may be made to recover its original goodness by boiling it in a solution of gelatin for some hours. It may be made soft and translucent by laying it in phosphoric acid of moderate strength ...

Edexcel questions courtesy of Pearson Education Ltd. The fertiliser ammonium phosphate can be made by adding ammonia solution from a burette, to dilute phosphoric acid solution in a flask.

Some manufacturers were using detergent powder in creams and phosphoric acid in drinks, leading to severe health risks. With the on-set of the summer season, the demand for ice cream, ice candy ...