Question

Give reason for following assertions . a) ammonia is a compound b) air is a mixture , not a compound c) tap water is a mixture , not a compound

Answer 1

a) ammonia is made up of two elements called nitrogen and hydrogen in a fixed ratio by mass.
b) air is a homogeneous mixture which can be separated into its constituents by physical process. air has variable composition because different places contains different amount s of various gases.
c) tap water is a homogeneous mixture containing many dissolved salts .