Properties Of Water Question Preview (ID: 49070)
Properties Of Water.
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What is a surfactant?
a) The uneven sharing of electrons that creates a slightly positive and negative side.
b) Anything that weakens hydrogen bonds, decreasing surface tension.
c) Raindrops forming round beads when they fall on a window
d) Water sticking to water
Which of the following statements best describes a polar molecule?
a) The uneven sharing of electrons that creates a slightly positive and negative side.
b) The even sharing of electrons.
c) It has an overall positive charge.
d) It has an overall negative charge.
Describe the structure of water.
a) H2O; Two positive oxygen atoms and one negative hydrogen atom.
b) H2O; Two negative hydrogen atoms and one positive oxygen atom
c) H2O; Two positive hydrogen atoms and one negative oxygen atom
d) H2O; Two positive hydrogen atoms and one positive oxygen atom
Water droplets sticking to the surface of the glass is an example of?
a) Surface tension
b) Capillary action
c) Cohesion
d) Adhesion
What is the pH of water?
a) 7; it is a base
b) 7; it is an acid
c) 7; it is neutral
d) 0; it is neutral
Why does water have high cohesion?
a) Water is non-polar and opposite charges attract.
b) Water is polar and opposite charges attract.
c) Water is polar and opposite charges repel.
d) Water is non-polar and opposite charges repel.
When food coloring climbs the stem of a flower, changing its color, it is evidence of
a) Capillary action
b) Density
c) Condensation
d) Surface Tension
Which two forces are working together to make a dome on a penny?
a) Cohesion and Adhesion
b) Cohesion and Capillary Action
c) Adhesion and Surface Tension
d) Cohesion and Surface Tension
What is the meaning of capillary action?
a) Water sticking to water
b) Water sticking to something else
c) The curved upper surface of a liquid in a graduated cylinder
d) The upward movement of water due to cohesive and adhesive properties
True or False: The hydrogen atoms in water are slightly negative.
a) True
b) False
c)
d)
Why does ice float in water?
a) Ice is less dense because of the tightly packed water molecules in ice crystals.
b) Ice is more dense because of the large space between water molecules in ice crystals.
c) Ice is less dense than water due to the large space between water molecules in ice crystals.
d) Ice is more dense because of the tightly packed water molecules in ice crystals.
Why do water molecules stick together?
a) Both sides are positive
b) Both sides are negative
c) One side has a negative charge and the other side has a neutral charge
d) One side has a positive charge and the other side has a negative charge
Why is water called the universal solvent?
a) Because water is polar and can dissolve many substances
b) Because water is non-polar and can dissolve many substances
c) Water can climb up tubes or small spaces
d) Water has a high surface tension
What percentage of the Earth's water is fresh water?
a) 97%
b) 3%
c) 5%
d) 10%
What is the only substance on Earth to exist in all 3 states?
a) Water
b) Oil
c) Salt
d) Sugar
What is the boiling point of water?
a) 110 degrees Celsius
b) 90 degrees Celsius
c) 100 degrees Celsius
d) 50 degrees Celsius
Gas to liquid
a) Evaporation
b) Condensation
c) Precipitation
d) Sublimation
Solid to gas
a) Condensation
b) Melting
c) Freezing
d) Sublimation
Solid to liquid
a) Melting
b) Freezing
c) Condensation
d) Evaporation
Liquid to gas
a) Condensation
b) Melting
c) Evaporation
d) Freezing
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