Q.1.
The attraction that causes water and other liquids to form drops is called ________________. This is also water’s ability to be attracted to other water molecules.
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Q.2.
Water is a ____________________________ .
Q.3.
Water molecule is made of ___________ of hydrogen and __________________ atom of oxygen.
Q.4.
Sublimation is a process of changes in the state of matter from ___________________________________________
Q.5.
These two processes absorbs heat energy during the changes in the state of matter.
Q.6.
During electrolysis the ___________________ gas is produced at the anode
Q.7.
The impurities such salt when added to water will _______________ the freezing point of water.
Q.8.
Evaporation only occurs on the ___________________ of water
Q.9.
When we add salt into pure water, the boiling point of the solution will
Q.10.
Insects like daddy longlegs can move on the surface of the water because of
Q.11.
What is the name of the phenomenon than make the water moves from the bottom to the leaves?
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Q.12.
During electrolysis, the gas produced at anode is
Q.13.
When a lighted wooden splint is put a the mouth of the test tube containing this gas, a 'pop' sound is heard. What is the gas name?
Q.14.
The melting point of pure water is .................  °\degree° C
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Q.15.
The boiling point of pure water is ..............  °\degree° C
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Q.16.
The process of ice cube changes into water is know as ...................
Q.17.
This process involved the release of high amount of heat energy from water and makes the water molecules to become closer to each other in fixed position.
Q.18.
The process involved in the changes of ice cube into water vapour or vice verse.
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