2013 - JAMB Chemistry Past Questions and Answers - page 1
The presence of an impurity in substance will cause the melting point to
What volume of carbon (ll) oxide is produced by reacting excess carbon with 10 dm3 of oxygen?
The rate of diffusion of a gas Y is twice that of Z If the relative molecular mass of Y is 64 and the two gases diffuse under the same conditions, find the relative molecular mass of Z
The radioisotope used in industrial radiography for the rapid checking of faults in welds and casting is
The shape of the carbon (lV) oxide molecule is
Which of the following molecules is held together by hydrogen bond?
The bond formed between two elements with electron configurations 1s2 2s2 2p6 3s2 and 1s2 2s2 2p4 is
The constituent of air that acts as a diluent is
Steam changes the colour of anhydrous cobalt (ll) chloride from
An example of a hygroscopic substance is