JAMB Chemistry 2018 Past Questions

A given amount of gas occupies 10.0dm5 at 4atm and 273°C. The number of moles of the gas present is [Molar volume of gas at s.t.p = 22.4dm\(^3\)]

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 0.00 1 moldm\(^3\) solution of the sodium hydroxide

The type of bonding in [Cu(NH\(_3\))\(^4\)]\(^{2+}\) 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?

The Consecutive members of an alkane homologous series differ by

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

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 (Fig. 1) 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 KCIO, in the presence of MnO\(_2\) only moderate heat is needed because the catalyst acts by \(_2\)

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 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 8cm of hydrogen gas with 20cm 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 lUPAC name for

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 10 \(^{23}\)mol]

The radio isotope used in industrial radiography for the rapid checking of faults in welds and casting is?

Beryllium and Aluminium have similar properties because they

mE + nF -----> pG + qH 
In the equation shown, the equilibrium constant is given by?

(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 reactions represented by the equations above demonstrate the

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 sulphide

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(g) MNO3→ 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 300cm\(^3\) 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 the solids that dissolves in a given solvent with the liberation of heat will