22. Ice can be changed to water by:
a) Adding more water molecules
b) Changing the motion of the water molecules
c) Rearranging the atoms in water molecules
d) Destroying the atoms in water molecules
e) None of these
23. The building blocks of elements are called:
a) Atoms
b) Molecules
c) Compounds
d) Isotopes
e) None of these
24. Boiling of an egg is a change which is:
a) Physical
b) Chemical
c) Physiological
d) Morphological
e) None of these
25. The temperature of liquid nitrogen is:
a) -32°C
b) -80°C
c) -100°C
d) -196°C
e) None of these
26. Which one of the following is an alkali?
a) water
b) vinegar
c) lemon juice
d) slaked lime
e) None of these