2008 - JAMB Chemistry Past Questions and Answers - page 1
Chlorophyll obtained from given leaves of plant can be shown to be composed of more than one coloured component by the technique of
In countries where the temperature falls below 273K, salt is always sprinkled on the icy road in order to
2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g)
From the equation above, calculate the mass of sodium hydroxide produced by 2.3g of sodium.
[H = 1, O = 16, Na = 23]
16.8 g of sodium hydrogen trioxocarbonate (IV) is completely decomposed by heat. Calculate the volume of carbon(IV) oxide given off s.t.p
[Na 23, C = 12, O = 16, H = 1, Molar volume of a gas at s.t.p = 22.4 dm3]
300 cm3 of gas has a pressure of 800 mmHg. If the pressure is reduced to 650 mmHg, find its volume
Diffusion is slowest in solid particles than in particles of liquid and gases because
The experiment that showed that atoms have tiny positively charged nucleus was first carried out by
The atom of an element X is represented as zyX. The basic chemical properties of X depends on the value of
In the periodic table, the electrical and thermal conductivities are properties of elements that