In this task, you are given a question and answer options for that question. Using this information, you have to classify each text into different topics: medicine, nursery, psychology, chemistry, pharmacology, biology.

[Q]: Question: For the analysis of traces of inorganic constituents, in samples of organic nature, a preliminary treatment of the sample is needed, which normally consists of: 
 Options:  <0> Dissolve the sample in cold water. <1> Dissolve the sample in hot water. <2> Dissolve the sample between 30 and 70 ºC. <3> Heat the sample between 400 and 700 ºC. <4> Heat the sample in 0.1 M hydrochloric acid.
[A]: chemistry


[Q]: Question: The reactions in which the kinetics does not depend on the nucleophilic concentration, are reactions: 
 Options:  <0> Radicals <1> SN1. <2> Pericyclic. <3> SN2. <4> None of the above.
[A]: chemistry


[Q]: Question: Which of these phrases about gluconeogenesis is not correct? 
 Options:  <0> In gluconeogenesis enzymatic reactions different from glycolysis are used. <1> Gluconeogenesis is the synthesis of glucose from precursors that are carbohydrates. <2> Gluconeogenesis has as main substrates lactate, amino acids, propionate and glycerol. <3> Gluconeogenesis occurs mainly in the cytosol. <4> Gluconeogenesis uses specific enzymes to avoid three irreversible reactions in glycolysis.
[A]:
chemistry