Suppose 'A' is a liquid aromatic compound with molecular weight 78 and burns with sooty flame. a. Give the name of the compound 'A' b. write the molecular structure of 'A' C. What is the product when 'A' is treated with ? i. conc. HNO3 with conc. H2SO4 as catalyst ii. Halogen (cl2)in presence of sunlight and mention the use of the product obtained​

Achemical reaction (also known as a chemical change) produces substances that are chemically different from the starting materials. an example of a chemical reaction is the formation of water from hydrogen and oxygen gas.in a physical change, a substance changes its physical appearance but not its chemical identity. an example of physical change is the formation of liquid water from solid water, a familiar process called melting. physically, liquid water looks very different from solid water (ice) but the chemical identity, water, is the same for both. which of following changes that affect the composition of our atmosphere involve physical changes and which involve chemical reactions? oxygen gas changes to ozone during thunderstorms carbon dioxide is produced by the combustion of gasoline in an automobile engine. when coal, oil, and natural gas are decomposed in landsills they produce methane gas. freezing rain develops when a warm air mass overrides a cold air mass. fog forms from water vapor when the temperature drops below the dew point

Which type of substance ionizes partially and gives off hydrogen ions when dissolved in water? a. strong acid b. strong base c. weak acid d. weak base

Compare and contrast physical changes with chemical changes.