For each of the questions only one of the lettered responses is correct.
Select the correct response in each case.
Which one of the following equations represents a reaction of chlorine?
Which one of the following is true of the halogens as the Group is descended from chlorine to iodine?
In which one of the following sequences are the oxides of the elements classified as basic, amphoteric and acidic respectively?
In which one of the following changes has chlorine been oxidised?
When the hydrogen halides dissolve in water acidic solutions are formed. Which has the highest pH (assuming all are equal concentrations) ?
Which one of the following equations does not represent a reaction of chlorine under suitable conditions?
Which one of the following substances is ductile, easily cut with a knife and an electrical conductor?
Iodine solution can be decolourised by shaking with aqueous
An unknown salt is tested by:
(a) dissolving in water, adding dilute nitric acid followed by silver nitrate solution and then adding concentrated ammonia solution.
(b) dissolving in concentrated hydrochloric acid and carrying out a flame test.
The first test resulted in a cream precipitate which dissolved in an excess of ammonia. The second test produced a green flame.
The salt is
Which one of the following statements is correct as the atomic number increases across the second period from lithium to fluorine?
Which one of the following darkens when exposed to sunlight?
The presence of iodine can best be detected by