Question

D gas, liquid or solid impurities from a mixture.
e water
separated by
A sublimation
B evaporation to dryness.
using a separating funnel
D fractional crystallization
On of water
Itration and
stallation
19. Classify each of the following changes as either
a physical or a chemical change.
18. A mixture of oil and water can be easily
(a) The addition of water to quicklime (ie the
(b) The melting of candle wax
(c) The change in colour of zinc oxide from
white to yellow and vice versa during heating
and after cooling respectively.
(d) The dissolution of copper in concentrated
trioxonitrate(V) acid
(e) The dissolution of common salt in water
in The hardening of cement by the absorption
of carbon (IV) oxide
siaking of lime)
Co, and
using the​

Answer 1

Explanation:

there are do many questions please tell one question

Answer 2

Answer:

D )fractional crystallization  On of water

18 ) physical

physical

chemical

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