EASY
7th CBSE
IMPORTANT
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Dissolving sugar in water is a change. (physical / chemical)

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Important Questions on How Things React With One Another

MEDIUM
7th CBSE
IMPORTANT
Start Up Science 7>Chapter 6 - How Things React With One Another>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q C
The process of depositing a layer of zinc on iron is called _____.
EASY
7th CBSE
IMPORTANT
Start Up Science 7>Chapter 6 - How Things React With One Another>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q C
Crystals of pure substances are obtained from their solutions by _____ (Crystallisation/liquidification).
EASY
7th CBSE
IMPORTANT
Start Up Science 7>Chapter 6 - How Things React With One Another>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q C
Hydrated iron oxide is called _____ (Fe3O4/Rust).
EASY
7th CBSE
IMPORTANT
Start Up Science 7>Chapter 6 - How Things React With One Another>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q C
Cutting of wood is a physical change.
EASY
7th CBSE
IMPORTANT
Start Up Science 7>Chapter 6 - How Things React With One Another>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q C
During a physical change, new substances are formed.
MEDIUM
7th CBSE
IMPORTANT
Start Up Science 7>Chapter 6 - How Things React With One Another>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q C
Energy changes always occur during a chemical change.
EASY
7th CBSE
IMPORTANT
Start Up Science 7>Chapter 6 - How Things React With One Another>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q C
Rusting of iron takes place in the presence of water only.
MEDIUM
7th CBSE
IMPORTANT
Start Up Science 7>Chapter 6 - How Things React With One Another>EXERCISES FOR FORMATIVE AND SUMMATIVE ASSESSMENT>Q C
Rusting of iron can be prevented by wrapping iron articles in paper.