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Worksheets6.3 Compounds
Total questions: 10
Worksheet time: 6mins
1. Compound can be separated ________.
physically
chemically
2. A compound can only be separated chemically by the process of _______________.
photosynthesis
electrolysis
respiration
combustion
3. Water consists of ___________ and __________.
carbon dioxide
oxygen
carbon monoxide
hydrogen
4. Hydrogen gas is connected to the negative electrode which is called ______________
anode
cathode
5. Oxygen gas is connected to the positive electrode which is called ________________.
anode
cathode
6. Give the ratio of oxygen to hydrogen in water.
2:1
1:2
2:2
1:1
7. State the name of the acid that mixed with water during the process of electrolysis.
nitrate acid
sulphuric acid
8. Physical change form a new substance.
YES
NO
9. Photosynthesis is an example of chemical change.
YES
NO
10. How to determine the presence of oxygen in electrolysis ?
Lime water turns cloudy.
Lights up the glowing wooden splinter.
Extinguishes the wooden splinter.
The blue litmus paper turns red.
