2015 - JAMB Chemistry Past Questions and Answers - page 3

Kerosene is only liquid that will dissolve fat. Option A,B,D will not dissolve fat because of their chemical composition

A is the correct answer. Tartaric acid is found in cream of tartar, which is used in cooking candies and frostings for cakes. Tartaric acid is also found in baking powder, where it serves as the source of acid that reacts with sodium bicarbonate (baking soda)

V = 1/P

cross multiply

K = VP

V1P1 = V2V2

For a fixed amount of an ideal gas kept at a fixed temperature, pressure and volume are inversely proportional. Or Boyle's law is a gas law, stating that the pressure and volume of a gas have an inverse relationship, when temperature is held constant.
The equations supports only Boyle’s law. Option A,C,D are not in support of the equation...

V1 ÷ T1 = V2 ÷ T2
T1 = 3 × 273 = 276k
T2 = 18 + 273 = 291k
V1 = 92cm³
V2 = ?
V2 = (V1T2) ÷ T1 = (92 × 291) ÷ 276
= 97.0cm³

2.0 mole of Q³⁺ ions require the largest quantity of electricity for discharge at an electric. option B,C,D are all carrying a smaller quantity of electricity which not be proven for ant discharge

Fe displaces hydrogen from hot alkaline solution. Options B,C,d will not displace hydrogen

Only primary alkanols undergo oxidation to produce alkanoic acid. Option A,B,C will not produce alkanoic acid

Rare gases are stable because they have duplet or octet electronic configurations in the outermost shells in their atoms, as a result they don’t go into solution easily. option A, B, Dare not because they go into solution easily (unstable)

Coal is a major senses of oxide of nitrogen. Option B,C, D do not contribute to the anode Nitrogen either. They are sources of oxides of carbon of sulphur etc

Uranium is common nuclear because of its less stability as a result has a great tendency to increase energy than. Options B,C,D which are not stable