If heat energy is absorbed by the system during a chemical reaction, the reaction is said to be

The dispersed phase is liquid and dispersed medium in milk is liquid

What record? the question is incomplete

Answerbonded to an amino group(nh2);

Remember that rust prevented by placing a sacrificial electrode in electrical contact with the iron. the sacrificial electrode must be composed of a metal that  oxidizes  more easily than iron (that is, it must be below iron in table 18.1).