of an elements 13x in the subsidiary energy level is