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اختبار الكتروني درس Water
اختبار الكتروني درس Water
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تكرار
1
water molecule is composed of......
one oxygen atom and one hydrogen atom
two oxygen atoms and one hydrogen atom
one oxygen atom and two hydrogen atoms
.two oxyen atoms and two hydrogen atoms
2
In water molecule,oxygen atom combines with two hydrogen atoms by two .......bonds
double covalent
ionic
single covalent
hydrogen
3
In water molecule,the angle between the two single covalent bonds is........
64
104
104.5
140.5
4
There are.........bonds among the water molecules
metalic
ionic
hydrogen
covalent
5
Water exists in.....in normal tempratures
solid state only
liquid state only
gaseous state only
1 و 2 و3
6
Water can dissolve.......
table salt
sugar
oil
1 و2
7
The high boiling point of water is due to the presence of............bonds
single covalent
double covalent
hydrogen
ionic
8
The snow crystal has ..............shape
octagonal
quadrilatrel
pentagonal
hexagnal
9
Ice crystals are characterized by all the following except they have ..............
low density
large
haxagonal shape
high density
10
A bottle is filled completely with water and put closed in the freezer. After sometime it breaks, Because when water freezes.............
its density increases and its volume remains constant
its volume increases and its density remains constant.
its volume increases and its density decreases .
its density increases and its volume decreases
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