Question

True or False: (1*10=10)

a) A compound is always heterogeneous.

b) The boiling of water is a physical change.

c) The intermolecular force of attraction is strongest in gas.

d) The process of sublimation is used on a large scale to obtain common salt from seawater.

e) Matter makes up all the materials around you.

f) The stretching of rubber band is an irreversible change.

g) In a mixture, each constituent exhibit its original properties.

h) Molecules are formed by the combination of atoms.

i) The burning of candle involves both physical and chemical changes.

j) The formation of a mixture does not involve any change in energy.
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Answer 1

Answer:

Molecule, a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance.