1992 - WAEC Chemistry Past Questions and Answers - page 1
When steam is passed over white-hot coke, the products are
The maximum number of electrons that can accommodated in the shell having the principal quantum number 3 is
Methanol is obtained from wood by
Study carefully the reaction represented by the equation below. 2H2O 2(l) → O 2(g) + 2H2O(l). Which of the following will not reaction increase the reaction rate?
Which of the following processes is a physical reaction?
If the volume of a given mass of gas at 298 K and pressure of 205.2 x 103 Nm-2 is 2.12dm3, what is volume of the gas at s.t.p? (Standard pressure = 101.3 x 103 Nm-2, Standard temperature = 273K)
The following acids are monobasic except
The reactions ethyne are mainly
When air is passed through potash and then pyrogallol, the components are noble gases,
The halide used widely in photography is