JAMB Chemistry 2018

A given amount of gas occupies 10.0dm³ at 4atm and 273°C. The number of moles of the gas present is [Molar volume of gas at s.t.p = 22.4dm³].

According to Charles’ law, the volume of a gas becomes zero at

A substance that is used as a ripening agent for fruits is

The Sulphide which is insoluble in dilute hydrochloric acid is

What is the pH of 0.001 moldm^-3 solution of sodium hydroxide?

The type of bonding in [Cu(NH₃)₄]²⁺ is

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

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

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

An element used in the production of matches is

Which of the following gases may not be dried with Concentrated sulphuric acid?

A correct electrochemical series can be obtained from Na, Ca, Al, Mg, Zn, Fe, Pb, H, Cu, Hg, Ag, Au by interchanging

A basic postulate of the kinetic theory of gases is that the molecules of a gas move in straight lines between collisions. This implies that

On which of the following is the solubility of a gaseous substance dependent? I. Nature of solvent II. Nature of solute III. Temperature IV. Pressure

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

The periodic classification is an arrangement of the elements in order of their increasing

If 1 litre of 2.2M sulphuric acid is poured into a bucket containing 10 litres of water and the resulting solution mixed thoroughly, the resulting sulphuric acid concentration will be

In the shown experiment above, the litmus paper will initially

The boiling of fat and aqueous caustic soda is referred to as

Which of the following pairs of substances will react further with oxygen to form a higher oxide?

In the preparation of oxygen by heating KClO₃ in the presence of MnO₂ only moderate heat is needed because the catalyst acts by

Methanoic acid mixes with water in all proportions and has about the same boiling point as water. Which of the following methods would you adopt to obtain pure water from a mixture of Sand, water and methanoic acid?

A quantity of electricity liberates 3.6g of Silver from its salt. What mass of aluminium will be liberated from its salt by the same quantity of electricity? [Al = 27, Ag = 108].

Suitable reagents for the laboratory preparation of nitrogen are

The number of electrons in the valence shell of an element of atomic number 14 is?

What volume of oxygen will remain after reacting 8cm³ of hydrogen gas with 20cm³ of oxygen gas?

If one of the following oxides is heated with hydrogen or carbon using a bunsen burner, it is not reduced to the metal. Which one is it?

The IUPAC name for CH₃-CH(CH₃)-CH₂-CH₃ is

An aqueous solution of a metal salt, M, gives a white precipitate with NaOH which dissolves in excess NaOH. With aqueous ammonia, the solution of M also gives a white precipitate which dissolves in excess ammonia. Therefore the cation in M is

What is the concentration of a solution containing 2g of NaOH in 100cm³ of solution? [Na = 23, O =16, H = 1]

How many atoms are present in 6.0g of magnesium? [Mg = 24, N_A = 6.02 x 10²³]

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

Beryllium and Aluminum have similar properties because they

For the reaction mE + nF ⇌ pG + qH, the expression for the equilibrium constant is

The reactions represented by the equations below demonstrate the
(I). 3CuO(s) + 2NH₃(g) → 3Cu(s) + 3H₂O(l) + N₂(g)
(II). 2NH₃(g) + 3Cl₂(g) → 6HCl(g) + N₂(g)
(III). 4NH₃(g) + 3O₂(g) → 6H₂O(l) + N₂(g)

The salt that reacts with dilute hydrochloric acid to produce a pungent smelling gas which decolourizes acidified purple potassium tetraoxomanganate(VII) solution is

The refreshing and characteristic taste of soda water and other soft drinks is as a result of the presence of

Which of the following are mixtures?
I. Petroleum
II. Rubber latex
III. Vulcanizer’s solution
IV. Carbon disulphide

A balanced chemical equation obeys the law of

When air which contains the gases Oxygen, nitrogen, carbondioxide, water vapour and the rare gases, is passed through alkaline pyrogallol and then over quicklime, the only gases left are;

In the laboratory preparation of oxygen, the gas cannot be collected by displacement of air because

2KClO₃(s) ^MnO2→ 2KCl(s) + 3O₂(g)
The importance of the catalyst in the reaction above is that

Which of the following is used to power steam engines?

In the reaction between sodium hydroxide and sulphuric acid solutions, what volume of 0.5 molar sodium hydroxide would exactly neutralise 10cm³ of 1.25 molar sulphuric acid?

To what volume must 300cm³ of 0.60M sodium hydroxide solution be diluted to give a 0.40M solution?

Diamond is a bad conductor of electricity because its bonding electrons are used in

The reaction between an organic acid and an alcohol in the presence of an acid catalyst is known as;

The constituent common to duralumin and alnico is

The solubility of a solid that dissolves in a given solvent with the liberation of heat will

What mass of Cu would be produced by the cathodic reduction of Cu²⁺ when 1.60A of current passes through a solution of CuSO₄ for 1 hour. (F=96500Cmol^-1, Cu=64)