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Chemistry CBSE Live product
Class 8
Nature of matter: Elements, compounds and mixtures
Pure substance and its classification
9.
Water as a compound
Question:
3
m.
Answer the following question
:
State two reasons to prove that water is a compound and not a mixture of hydrogen and oxygen.
i. Nature:
a.
Water -
Two hydrogen atom and one oxygen atom combined physically
Two hydrogen atom and one oxygen atom combined in a fixed ratio
Three hydrogen atom and one oxygen atom combined in a fixed ratio
Two hydrogen atom and one oxygen atom are mixed
.
b.
Mixture -
Components are not combined in a fixed ratio
Components are combined in a fixed ratio
Components are chemically combined in a fixed ratio
Components are combined in a specific ratio
.
ii. Separation:
a.
Water -
Chemical method
Hand picking
Physical method
Filteration
b.
Mixture -
chemical method
physical method
electrical method
thermal methid
Therefore, water is a compound and not a mixture of hydrogen and oxygen.
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