A term commonly used for the first or the key tone of any scale
The name of the solution that fixes the image onto the photographic paper is thiosulfate salt. This is further explained below.
<h3>What is
thiosulfate salt. </h3>
Generally, An inorganic sodium salt known as sodium thiosulfate, sodium thiosulfate is made of sodium and thiosulfate ions in a ratio of 2:1.
In conclusion, Thiosulfate salt is the name of the solution used to permanently fix the picture on photographic paper.
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I'm pretty sure its Sonata-allegro or the theme and variations. Sorry if this doesn't help :(