Page 26 - Science E-Book Prep.2 2024-2025 1st term_Neat - Copy
P. 26
Some covalent compounds can’t dissolve in water as
oil. bec. it is a covalent compound which cannot
from hydrogen bond
3- Pure Water has high boiling point and low freezing point
water due to presence of hydrogen bonds between its
boilsat molecules.
100° and
freezes
at zero°
4- Water When temperature of water
density decreases than 4°, water
decreases molecules are collected together
on freezing: by hydrogen bond in a hexagonal
shape which occupy a larger
volume and so, a lower density.
G.R Although water of oceans freezes
at polar zones the aquatic creatures
are still alive?
At polar zones, when oceans freeze,
ice floats on surface preserving the
life of aquatic creatures.
On putting a glass bottle completely
filled with water in freezer it breaks?
Because When water freezes, its
volume increases
2nd Prep. First Term 34 26
