EASY
7th CBSE
IMPORTANT
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A chemical change always gives rise to

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Important Questions on Physical and Chemical Changes

EASY
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 6 - Physical and Chemical Changes>STEP UP>Q 2
Galvanization is the process of depositing a layer of _____ on _____.
MEDIUM
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 6 - Physical and Chemical Changes>STEP UP>Q 2
Ships rust faster than ordinary iron equipment because _____.
MEDIUM
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 6 - Physical and Chemical Changes>STEP UP>Q 2
Crystallisation is an example of _____
MEDIUM
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 6 - Physical and Chemical Changes>STEP UP>Q 3
Are physical or chemical changes (or both) involved in the following case? Explain your answer.
The evaporation of seawater to produce common salt.
MEDIUM
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 6 - Physical and Chemical Changes>STEP UP>Q 3
Are physical or chemical changes (or both) involved in the following case? Explain your answer.
The reaction of sodium hydroxide with hydrochloric acid to produce common salt.
MEDIUM
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 6 - Physical and Chemical Changes>STEP UP>Q 3
Are physical or chemical changes (or both) involved in the following case? Explain your answer.
The formation of acid rain.
MEDIUM
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 6 - Physical and Chemical Changes>STEP UP>Q 3
Are physical or chemical changes (or both) involved in the following case? Explain your answer.
Treating an ant bite with calamine lotion.
EASY
7th CBSE
IMPORTANT
CONCERT Science 7>Chapter 6 - Physical and Chemical Changes>STEP UP>Q 4
Saliva in our mouth breaks down starch in food by