When milk goes "sour," only a physical change has occurred.
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Q41: A physical picture used to illustrate a
Q42: Cooking vegetables with steam is a chemical
Q43: Match the substances with their classification.
-Brass
A)heterogeneous mixture
B)element
C)homogeneous
Q44: Match the substances with their classification.
-Breakfast cereal
Q45: Match the substances with their classification.
-Diamond
A)heterogeneous mixture
B)element
C)homogeneous
Q47: Match the substances with their classification.
-Oil-vinegar salad
Q48: It is scientifically proper to construct a
Q49: Match the substances with their classification.
-Lemonade (without
Q50: Match the substances with their classification.
-Golden nugget
A)heterogeneous
Q51: Evaporated ethanol can be isolated by cooling,
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