Q:Information: - Thermal runaway occurs in situations where an increase in temperature changes the conditions in a way that causes a further increase in temperature, often leading to a destructive result. It is a kind of uncontrolled positive feedback. - Cadet's fuming liquid was the first organometallic compound to be synthesized. In 1760, the French chemist Louis Claude Cadet de Gassicourt (1731-1799) synthesized a red liquid by the reaction of potassium acetate with arsenic trioxide. - Arsenic trioxide is an inorganic compound with the formula . This commercially important oxide of arsenic is the main precursor to other arsenic compounds, including organoarsenic compounds. Approximately 50,000 tonnes are produced annually. Many applications are controversial given the high toxicity of arsenic compounds. - Cacodyl oxide is a chemical compound of the formula [(CH)As]O. This organoarsenic compound is primarily of historical significance since it is sometimes considered to be the first organometallic compound synthesized in relatively pure form. - Spontaneous combustion or spontaneous ignition is a type of combustion which occurs by self-heating (increase in temperature due to exothermic internal reactions), followed by thermal runaway (self heating which rapidly accelerates to high temperatures) and finally, autoignition. - Cacodyl , dicacodyl , tetramethyldiarsine , alkarsine or minor part of the '' Cadet 's fuming liquid '' ( after the French chemist Louis Claude Cadet de Gassicourt ) ( CH3 ) 2As -- As ( CH3 ) 2 is a poisonous oily liquid with a garlicky odor . Cacodyl undergoes spontaneous combustion in dry air . - He obtained a red liquid by the reaction of potassium acetate with arsenic trioxide. This liquid is known as Cadet's fuming liquid and contains the two compounds cacodyl and cacodyl oxide. - Combustion or burning is a high-temperature exothermic redox chemical reaction between a fuel (the reductant) and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke. Combustion in a fire produces a flame, and the heat produced can make combustion self-sustaining. Combustion is often a complicated sequence of elementary radical reactions. Solid fuels, such as wood, first undergo endothermic pyrolysis to produce gaseous fuels whose combustion then supplies the heat required to produce more of them. Combustion is often hot enough that light in the form of either glowing or a flame is produced. A simple example can be seen in the combustion of hydrogen and oxygen into water vapor, a reaction commonly used to fuel rocket engines. This reaction releases 242kJ/mol of heat and reduces the enthalpy accordingly (at constant temperature and pressure): - Potassium acetate (KCHCOO) is the potassium salt of acetic acid. After reading the paragraphs above, we are interested in knowing the entity with which 'cacodyl' exhibits the relationship of 'instance of'. Find the answer from the choices below. Choices: - chemical compound - chemical reaction - combustion - enthalpy - formula - hydrogen - inorganic compound - liquid - mixture - oxide - part - salt - sequence - temperature - two
A:
chemical compound