Multiple Choice
Which one of the following statements is not correct?
A) Dry ice subliming is a physical change.
B) Methanol burning is a chemical reaction.
C) Sugar dissolving in water is a physical change.
D) Bleaching your hair is a chemical change (reaction) , even though it changes your physical appearance.
E) Liquid water turning into steam is a chemical reaction.
Correct Answer:
Verified
Correct Answer:
Verified
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Q18: If an atom is 0.1 nm in
Q19: The density of iron is 7.9 g/cm<sup>3</sup>.
Q20: Which statement A-D about the reaction of
Q22: Which of the following is not a
Q23: In 1 second, light can travel 2.998
Q24: Which of the following is not a
Q25: Which diagram depicts the process of sublimation
Q26: A significant difference in boiling points of