Topic - Chemical Changes Examples
In these Worksheets for Science you will find different questions related to the topic Chemical Changes Examples that will help you to practice the topic more efficiently.
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| Worksheets for Science (Topic - Chemical Changes Examples) |
Multiple Choice Questions
1. There are _____________ types of changes.
(a) two (b) three (c) five
2. Chemical changes are ______________.
(a) temporary (b) permanent (c) reversible
3. Burning of wood is a ________________ change.
(a) physical (b) chemical (c) temporary
4. Burning of paper is a _______________ process.
(a) reversible (b) irreversible (c) physical
5. Burning of magnesium ribbon is a ______________ process.
(a) irreversible (b) reversible (c) physical
6. Melting of candle is a _______________ process.
(a) chemical (b) physical (b) irreversible
7. The colour changes from grey to ________________ after rusting of iron.
(a) blue (b) green (c) reddish brown
8.The process of rusting is grouped under this type of change. _____________
(a) chemical (b) irreversible (c) both a and b
9. Milk is a liquid while curd is a _____________ .
(a) solid (b) semi-solid (c) liquid
10. The taste of milk and curd is ___________.
(a) similar (b) same (c) different
Answers - 1.two 2.permanent 3.chemical 4.irreversible 5.irreversible 6.physical 7.reddish brown 8.both a and b 9.semi-solid 10.different
Fill ups
1. The two types of changes are physical and ______________ changes.
2. In _____________ changes, new substances are formed.
3. _______________ and ______________ are produced after burning of wood.
4. _______________ is produced after burning magnesium ribbon.
5. A candle ______________ on burning.
6. The melted candle can be changed back into _______________.
7. Moisture and _______________ is produced after the burning of candle.
8. Solid iron changes to ________________ form after rusting.
9. Iron loses its property of _____________ after rusting.
10. Souring of milk is a ________________ and ________________ change.
Answers - 1.chemical 2.chemical 3.ash, smoke 4.magnesium oxide 5.melts 6.wax 7.carbon dioxide 8.powder 9.magnetism 10.chemical, irreversible
Write True if the statement is correct and False if the statement is incorrect.
1. The properties of substance don't change after chemical changes.
2. Chemical changes are reversible.
3. Carbon dioxide is produced after burning of paper.
4. Burning of paper is a physical change.
5. Water vapours are not produced after burning of paper.
6. Burning of wood is a chemical process.
7. A magnesium ribbon can be obtained back after burning.
8. Burning of candle is a chemical process.
9. We can get back the candle from carbon dioxide and moisture after burning.
10. Rusting changes the colour of iron.
Answers - 1.False 2.False 3.True 4.False 5.False 6.True 7.False 8.True 9.False 10.True
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