Question

define close contact and precipitation reaction

Answer 1

CLOSE CONTACT
Patient care. The sharing of body fluids and blood with another person constitutes close contact, as does the bathing, clothing, and toileting of the sick person. Close contacts with contagious people may need prophylactic treatment, quarantine, or observation to ensure their health and the health of others

PRECIPITATION REACTION
A precipitation reaction refers to the formation of an insoluble salt when two solutions containing soluble salts are combined. The insoluble salt that falls out of solution is known as the precipitate, hence the reaction's name.