Dissolve the sugar in water and then evaporate the water
Put it in water. When you do this the sugar will float all around and the flour will turn in dough.
The sugar dissolves. The sand does not.
No, it is a chemically homogeneous substance.
There are many types of sugar but, if you are describing one type of sugar and not a mixture of many sugars it would be a pure substance.
no
The likely word is meringue (beaten egg white and sugar mixture).
No, because not all white foods contain sugar so how could they turn into sugar if they contain none.
Table sugar is a pure substance. It is made up of one type of molecule that cannot be separated into two or more components. Mixtures can be separated. For example, a mixture of water and sand can be separated into two components. Other examples of pure substances are diamonds, and table salt.
white sugar is sugar.
IT's when the egg white is beaten with the sugar until light and fluffy then the flour is gently folded through the mixture.
This could be for instance sugar or table salt: both neutral, white and crystallic, but there are many, many more.
You could substitute splenda or another sweetener.